NEW OCCURRENCES OF LATE PALEOZOIC SEEDS IN THE PALEOVALLEY OF MARIANA PIMENTEL, RIO GRANDE DO SUL: TAXONOMY, DISPERSAL SYNDROMES AND BIOSTRATIGRAPHY Raul dos Santos Prado, Juliane Marques-de-Souza, Roberto Iannuzzi Revista Brasileira De Paleontologia, 2025 Seeds are crucial for understanding plant life cycles and environmental adaptation. This study analyzed fossil seeds from the Cocuruto outcrop (upper Itararé Group, Paraná Basin) in the Mariana Pimentel (MP) Paleovalley, identifying three genera: Cordaicarpus, Cornucarpus, and Samaropsis. A new species, Samaropsis sulriograndensis sp. nov., was erected, along with occurrences of Cordaicarpus cerronegrensis, C. brasilianus, C. truncatus, Samaropsis moreirana, S. kurtzii, and S. seixasii. Cornucarpus was identified only at the genus level. The diagnosis of Samaropsis seixasii was emended. The dispersal syndrome of each species was proposed based on size, volume, and the presence of dispersal features, with anemochory and barochory being the most common. Notably, Cordaicarpus brasilianus showed a clear affinity with glossopterids, found in connection to Arberia-type fructifications. The stratigraphic ranges of these species in the MP Paleovalley were established for the first time, highlighting S. kurtzii as a key taxon for long-distance biostratigraphy in the latest Gzhelian–earliest Asselian interval. Keywords: seed taxonomy, dispersal syndromes, phytostratigraphy, Paraná Basin, Carboniferous–Permian transition.
FIRST RECORD OF PLANT MACROFOSSIL FROM THE BOA VISTA FORMATION, TAKUTU BASIN, RORAIMA STATE, BRAZIL Daisy Alves Oliva, Juliane Marques-de-Souza, Roberto Iannuzzi, Fábio Luiz Wankler Revista Brasileira De Paleontologia, 2022 Clayey intraclasts containing leaves preserved as impressions and compressions were collected from the Takutu River channel in the State of Roraima, Brazil. In the present study, 23 leaf fragments are described (morphologically and anatomically) and their taxonomic identity is proposed. These fossiliferous intraclasts were suggested in previous studies as coming from the Boa Vista Formation (Upper Pleistocene–Holocene). With the aim of finding new evidence to support this correlation, X-ray diffractometry (XRD) and Laser induced-breakdown spectroscopy (LIBS) analysis were performed, comparing the fossiliferous sample with two outcrops from the Boa Vista Formation. The results evidenced the chemical and mineralogical similarity between the fossiliferous intraclasts and both outcrops, suggesting their correlation with the Boa Vista Formation. Taxonomically, the specimens were recognized as fossil representatives of Dilleniaceae Salisb., Byrsonima Rich. ex Kunth (Malpighiaceae), Zanthoxylum L. (Rutaceae), and other six morphotypes. These taxa represent typical elements of the savanna (lavrados) of Roraima. The anatomical-cutillary characters of the mummified leaves indicate the dominance of xeromorphic plants, similar to the predominant woody species in the “lavrado” today, thus suggesting the same climatic-environmental conditions. Keywords: fossil leaves, leaf architecture, cuticular anatomy, angiosperm, Cenozoic.
The perceived landscape in the pulsar of the sacaí environmental complex, Baixo rio Branco, Roraima, Brazil Thiago José Costa Alves, Sandra do Nascimento Noda, Juliane Marques de Souza Sustentabilidade Em Debate, 2018 Os agroecossistemas amazônicos são parte de uma estrutura complexa, a Amazônia, e apresentam estruturas têmporo-espaciais diretamente relacionadas ao ambiente vivificado e ao saber imaterial dos agricultores. Este estudo teve por objetivo a compreensão do movimento de conservação da autopoiese da vida no Complexo Ambiental Sacaí, Caracaraí, Roraima, Brasil, a partir dos processos antitéticos de delineamento têmporo-espacial do pulso das águas, manifestos a partir das paisagens de seca e de cheia. O fluir do Complexo Ambiental Sacaí traz consigo temporalidade e espacialidade, as quais podem ser reveladas a partir das diversas visões de mundo sobre as unidades de paisagem. Apesar de se mostrarem de forma concreta, essas unidades de paisagem somente são possíveis de serem acessadas desde o caminho imaterial, resultado do vivificado. Foram utilizados como instrumentos de coleta de dados, entrevista com roteiro prévio, mapa de recursos naturais e reuniões espontâneas de validação nas varandas (Revv).
Revaluation of the Samaropsis mendesii Rigby, 1972 from Paraná Basin lower Permian Juliane Marques-de-Souza, Roberto Iannuzzi Geologia USP Serie Cientifica, 2016 This paper suggests an emendation to the diagnosis of Samaropsis mendesii Rigby, 1972 (Rio Bonito Formation, Santa Catarina State, Paraná Basin) on the basis of which the Samaropsis gigas Marques-de-Souza et Iannuzzi 2007 comes to be considered a junior synonym of this species. Adding the specimens previously considered as S. gigas from the Rio Grande do Sul State, the stratigraphic range of S. mendesii is extended to the uppermost portion of the Itararé Group. Also, we provide a comparative analysis with the closest Indian species Otofeista milleri (Feistmantel) Pant et al. (1985) (Karharbari beds). The comparison of the S. mendesii with the Indian material pointed to a strong morphometric correspondence between both, highlighting the potentiality of the use of this seed form in stratigraphic correlations due to the peculiarity of the morphology and the abundance of these seeds in Cisuralian (Sakmarian-Artinskian) strata of Gondwana.
Iron and calcium content of edible plants in non conventional family Solanaceae: A comparative analysis Periodico Tche Quimica, 2016
Dispersal syndromes of fossil seeds from the Lower Permian of Paraná Basin, Rio Grande do Sul, Brazil Juliane M. Souza, Roberto Iannuzzi Anais Da Academia Brasileira De Ciencias, 2012 The morphological analysis of seeds has been an important subject in modern ecological studies, once it provides evidence about the biology and adaptations of the parent plant. However, this kind of study has been restricted to the ecology of modern plants and is rarely used in interpretations of Paleozoic data. From the understanding of dispersal syndromes analysis as an important tool to paleoecological reconstruction, this study provides a first approach using this tool with seeds from the Lower Permian strata of southern Paraná Basin in Rio Grande do Sul. Based on previously classified seeds and using their biological and taphonomic data, the syndrome of dispersal was interpreted, and their placement in successional groups (pioneer, early-successional and later-successional) was suggested. Seven morphospecies were analyzed: Samaropsis gigas, representing a later-successional species living in water bodies with hydrochory as its dispersal syndrome; Samaropsis kurtzii, typical of early-successional species showing anemochory as its dispersal syndrome and living in distal areas in relation to water bodies; Samaropsis aff. S. millaniana, Cordaicarpus aff. C. brasilianus, Cordaicarpus cerronegrensis and Cordaicarpus truncata have typical characteristics of pioneer plants, exhibiting barochory as their primary dispersal syndrome with other syndromes associated.
