Klaus Hartmann Hartfelder

Scopus Publications

Retroelement expansions underlie genome evolution in stingless bees
Natalia de Souza Araujo, Patricia Azevedo, Rafael Rodrigues Ferrari, Lucas Borges dos Santos, Florence Rodriguez, Roberta Cornélio Ferreira Nocelli, Matthew Hudson, Thiago Mafra Batista, Klaus Hartfelder, Serge Aron
BMC Genomics, 2026
Stingless bees serve as crucial pollinators and are increasingly recognized as models for investigating behavioral and genomic evolution in insects. In the genus Melipona, a major difference in heterochromatin organization defines two groups: Group I species (e.g., M. quadrifasciata) with < 50% of pericentromeric heterochromatin and Group II species (e.g., M. scutellaris) containing > 50% heterochromatin across their chromosomes. These differences are believed to correlate with genome size and transposable element (TE) content, offering a unique opportunity to explore how heterochromatin variation, TE dynamics, and chromosomal evolution interact in a phylogenetic context. We present pseudo-chromosome-level genome assemblies for M. quadrifasciata and M. scutellaris obtained through long-read sequencing and 3D chromosome conformation scaffolding. Comparative analyses reveal conserved synteny but marked divergence in structural variants and TE types. M. scutellaris exhibits an expansion of retrotransposons, particularly Gypsy/DIRS1 elements, concentrated in TE hotspots linked to chromosomal rearrangements and structural variants. This coincides with distinct methylation entropy patterns across the genome and an expansion of histone deacetylase orthologs. The increased proportion of retrotransposons in M. scutellaris is counterbalanced by more DNA transposons in M. quadrifasciata, resulting in genomes of similar overall sizes but with distinct heterochromatin distributions. Advancing our understanding of genome evolution in eusocial insects, we provide high-resolution genomic resources for two Melipona species that differ in heterochromatin content. Our results highlight the complex role of TEs in shaping genomes and underscore their influence on chromosomal and epigenetic innovation, providing compelling evidence that TE dynamics underlie the pronounced heterochromatic differences observed in Melipona.
Rethinking the epigenetic foundations of social behavior evolution in insects
Carlos AM Cardoso-Júnior, Klaus Hartfelder
Current Opinion in Insect Science, 2026
Gene body DNA methylation is an evolutionarily conserved, stable yet reversible modification of DNA, where cytosines in CpG contexts are covalently methylated (5-methyl-cytosine) by DNA methyltransferase (DNMT) enzymes. The discovery of a functional gene body DNA methylation system in honey bees (Apis mellifera L.) with high homology to the human machinery has positioned social insects, including wasps, ants, and bees, as tractable models for epigenetic research. Their advanced societies consist of multiple phenotypes with distinct morphologies, physiologies, and behaviors, all developed from the same genome. Here we examine seminal studies on DNA methylation in social Hymenoptera, focusing on three recent advances: (i) gene body DNA methylation has minimal, if any, effect on transcription; (ii) methylomes are faithfully inherited across generations and somatic tissues; and (iii) DNMT1 is essential for the germline but dispensable for somatic development. As a mechanistic complement to Hamilton's inclusive fitness theory, we propose that colony-specific gene body DNA methylation patterns may facilitate (but not determine) the multiple independent transitions to eusociality in Hymenoptera. With the framework of a 'DNA methylation-mediated Genetic Recombination Hypothesis', we suggest that DNMT1-maintained gene body DNA methylation accelerates genome evolution toward social complexity in eusocial species. On the other hand, DNMT3, likely operating downstream of the sex-determination pathways, promotes altruism in sterile workers in the presence of the queen, possibly through DNA methylation-independent mechanisms.
Sex-specific division of labor in termites is linked to differential brain architecture and foraging gene expression
Iago Bueno da Silva, Arthur Roque Justino, Jaqueline Eterna Batista, Lohan Valadares, Klaus Hartfelder, Fabio Santos do Nascimento
Iscience, 2026
gene expression in workers and soldiers of different termite species, suggesting species-dependent effects on foraging. Our findings represent a first step toward elucidating how structural and functional brain changes underlie sex-specific division of labor in termites.
A sterility-associated long noncoding RNA involved in honey bee caste determination and adult queen and worker fertility
Carlos A. M. Cardoso-Júnior, Gustavo J. Tibério, Marina C. Peruzzolo, Luiz C. Vieira, Denyse C. Lago, Alexandre R. Paschoal, Isobel Ronai, Benjamin P. Oldroyd, Klaus Hartfelder
Proceedings of the National Academy of Sciences of the United States of America, 2026
Insect sociality is a major evolutionary transition based on the suppression of worker reproduction in favor of a queen’s reproductive monopoly. Although sophisticated insect societies have arisen independently on multiple occasions in the Hymenoptera (bees, ants, and wasps), how worker sterility evolved through natural selection is not fully understood. In honey bees ( Apis mellifera ), dietary cues (royal or worker jelly) and social chemical signals (e.g., queen pheromones) promote caste differentiation by modulating the levels of juvenile hormone (JH), the key physiological orchestrator of caste determination in larvae and the maintenance of caste identity in adults. However, the precise molecular effects of JH on the ovaries of larvae and adult bees remain open questions. Here, we describe lncov1 , a long noncoding RNA (lncRNA), whose expression correlates with sterility in the ovaries of larvae and adult honey bees. Mechanistically, the low JH levels in worker larvae promote high lncov1 expression in their ovaries, which subsequently show extensive programmed cell death. Moreover, lncov1 expression is tightly connected to a reduction in the reproductive capacity of adult queens and workers, as this lncRNA responds to key environmental cues that regulate fertility, including royal jelly and queen pheromone. The sequence conservation of the lncov1 gene across eusocial bees, especially the genus Apis , suggests the evolutionary stability of the JH/ lncov1 pathway. Therefore, by revealing how nutritional and social cues acting through JH and lncov1 shape queen and worker fertility in honey bees, these findings position lncRNAs as key components in the evolution of social complexity in insects.
Social task and aggressiveness shape immunity gene expression levels in the head of highly eusocial bees
Leonardo Campana, Carlos Antônio Mendes Cardoso Júnior, Anete Pedro Lourenço, Klaus Hartfelder
Animal Behaviour, 2025
The genomes sequenced for the neotropical stingless bees Scaptotrigona bipunctata and S. depilis strengthen the phylogenomics support for the taxonomy of social bees
Paulo Gonzalez Hofstatter, Flávia Cristina de Paula Freitas, Danielle Luna-Lucena, Leonardo Campana, Klaus Hartfelder
Genetics and Molecular Biology, 2025
Bees are fundamental factors in ecology and agriculture due to their ecosystem services as pollinators, including many important crops. Because of its ecological significance and value to humans, the honey bee, Apis mellifera, was one of the earliest insect species targeted for genome sequencing, and over the last decades, many other species of social bees, including practically all species comprising the genus Apis and dozens of bumble bee species (Bombini) have complete genome assemblies deposited in public databases. The largest clade of the social bees, the stingless bees (Meliponini), is, however, strongly underrepresented. To date, only five genomes for species of three genera have been released for the New World stingless bees, which comprise over 400 species distributed in 32 genera. Different from the honey bee, these species are native to the Neotropics, being important pollinators of many native plants and cultivars, including greenhouse cultures. We present here the genome assemblies for two species of the genus Scaptotrigona, one of the largest genera among the stingless bees in Brazil. The new datasets are highly complete and, as shown in our phylogenomics analysis, these genomes provide robust support for the clades of the corbiculate bees and their evolutionary history.
A versatile recording device for the analysis of continuous daily external activity in colonies of highly eusocial bees
Arthur Roque Justino, Klaus Hartfelder
Journal of Comparative Physiology A Neuroethology Sensory Neural and Behavioral Physiology, 2024
Positive selection in cytochrome P450 genes is associated with gonad phenotype and mating strategy in social bees
Denyse Cavalcante Lago, Luísa Czamanski Nora, Martin Hasselmann, Klaus Hartfelder
Scientific Reports, 2023
The honey bee, Apis mellifera differs from all other social bees in its gonad phenotype and mating strategy. Honey bee queens and drones have tremendously enlarged gonads, and virgin queens mate with several males. In contrast, in all the other bees, the male and female gonads are small, and the females mate with only one or very few males, thus, suggesting an evolutionary and developmental link between gonad phenotype and mating strategy. RNA-seq comparisons of A. mellifera larval gonads revealed 870 genes as differentially expressed in queens versus workers and drones. Based on Gene Ontology enrichment we selected 45 genes for comparing the expression levels of their orthologs in the larval gonads of the bumble bee Bombus terrestris and the stingless bee, Melipona quadrifasciata, which revealed 24 genes as differentially represented. An evolutionary analysis of their orthologs in 13 solitary and social bee genomes revealed four genes with evidence of positive selection. Two of these encode cytochrome P450 proteins, and their gene trees indicated a lineage-specific evolution in the genus Apis, indicating that cytochrome P450 genes may be involved in the evolutionary association of polyandry and the exaggerated gonad phenotype in social bees.
Reproductive potential shapes the expression of nurse-to-forager transition genes in the workers of stingless bees (Meliponini)
Larissa D. Ribeiro de Souza, Klaus Hartfelder
Apidologie, 2023
Little is known about the molecular mechanisms that underlie the division of labor in stingless bees. We investigated the expression of a set of candidate genes associated with the nurse-to-forager transition in the honey bee in two stingless bee species, Melipona quadrifasciata and Frieseomelitta varia. These species differ with respect to worker reproduction. The workers of M. quadrifasciata lay trophic and reproductive eggs, but those of F. varia are completely sterile. For M. quadrifasciata nurses, we found elevated vitellogenin (Vg) and low juvenile hormone esterase (jhe) transcript levels in the abdomen, in agreement with their reproductive potential. In F. varia, Vg and methyl farnesoate epoxidase (mfe) transcript levels were high in the heads of foragers, indicating an association with foraging behavior. For malvolio (mvl) and foraging (for), both involved with food search behavior, mvl showed persistent low expression in the head, but increasing levels in the abdomen of both species, speaking against a role in behavioral development. The for transcript levels in F. varia were higher in foragers, both in the head and the abdomen, i.e., consistent with foraging. In M. quadrifasciata, however, for expression was higher in the heads of nurse bees, and, thus, is unlikely to play a role in foraging. The results for the two stingless bee species, in comparison with honey bees and bumble bees, indicate that the degree of worker sterility appears to be the primary factor that shapes the expression pattern of key genes in the life history of social bees.
Behavior, ovarian status, and juvenile hormone titer in the emblematic social wasp Zethus miniatus (Vespidae, Eumeninae)
HC Kelstrup, MJ West-Eberhard, FS Nascimento, LM Riddiford, K Hartfelder
Behavioral Ecology and Sociobiology, 2023
Sex- and caste-specific transcriptomes of larval honey bee (Apis mellifera L.) gonads: DMRT A2 and Hsp83 are differentially expressed and regulated by juvenile hormone
Denyse Cavalcante Lago, Martin Hasselmann, Klaus Hartfelder
Insect Molecular Biology, 2022
Molecular underpinnings of division of labour among workers in a socially complex termite
Daniel Elsner, Klaus Hartfelder, Judith Korb
Scientific Reports, 2021
DNA methylation is not a driver of gene expression reprogramming in young honey bee workers
Carlos A. M. Cardoso‐Júnior, Boris Yagound, Isobel Ronai, Emily J. Remnant, Klaus Hartfelder, Benjamin P. Oldroyd
Molecular Ecology, 2021
Juvenile hormone affects age polyethism, ovarian status and cuticular hydrocarbon profile in workers of the wasp Polybia occidentalis
Amanda Prato, Rafael C. da Silva, Diego S. Assis, Sidnei Mateus, Klaus Hartfelder, Fabio S. do Nascimento
Journal of Experimental Biology, 2021
Transcriptomic Signatures of Ageing Vary in Solitary and Social Forms of an Orchid Bee
Alice Séguret, Eckart Stolle, Fernando A Fleites-Ayil, José Javier G Quezada-Euán, Klaus Hartfelder, Karen Meusemann, Mark C Harrison, Antonella Soro, Robert J Paxton
Genome Biology and Evolution, 2021
Apidologie 50 years
Christiane Courant, Gudrun Koeniger, Klaus Hartfelder
Apidologie, 2021
Larval food provisions affect developmental time, body size and vitellogenin titers of Scaptotrigona pectoralis gynes (Hymenoptera: Meliponini)
A. Morales, K. Hartfelder, S. Medina-Peralta, J. J. G. Quezada-Euán
Insectes Sociaux, 2021
Caste Differentiation: Honey Bees
Mário Sérgio Cervoni, Klaus Hartfelder
Encyclopedia of Social Insects, 2021
Queen pheromone modulates the expression of epigenetic modifier genes in the brain of honeybee workers: Epigenetics in honey bee communication
Carlos Antônio Mendes Cardoso-Junior, Isobel Ronai, Klaus Hartfelder, Benjamin P. Oldroyd
Biology Letters, 2020
Testis development and spermatogenesis in drones of the honey bee, Apis mellifera L.
Denyse C. Lago, Juliana R. Martins, Rodrigo P. Dallacqua, Douglas Elias Santos, Marcia M. G. Bitondi, Klaus Hartfelder
Apidologie, 2020
The nuclear and mitochondrial genomes of Frieseomelitta varia - A highly eusocial stingless bee (Meliponini) with a permanently sterile worker caste
Flávia C. de Paula Freitas, Anete P. Lourenço, Francis M. F. Nunes, Alexandre R. Paschoal, Fabiano C. P. Abreu, Fábio O. Barbin, Luana Bataglia, Carlos A. M. Cardoso-Júnior, Mário S. Cervoni, Saura R. Silva, Fernanda Dalarmi, Marco A. Del Lama, Thiago S. Depintor, Kátia M. Ferreira, Paula S. Gória, Michael C. Jaskot, Denyse C. Lago, Danielle Luna-Lucena, Livia M. Moda, Leonardo Nascimento, Matheus Pedrino, Franciene Rabiço Oliveira, Fernanda C. Sanches, Douglas E. Santos, Carolina G. Santos, Joseana Vieira, Angel R. Barchuk, Klaus Hartfelder, Zilá L. P. Simões, Márcia M. G. Bitondi, Daniel G. Pinheiro
BMC Genomics, 2020
Differential expression of antioxidant system genes in honey bee (Apis mellifera L.) caste development mitigates ROS-mediated oxidative damage in queen larvae
Douglas Elias Santos, Anderson de Oliveira Souza, Gustavo Jacomini Tibério, Luciane Carla Alberici, Klaus Hartfelder
Genetics and Molecular Biology, 2020
Darwin brokered other publications
Antonio C. Marques, Klaus Hartfelder
Nature, 2019
Effects of larval Age at Grafting and Juvenile Hormone on Morphometry and Reproductive Quality Parameters of in Vitro Reared Honey Bees (Hymenoptera: Apidae)
Daiana A De Souza, Klaus H Hartfelder, David R Tarpy
Journal of Economic Entomology, 2019
Immunosenescence in honey bees (Apis mellifera L.) is caused by intrinsic senescence and behavioral physiology
Anete Pedro Lourenço, Juliana Ramos Martins, Fernanda Andrade Silva Torres, Aline Mackert, Luiz Roberto Aguiar, Klaus Hartfelder, Márcia Maria Gentile Bitondi, Zilá Luz Paulino Simões
Experimental Gerontology, 2019
Juvenile hormone signaling in insect oogenesis
Carolina Gonçalves Santos, Fernanda Carvalho Humann, Klaus Hartfelder
Current Opinion in Insect Science, 2019
Social context influences the expression of DNA methyltransferase genes in the honeybee
Carlos Antônio Mendes Cardoso-Júnior, Michael Eyer, Benjamin Dainat, Klaus Hartfelder, Vincent Dietemann
Scientific Reports, 2018
Erratum to: Social context influences the expression of DNA methyltransferase genes in the honeybee (Scientific Reports, (2018), 8, 1, (11076), 10.1038/s41598-018-29377-8)
Carlos Antônio Mendes Cardoso-Júnior, Michael Eyer, Benjamin Dainat, Klaus Hartfelder, Vincent Dietemann
Scientific Reports, 2018
Accessory gland proteins of males in the male-diphenic ant Cardiocondyla obscurior
Marion Fuessl, Carolina G. Santos, Klaus Hartfelder, Alexandra Schrempf, Jürgen Heinze
Physiological Entomology, 2018
Recent advances in reproductive biology of stingless bees
A. Vollet-Neto, S. Koffler, C. F. dos Santos, C. Menezes, F. M. F. Nunes, K. Hartfelder, V. L. Imperatriz-Fonseca, D. A. Alves
Insectes Sociaux, 2018
Molecular signatures of phenotypic and behavioral plasticity in bees
Klaus Hartfelder
Apidologie, 2018
The behavior and reproductive physiology of a solitary progressive provisioning vespid wasp: Evidence for a solitary-cycle origin of reproductive castes
Hans C. Kelstrup, Klaus Hartfelder, Tiago Falcon Lopes, Theresa C. Wossler
American Naturalist, 2018
The ovary and its genes—developmental processes underlying the establishment and function of a highly divergent reproductive system in the female castes of the honey bee, Apis mellifera
Klaus Hartfelder, Gustavo Jacomini Tiberio, Denyse Cavalcante Lago, Rodrigo Pires Dallacqua, Marcia Maria Gentile Bitondi
Apidologie, 2018
DNA methylation affects the lifespan of honey bee (Apis mellifera L.) workers – Evidence for a regulatory module that involves vitellogenin expression but is independent of juvenile hormone function
Carlos A.M. Cardoso-Júnior, Karina R. Guidugli-Lazzarini, Klaus Hartfelder
Insect Biochemistry and Molecular Biology, 2018
Mitochondrial capacity, oxidative damage and hypoxia gene expression are associated with age-related division of labor in honey bee (Apis mellifera L.) workers
Mário S. Cervoni, Carlos A. M. Cardoso-Júnior, Giovana Craveiro, Anderson de O. Souza, Luciane C. Alberici, Klaus Hartfelder
Journal of Experimental Biology, 2017
Methyl farnesoate epoxidase (mfe) gene expression and juvenile hormone titers in the life cycle of a highly eusocial stingless bee, Melipona scutellaris
Carlos Antônio Mendes Cardoso-Júnior, Renato Pereira Silva, Naiara Araújo Borges, Washington João de Carvalho, S. Leal Walter, Zilá Luz Paulino Simões, Marcia Maria Gentile Bitondi, Carlos Ueira Vieira, Ana Maria Bonetti, Klaus Hartfelder
Journal of Insect Physiology, 2017
Juvenile hormone titers, ovarian status and epicuticular hydrocarbons in gynes and workers of the paper wasp Belonogaster longitarsus
Hans C. Kelstrup, Klaus Hartfelder, Nanike Esterhuizen, Theresa C. Wossler
Journal of Insect Physiology, 2017
Toward an Understanding of Divergent Compound Eye Development in Drones and Workers of the Honeybee (Apis mellifera L.): A Correlative Analysis of Morphology and Gene Expression
David S. Marco Antonio, Klaus Hartfelder
Journal of Experimental Zoology Part B Molecular and Developmental Evolution, 2017
The third of a series of articles for the 60th anniversary of the Brazilian society of genetics
Francisco Mauro Salzano, Fabrício Rodrigues dos Santos, Klaus Hartfelder, Carlos F.M. Menck
Genetics and Molecular Biology, 2017
Epigenetic modifications and their relation to caste and sex determination and adult division of labor in the stingless bee Melipona scutellaris
Carlos A.M. Cardoso-Júnior, Patrícia Tieme Fujimura, Célio Dias Santos-Júnior, Naiara Araújo Borges, Carlos Ueira-Vieira, Klaus Hartfelder, Luiz Ricardo Goulart, Ana Maria Bonetti
Genetics and Molecular Biology, 2017
Differential gene expression underlying ovarian phenotype determination in honey bee, Apis mellifera L., caste development
Denyse Cavalcante Lago, Fernanda Carvalho Humann, Angel Roberto Barchuk, Kuruvilla Joseph Abraham, Klaus Hartfelder
Insect Biochemistry and Molecular Biology, 2016
The second of a series of articles for the 60th anniversary of the Brazilian society of genetics
Francisco Mauro Salzano, Fabrício Rodrigues dos Santos, Klaus Hartfelder, Carlos F.M. Menck
Genetics and Molecular Biology, 2016
The first of a series of articles dedicated to the 60th anniversary of the Brazilian Society of Genetics (SBG)
Francisco Mauro Salzano, Fabrício Rodrigues dos Santos, Klaus Hartfelder, Carlos F.M. Menck
Genetics and Molecular Biology, 2016
Mitochondrial structure and dynamics as critical factors in honey bee (Apis mellifera L.) caste development
Douglas Elias Santos, Luciane Carla Alberici, Klaus Hartfelder
Insect Biochemistry and Molecular Biology, 2016
Polistes smithii vs. Polistes dominula: the contrasting endocrinology and epicuticular signaling of sympatric paper wasps in the field
Hans C. Kelstrup, Klaus Hartfelder, Theresa C. Wossler
Behavioral Ecology and Sociobiology, 2015
Developmental ecdysteroid titers and DNA puffs in larvae of two sciarid species, Rhynchosciara americana and Rhynchosciara milleri (Diptera: Sciaridae)
M. A. M. Soares, K. Hartfelder, J. M. Tesserolli de Souza, A. J. Stocker
Genetica, 2015
Insights into the dynamics of hind leg development in honey bee (Apis mellifera L.) queen and worker larvae - A morphology/differential gene expression analysis
Carolina Gonçalves Santos, Klaus Hartfelder
Genetics and Molecular Biology, 2015
Genomic signatures of evolutionary transitions from solitary to group living
Karen M. Kapheim, Hailin Pan, Cai Li, Steven L. Salzberg, Daniela Puiu, Tanja Magoc, Hugh M. Robertson, Matthew E. Hudson, Aarti Venkat, Brielle J. Fischman, Alvaro Hernandez, Mark Yandell, Daniel Ence, Carson Holt, George D. Yocum, William P. Kemp, Jordi Bosch, Robert M. Waterhouse, Evgeny M. Zdobnov, Eckart Stolle, F. Bernhard Kraus, Sophie Helbing, Robin F. A. Moritz, Karl M. Glastad, Brendan G. Hunt, Michael A. D. Goodisman, Frank Hauser, Cornelis J. P. Grimmelikhuijzen, Daniel Guariz Pinheiro, Francis Morais Franco Nunes, Michelle Prioli Miranda Soares, Érica Donato Tanaka, Zilá Luz Paulino Simões, Klaus Hartfelder, Jay D. Evans, Seth M. Barribeau, Reed M. Johnson, Jonathan H. Massey, Bruce R. Southey, Martin Hasselmann, Daniel Hamacher, Matthias Biewer, Clement F. Kent, Amro Zayed, Charles Blatti, Saurabh Sinha, J. Spencer Johnston, Shawn J. Hanrahan, Sarah D. Kocher, Jun Wang, Gene E. Robinson, Guojie Zhang
Science, 2015
The genomes of two key bumblebee species with primitive eusocial organization
Ben M Sadd, Seth M Barribeau, Guy Bloch, Dirk C de Graaf, Peter Dearden, Christine G Elsik, Jürgen Gadau, Cornelis JP Grimmelikhuijzen, Martin Hasselmann, Jeffrey D Lozier, Hugh M Robertson, Guy Smagghe, Eckart Stolle, Matthias Van Vaerenbergh, Robert M Waterhouse, Erich Bornberg-Bauer, Steffen Klasberg, Anna K Bennett, Francisco Câmara, Roderic Guigó, Katharina Hoff, Marco Mariotti, Monica Munoz-Torres, Terence Murphy, Didac Santesmasses, Gro V Amdam, Matthew Beckers, Martin Beye, Matthias Biewer, Márcia MG Bitondi, Mark L Blaxter, Andrew FG Bourke, Mark JF Brown, Severine D Buechel, Rossanah Cameron, Kaat Cappelle, James C Carolan, Olivier Christiaens, Kate L Ciborowski, David F Clarke, Thomas J Colgan, David H Collins, Andrew G Cridge, Tamas Dalmay, Stephanie Dreier, Louis du Plessis, Elizabeth Duncan, Silvio Erler, Jay Evans, Tiago Falcon, Kevin Flores, Flávia CP Freitas, Taro Fuchikawa, Tanja Gempe, Klaus Hartfelder, Frank Hauser, Sophie Helbing, Fernanda C Humann, Frano Irvine, Lars S Jermiin, Claire E Johnson, Reed M Johnson, Andrew K Jones, Tatsuhiko Kadowaki, Jonathan H Kidner, Vasco Koch, Arian Köhler, F Bernhard Kraus, H Michael G Lattorff, Megan Leask, Gabrielle A Lockett, Eamonn B Mallon, David S Marco Antonio, Monika Marxer, Ivan Meeus, Robin FA Moritz, Ajay Nair, Kathrin Näpflin, Inga Nissen, Jinzhi Niu, Francis MF Nunes, John G Oakeshott, Amy Osborne, Marianne Otte, Daniel G Pinheiro, Nina Rossié, Olav Rueppell, Carolina G Santos, Regula Schmid-Hempel, Björn D Schmitt, Christina Schulte, Zilá LP Simões, Michelle PM Soares, Luc Swevers, Eva C Winnebeck, Florian Wolschin, Na Yu, Evgeny M Zdobnov, Peshtewani K Aqrawi, Kerstin P Blankenburg, Marcus Coyle, Liezl Francisco, Alvaro G Hernandez, Michael Holder, Matthew E Hudson, LaRonda Jackson, Joy Jayaseelan, Vandita Joshi, Christie Kovar, Sandra L Lee, Robert Mata, Tittu Mathew, Irene F Newsham, Robin Ngo, Geoffrey Okwuonu, Christopher Pham, Ling-Ling Pu, Nehad Saada, Jireh Santibanez, DeNard Simmons, Rebecca Thornton, Aarti Venkat, Kimberly KO Walden, Yuan-Qing Wu, Griet Debyser, Bart Devreese, Claire Asher, Julie Blommaert, Ariel D Chipman, Lars Chittka, Bertrand Fouks, Jisheng Liu, Meaghan P O’Neill, Seirian Sumner, Daniela Puiu, Jiaxin Qu, Steven L Salzberg, Steven E Scherer, Donna M Muzny, Stephen Richards, Gene E Robinson, Richard A Gibbs, Paul Schmid-Hempel, Kim C Worley
Genome Biology, 2015
Amplification and expression of a salivary gland DNA puff gene in the prothoracic gland of Bradysia hygida (Diptera: Sciaridae)
Juliana Aparecida Candido-Silva, Maiaro Cabral Rosa Machado, Klaus Hartmann Hartfelder, Jorge Cury de Almeida, Maria Luisa Paçó-Larson, Nadia Monesi
Journal of Insect Physiology, 2015
Old Threads Make New Tapestry-Rewiring of Signalling Pathways Underlies Caste Phenotypic Plasticity in the Honey Bee, Apis mellifera L.
Klaus Hartfelder, Karina R. Guidugli-Lazzarini, Mario S. Cervoni, Douglas E. Santos, Fernanda C. Humann
Advances in Insect Physiology, 2015
The scent of royalty: A P450 gene signals reproductive status in a social insect
Katharina Hoffmann, Johannes Gowin, Klaus Hartfelder, Judith Korb
Molecular Biology and Evolution, 2014
Identification of differentially expressed genes in female Drosophila antonietae and Drosophila meridionalis in response to host cactus odor
Camila M Borgonove, Carla B Cavallari, Mateus H Santos, Rafaela Rossetti, Klaus Hartfelder, Maura H Manfrin
BMC Evolutionary Biology, 2014
Molecular analysis of Aedes aegypti classical protein tyrosine phosphatases uncovers an ortholog of mammalian PTP-1B implicated in the control of egg production in mosquitoes
Debora Monteiro Moretti, Lalima Gagan Ahuja, Rodrigo Dutra Nunes, Cecília Oliveira Cudischevitch, Carlos Renato Oliveira Daumas-Filho, Priscilla Medeiros-Castro, Guilherme Ventura-Martins, Willy Jablonka, Felipe Gazos-Lopes, Raquel Senna, Marcos Henrique Ferreira Sorgine, Klaus Hartfelder, Margareth Capurro, Georgia Correa Atella, Rafael Dias Mesquita, Mário Alberto Cardoso Silva-Neto
Plos One, 2014
Reproductive status, endocrine physiology and chemical signaling in the Neotropical, swarm-]founding eusocial wasp Polybia micans
Hans C. Kelstrup, Klaus Hartfelder, Fabio S. Nascimento, Lynn M. Riddiford
Journal of Experimental Biology, 2014
Juvenile hormone biosynthesis gene expression in the corpora allata of honey bee (Apis mellifera L.) female castes
Ana Durvalina Bomtorin, Aline Mackert, Gustavo Conrado Couto Rosa, Livia Maria Moda, Juliana Ramos Martins, Márcia Maria Gentile Bitondi, Klaus Hartfelder, Zilá Luz Paulino Simões
Plos One, 2014
The role of juvenile hormone in dominance behavior, reproduction and cuticular pheromone signaling in the caste-flexible epiponine wasp, Synoeca surinama
Hans C Kelstrup, Klaus Hartfelder, Fabio S Nascimento, Lynn M Riddiford
Frontiers in Zoology, 2014
Cell death and tissue reorganization in Rhynchosciara americana (Sciaridae: Diptera) metamorphosis and their relation to molting hormone titers
Amanda dos Santos Brandão, Jônatas Bussador do Amaral, Paula Rezende-Teixeira, Klaus Hartfelder, Fábio Siviero, Gláucia Maria Machado-Santelli
Arthropod Structure and Development, 2014
Developmental regulation of ecdysone receptor (EcR) and EcR-controlled gene expression during pharate-adult development of honeybees (Apis mellifera)
Tathyana R. P. Mello, Aline C. Aleixo, Daniel G. Pinheiro, Francis M. F. Nunes, MÃ¡rcia M. G. Bitondi, Klaus Hartfelder, Angel R. Barchuk, ZilÃ¡ L. P. SimÃµes
Frontiers in Genetics, 2014
Insulin-like peptides (amilp1 and amilp2) differentially affect female caste development in the honey bee (apis mellifera l.)
Ying Wang, Sergio V. Azevedo, Klaus Hartfelder, Gro Amdam
Journal of Experimental Biology, 2013
Polinizadores do Brasil
Klaus Hartfelder
Estudos Avancados, 2013
Standard methods for physiology and biochemistry research in Apis mellifera
Klaus Hartfelder, Márcia M G Bitondi, Colin S Brent, Karina R Guidugli-Lazzarini, Zilá L P Simões, Anton Stabentheiner, Érica D Tanaka, Ying Wang
Journal of Apicultural Research, 2013
Sequence and expression characteristics of long noncoding RNAs in honey bee caste development--potential novel regulators for transgressive ovary size.
Fernanda C. Humann, Gustavo J. Tiberio, Klaus Hartfelder
Plos One, 2013
Endocrine Control of Insect Polyphenism
K. Hartfelder, D.J. Emlen
Insect Endocrinology, 2012
Unconventional cadherin localization in honey bee gonads revealed through domain-specific Apis mellifera E- and N-cadherin antibodies indicates alternative functions
Mônica Florecki, Klaus Hartfelder
Insects, 2012
Development and evolution of caste dimorphism in honeybees - a modeling approach
Olof Leimar, Klaus Hartfelder, Manfred D. Laubichler, Robert E. Page
Ecology and Evolution, 2012
Gene copy number and differential gene expression in haploid and diploid males of the stingless bee, Melipona quadrifasciata
A. A. Borges, F. C. Humann, M. G. Tavares, L. A. O. Campos, K. Hartfelder
Insectes Sociaux, 2012
Molting dynamics and juvenile hormone titer profiles in the nymphal stages of a lower termite, Cryptotermes secundus (Kalotermitidae) - signatures of developmental plasticity
Judith Korb, Katharina Hoffmann, Klaus Hartfelder
Journal of Insect Physiology, 2012
Transcript levels of ten caste-related genes in adult diploid males of Melipona quadrifasciata(Hymenoptera, Apidae) - A comparison with haploid males, queens and workers
Andreia A. Borges, Fernanda C. Humann, Lucio A. Oliveira Campos, Mara G. Tavares, Klaus Hartfelder
Genetics and Molecular Biology, 2011
Representational Difference Analysis (RDA) reveals differential expression of conserved as well as novel genes during caste-specific development of the honey bee (Apis mellifera L.) ovary
Fernanda C. Humann, Klaus Hartfelder
Insect Biochemistry and Molecular Biology, 2011
Insulin-like peptide genes in honey bee fat body respond differently to manipulation of social behavioral physiology
Kari-Anne Nilsen, Kate E. Ihle, Katy Frederick, M. Kim Fondrk, Bente Smedal, Klaus Hartfelder, Gro V. Amdam
Journal of Experimental Biology, 2011
Effects of Plasmodium gallinaceum on hemolymph physiology of Aedes aegypti during parasite development
Ricardo Vieira Araujo, Ceres Maciel, Klaus Hartfelder, Margareth Lara Capurro
Journal of Insect Physiology, 2011
Endocrine Control of Insect Polyphenism
K. Hartfelder, D.J. Emlen
Insect Endocrinology, 2011
Cytoplasmic and nuclear localization of cadherin in honey bee (Apis mellifera L.) gonads
Mônica M Florecki, Klaus Hartfelder
Cell Biology International, 2011
Differential expression of hypoxia pathway genes in honey bee (Apis mellifera L.) caste development
Sergio Vicente Azevedo, Omar Arvey Martinez Caranton, Tatiane Lippi de Oliveira, Klaus Hartfelder
Journal of Insect Physiology, 2011
Mars is close to venus - Female reproductive proteins are expressed in the fat body and reproductive tract of honey bee (Apis mellifera L.) drones
Nínive Aguiar Colonello-Frattini, Karina Rosa Guidugli-Lazzarini, Zilá Luz Paulino Simões, Klaus Hartfelder
Journal of Insect Physiology, 2010
Suppression subtractive hybridization analysis reveals expression of conserved and novel genes in male accessory glands of the ant Leptothorax gredleri
Angelika Oppelt, Fernanda C Humann, Marion Fuessl, Sergio V Azevedo, David S Marco Antonio, Jürgen Heinze, Klaus Hartfelder
BMC Evolutionary Biology, 2010
The juvenile hormone (JH) epoxide hydrolase gene in the honey bee (Apis mellifera) genome encodes a protein which has negligible participation in JH degradation
Aline Mackert, Klaus Hartfelder, Márcia Maria Gentile Bitondi, Zilá Luz Paulino Simões
Journal of Insect Physiology, 2010
Developmental characterization, function and regulation of a Laccase2 encoding gene in the honey bee, Apis mellifera (Hymenoptera, Apinae)
Moysés Elias-Neto, Michelle P.M. Soares, Zilá L.P. Simões, Klaus Hartfelder, Márcia M.G. Bitondi
Insect Biochemistry and Molecular Biology, 2010
Endocrine signatures underlying plasticity in postembryonic development of a lower termite, Cryptotermes secundus (Kalotermitidae)
Judith Korb, Katharina Hoffmann, Klaus Hartfelder
Evolution and Development, 2009
Ovariole structure and oogenesis in queens and workers of the stingless bee melipona quadrifasciata (hymenoptera: Apidae, meliponini) kept under different social conditions
Érica Donato Tanaka, Weyder Cristiano Santana, Klaus Hartfelder
Apidologie, 2009
Sequence and expression pattern of the germ line marker vasa in honey bees and stingless bees
Érica Donato Tanaka, Klaus Hartfelder
Genetics and Molecular Biology, 2009
RNAi-mediated silencing of vitellogenin gene function turns honeybee (Apis mellifera) workers into extremely precocious foragers
David Santos Marco Antonio, Karina Rosa Guidugli-Lazzarini, Adriana Mendes do Nascimento, Zilá Luz Paulino Simões, Klaus Hartfelder
Naturwissenschaften, 2008
Life history and development - A framework for understanding developmental plasticity in lower termites
Judith Korb, Klaus Hartfelder
Biological Reviews, 2008
Catalogue of the bees (Hymenoptera, Apoidea) in the Neotropical region
Klaus Hartfelder
Apidologie, 2008
Expression analysis of putative vitellogenin and lipophorin receptors in honey bee (Apis mellifera L.) queens and workers
Karina Rosa Guidugli-Lazzarini, Adriana Mendes do Nascimento, Érica Donato Tanaka, Maria Dolors Piulachs, Klaus Hartfelder, Márcia Gentile Bitondi, Zilá Luz Paulino Simões
Journal of Insect Physiology, 2008
The insulin signaling pathway in honey bee (Apis mellifera) caste development - differential expression of insulin-like peptides and insulin receptors in queen and worker larvae
Sergio Vicente de Azevedo, Klaus Hartfelder
Journal of Insect Physiology, 2008
Identification of a juvenile hormone esterase-like gene in the honey bee, Apis mellifera L. - Expression analysis and functional assays
Aline Mackert, Adriana Mendes do Nascimento, Márcia Maria Gentile Bitondi, Klaus Hartfelder, Zilá Luz Paulino Simões
Comparative Biochemistry and Physiology B Biochemistry and Molecular Biology, 2008
Odor discrimination in classical conditioning of proboscis extension in two stingless bee species in comparison to Africanized honeybees
S. I. Mc Cabe, K. Hartfelder, W. C. Santana, W. M. Farina
Journal of Comparative Physiology A Neuroethology Sensory Neural and Behavioral Physiology, 2007
Variation in endocrine signaling underlies variation in social life history
Gro V. Amdam, Kari‐Anne Nilsen, Kari Norberg, M. Kim Fondrk, Klaus Hartfelder
American Naturalist, 2007
An optimized method for the generation of AFLP markers in a stingless bee (Melipona quadrifasciata) reveals a high degree of intracolonial genetic polymorphism
Gustavo R. Makert, Robert J. Paxton, Klaus Hartfelder
Apidologie, 2006
Insights into social insects from the genome of the honeybee Apis mellifera
The Honeybee Genome Sequencing Consortium
Nature, 2006
Ovariole number - A predictor of differential reproductive success among worker subfamilies in queenless honeybee (Apis mellifera L.) colonies
Gustavo R. Makert, Robert J. Paxton, Klaus Hartfelder
Behavioral Ecology and Sociobiology, 2006
Caste development and reproduction: A genome-wide analysis of hallmarks of insect eusociality
A. S. Cristino, F. M. F. Nunes, C. H. Lobo, M. M. G. Bitondi, Z. L. P. Simões, L. Da Fontoura Costa, H. M. G. Lattorff, R. F. A. Moritz, J. D. Evans, K. Hartfelder
Insect Molecular Biology, 2006
Stingless bees: Biology and management
Jacobus C. Biesmeijer, Klaus Hartfelder, Vera Lucia Imperatriz-Fonseca
Apidologie, 2006
Physiological and genetic mechanisms underlying caste development, reproduction and division of labor in stingless bees
Klaus Hartfelder, Gustavo R. Makert, Carla C. Judice, Gonçalo A.G. Pereira, Weyder C. Santana, Rodrigo Dallacqua, Márcia M.G. Bitondi
Apidologie, 2006
Gene expression profiles underlying alternative caste phenotypes in a highly eusocial bee, Melipona quadrifasciata
C. C. Judice, M. F. Carazzole, F. Festa, M. C. Sogayar, K. Hartfelder, G. A. G. Pereira
Insect Molecular Biology, 2006
Social reversal of immunosenescence in honey bee workers
Gro V. Amdam, Anne Lene T.O. Aase, Siri-Christine Seehuus, M. Kim Fondrk, Kari Norberg, Klaus Hartfelder
Experimental Gerontology, 2005
Vitellogenin regulates hormonal dynamics in the worker caste of a eusocial insect
Karina R. Guidugli, Adriana M. Nascimento, Gro V. Amdam, Angel R. Barchuk, Stig Omholt, Zilá L.P. Simões, Klaus Hartfelder
FEBS Letters, 2005
She's my girl - Male accessory gland products and their function in the reproductive biology of social bees
Nínive Aguiar Colonello, Klaus Hartfelder
Apidologie, 2005
Endocrine Control of Insect Polyphenism
K. Hartfelder, D.J. Emlen
Comprehensive Molecular Insect Science, 2005
Reproductive division of labor, dominance, and ecdysteroid levels in hemolymph and ovary of the bumble bee Bombus terrestris
Sharon Geva, Klaus Hartfelder, Guy Bloch
Journal of Insect Physiology, 2005
The use of open reading frame ESTs (ORESTES) for analysis of the honey bee transcriptome
Francis MF Nunes, Valeria Valente, Josane F Sousa, Marco AV Cunha, Daniel G Pinheiro, Rafaela M Maia, Daniela D Araujo, Maria CR Costa, Waleska K Martins, Alex F Carvalho, Nadia Monesi, Adriana M Nascimento, Pablo MV Peixoto, Maria FR Silva, Ricardo GP Ramos, Luis FL Reis, Emmanuel Dias-Neto, Sandro J Souza, Andrew JG Simpson, Marco A Zago, Ademilson EE Soares, Marcia MG Bitondi, Enilza M Espreafico, Foued S Espindola, Maria L Paco-Larson, Zila LP Simoes, Klaus Hartfelder, Wilson A Silva
BMC Genomics, 2004
Caste-specific gene expression in the stingless bee Melipona quadrifasciata - Are there common patterns in highly eusocial bees?
C. Judice, K. Hartfelder, G. A. G. Pereira
Insectes Sociaux, 2004
The initial stages of oogenesis and their relation to differential fertility in the honey bee (Apis mellifera) castes
Erica D. Tanaka, Klaus Hartfelder
Arthropod Structure and Development, 2004
Honey bee (Apis mellifera) transferrin-gene structure and the role of ecdysteroids in the developmental regulation of its expression
Adriana Mendes do Nascimento, Virginie Cuvillier-Hot, Angel Roberto Barchuk, Zilá Luz Paulino Simões, Klaus Hartfelder
Insect Biochemistry and Molecular Biology, 2004
A member of the short-chain dehydrogenase/reductase (SDR) superfamily is a target of the ecdysone response in honey bee (Apis mellifera) caste development
Karina R. Guidugli, Christine Hepperle, Klaus Hartfelder
Apidologie, 2004
Altered physiology in worker honey bees (Hymenoptera: Apidae) infested with the mite Varroa destructor (Acari: Varroidae): A factor in colony loss during overwintering?
Gro V. Amdam, Klaus Hartfelder, Kari Norberg, Arne Hagen, Stig W. Omholt
Journal of Economic Entomology, 2004
Ventral nerve cord remodeling in a stingless bee (Melipona quadrifasciata anthidioides, Hymenoptera, Apidae) depends on ecdysteroid fluctuation and programmed cell death
International Journal of Developmental Biology, 2003
Apoptosis process in mouse Leydig cells during postnatal development
Maria José Salles Faria, Zilá Luz Paulino Simões, Laurelucia Orive Lunardi, Klaus Hartfelder
Microscopy and Microanalysis, 2003
Protein content and pattern during mucus gland maturation and its ecdysteroid control in honey bee drones
N�nive Aguiar Colonello, Klaus Hartfelder
Apidologie, 2003
Ecdysteroid titers in pupae of highly social bees relate to distinct modes of caste development
L.Z. Pinto, K. Hartfelder, M.M.Gentile Bitondi, Z.L.P. Simões
Journal of Insect Physiology, 2002
Juvenile-hormone-dependent interaction of actin and spectrin is crucial for polymorphic differentiation of the larval honey bee ovary
Inês C. Schmidt Capella, Klaus Hartfelder
Cell and Tissue Research, 2002
Ecdysteroid titer and reproduction in queens and workers of the honey bee and of a stingless bee: Loss of ecdysteroid function at increasing levels of sociality?
K. Hartfelder, M.M.G. Bitondi, W.C. Santana, Z.L.P. Simões
Insect Biochemistry and Molecular Biology, 2002
The induction of DNA puff BhC4-1 gene is a late response to the increase in 20-hydroxyecdysone titers in last instar dipteran larvae
L.R. Basso, C. Vasconcelos, A.M. Fontes, K. Hartfelder, J.A. Silva, P.S.R. Coelho, N. Monesi, M.L. Paçó-Larson
Mechanisms of Development, 2002
Differentially expressed regulatory genes in honey bee caste development
C. Hepperle, K. Hartfelder
Naturwissenschaften, 2001
The juvenile hormone analog pyriproxyfen affects ecdysteroid-dependent cuticle melanization and shifts the pupal ecdysteroid peak in the honey bee (Apis mellifera)
M.S Zufelato, M.M.G Bitondi, Z.L.P Simões, K Hartfelder
Arthropod Structure and Development, 2000
Caste-specific differences in ecdysteroid titers in early larval stages of the bumblebee Bombus terrestris
Klaus Hartfelder, Jonathan Cnaani, Abraham Hefetz
Journal of Insect Physiology, 2000
Ecdysteroid titer, ovary status, and dominance in adult worker and queen bumble bees (Bombus terrestris)
Guy Bloch, Abraham Hefetz, Klaus Hartfelder
Journal of Insect Physiology, 2000
Insect juvenile hormone: From "status quo" to high society
K. Hartfelder
Brazilian Journal of Medical and Biological Research, 2000
Identification of Oxygen Containing Volatiles in Cephalic Secretions of Workers of Brazilian Stingless Bees
Wittko Francke, Gunther Lübke, Wolfgang Schröder, Aurélia Reckziegel, Vera Imperatriz-Fonseca, Astrid Kleinert, Elisabeth Engels, Klaus Hartfelder, Rainer Radtke, Wolf Engels
Journal of the Brazilian Chemical Society, 2000
Not only single mating in stingless bees
Robert J. Paxton, Nicole Wei�schuh, Wolf Engels, Klaus Hartfelder, J. Javier G. Quezada-Euan
Naturwissenschaften, 1999
Neurogenesis detected by BrdU incorporation in brains of larval honey bees, Apis mellifera L. (Hymenoptera : Apidae)
Hans Hermann Vitt, Klaus Hartfelder
International Journal of Insect Morphology and Embryology, 1998
Juvenile hormone effect on DNA synthesis and apoptosis in caste-specific differentiation of the larval honey bee (Apis mellifera L.) ovary
Ines C.Schmidt Capella, Klaus Hartfelder
Journal of Insect Physiology, 1998
In vitro biosynthesis of juvenile hormone in larval honey bees: Comparison of six media
Anna Rachinsky, Klaus Hartfelder
In Vitro Cellular and Developmental Biology Animal, 1998
Social insect polymorphism: hormonal regulation of plasticity in development and reproduction in the honeybee.
Klaus Hartfelder, Wolf Engels
Current Topics in Developmental Biology, 1998
The stomatogastric nervous system of the honey bee (Apis mellifera) in a critical phase of caste development
Isabel C. Boleli, Zilá Luz Paulino Simões, Klaus Hartfelder
Journal of Morphology, 1998
Caste determination is a sequential process: Effect of larval age at grafting on ovariole number, hind leg size and cephalic volatiles in the honey bee (Apis mellifera carnica)
Selim Dedej, Klaus Hartfelder, Pia Aumeier, Peter Rosenkranz, Wolf Engels
Journal of Apicultural Research, 1998
Relationship of the neutral sterols and ecdysteroids of the parasitic mite, Varroa jacobsoni to those of the honey bee, Apis mellifera
M.F Feldlaufer, K Hartfelder
Journal of Insect Physiology, 1997
Germ cell cluster formation and cell death are alternatives in caste-specific differentiation of the larval honey bee ovary
KLAUS HARTFELDER, GÜNTHER STEINBRÜCK
Invertebrate Reproduction and Development, 1997
Occurrence of a prothoracicotropic hormone-like peptide in the developing nervous system of the honey bee (Apis mellifera L)
Z. L. Paulino Simões, I. C. Boleli, K. Hartfelder
Apidologie, 1997
Serotonin-like immunoreactivity in the central nervous and neuroendocrine system of honey bee (Apis mellifera) larvae and pupae
Zoology, 1995
Ecdysteroid-dependent protein synthesis in caste-specific development of the larval honey bee ovary
Klaus Hartfelder, Konstanze K�stlin, Christine Hepperle
Roux S Archives of Developmental Biology, 1995
Diapause-dependent changes in prothoracicotropic hormone-producing neurons of the tobacco hornworm, Manduca sexta
Klaus Hartfelder, Wilma K. Hanton, Walter E. Bollenbacher
Cell and Tissue Research, 1994
Sex-specific developmental profiles of juvenile hormone synthesis in honey bee larvae
Klaus Hartfelder, Sibele Oliveira Tozetto, Anna Rachinsky
Roux S Archives of Developmental Biology, 1993
Structure and function of the prothoracic gland in honey bee (Apis mellifera l.) development
KLAUS HARTFELDER
Invertebrate Reproduction and Development, 1993
Allometric and multivariate analysis of sex and caste polymorphism in the neotropical stingless bee, Scaptotrigona postica
K. Hartfelder, W. Engels
Insectes Sociaux, 1992
Caste-specific modulation of juvenile hormone III content and ecdysteroid titer in postembryonic development of the stingless bee, Scaptotrigona postica depilis
Klaus Hartfelder, Heinz Rembold
Journal of Comparative Physiology B, 1991
Differential production of juvenile hormone and its desoxy precursor by corpora allata of honeybees during a critical period of caste development
A. Rachinsky, K. Hartfelder
Naturwissenschaften, 1991
Corpora allata activity, a prime regulating element for caste-specific juvenile hormone titre in honey bee larvae (Apis mellifera carnica)
Anna Rachinsky, Klaus Hartfelder
Journal of Insect Physiology, 1990
Caste and metamorphosis: Hemolymph titers of juvenile hormone and ecdysteroids in last instar honeybee larvae
Anna Rachinsky, Colette Strambi, Alain Strambi, Klaus Hartfelder
General and Comparative Endocrinology, 1990
The composition of larval food in stingless bees: Evaluating nutritional balance by Chemosystematic methods
K. Hartfelder, W. Engels
Insectes Sociaux, 1989
Rates of juvenile hormone synthesis control caste differentiation in the stingless bee Scaptotrigona postica depilis
Klaus H. Hartfelder
Roux S Archives of Developmental Biology, 1987

Klaus Hartmann Hartfelder

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