Aulopareia caerulostellata, a new gobiid species (Teleostei: Gobiidae) from the Strait of Malacca Yu Yang Tan, Sébastien Lavoué, Md Zain Khaironizam Journal of Fish Biology, 2026 Aulopareia caerulostellata sp. nov. (Teleostei: Gobiidae) is described based on 21 specimens (32.3–70.2 mm SL) collected from the Strait of Malacca near Penang Island, Malaysia. Aulopareia caerulostellata is described by the following combination of characters: second dorsal fin I,10; anal fin I,9; pectoral fin rays 17–18; segmented caudal fin 16, in 9/7 pattern; lateral scales 28–30; transverse scale counts backward (TRB) usually 9–10; predorsal scales 0–6; cheek and opercle naked; 3–5 irregular rows of rounded bluish spots on lateral side above midline, less aligned in females and juveniles. Aulopareia caerulostellata is mostly similar to its sympatric congener Aulopareia cyanomos (Bleeker 1849). However, A. caerulostellata can be distinguished from the latter by six or less predorsal scales (versus 10 or more), 3–5 irregular rows of iridescent bluish spots along side (versus 6–8 longitudinal rows of spots), spots never overlapped with brown blotches along midline (versus occasionally overlapped). The minimum cytochrome oxidase subunit I‐based genetic distance between the two species is 11.8%.
Integrative taxonomy of the featherback fish genus Chitala (Osteoglossomorpha: Notopteridae) in Peninsular Malaysia Luqman Hakim Ruzman, Jamsari Amirul Firdaus Jamaluddin, Abdullah Halim Muhammad‐Rasul, Tedjo Sukmono, Md. Zain Khaironizam, et al. Zoologica Scripta, 2024 The taxonomy of the freshwater featherback fish genus Chitala (Osteoglossomorpha: Notopteridae) remains unsettled because delimiting and naming Chitala species based solely on morphology led to different hypotheses. In this study, we aim to determine the number and identity of Chitala species present in Peninsular Malaysia by employing an integrative taxonomic approach that combines morphology and two mitochondrial markers: the cytochrome c oxidase subunit I (COI) and cytochrome b genes. A total of 60 specimens of Chitala were collected throughout Peninsular Malaysia. Initially, all specimens were sorted into three distinct categories based on their body marking patterns. A molecular phylogenetic analysis revealed that each of these groups was monophyletic, and an automated species partition method further recognized them as distinct species. These results support the presence of three Chitala species in Peninsular Malaysia, even though a multivariate morphometric analysis failed to fully differentiate each of these three species. Comparison with original species descriptions and genetic data from an additional 70 Chitala specimens from neighbouring regions allowed us to name these species as Chitala lopis, Chitala borneensis, and Chitala ornata. We also showed the presence of two undescribed species in Indonesia.
A Preliminary Checklist of Fish Species in the Peat Swamp Forest of Ayer Hitam Utara State Park Forest, Johor, Malaysia Muhammad Fahmi-Ahmad, Muhammad Rasul Abdullah Halim, Mohd Lokman Ilham-Norhakim, Muhammad Nur Azam Arshad, Zahar Azuar Zakaria, et al. Pertanika Journal of Tropical Agricultural Science, 2024 Ayer Hitam Utara State Park Forest (AHUSPF) is an invaluable sanctuary in Johor, the last remaining intact peat swamp forest reserve that hosts many species unique to this distinctive habitat. Some rapid surveys conducted from 2019 to 2022 recorded 40 species of freshwater fish within AHUSPF. Notably, 11 are stenotopic to acid blackwater, and 12 are stenotopic to acid water, most belonging to the family Osphronemidae and Danionidae. The International Union for Conservation of Nature Red List has designated two species, Encheloclarias curtisoma and Betta persephone, as Endangered, while Betta omega is classified as Critically Endangered. The checklist presented herein was first produced from an inventory study in AHUSPF. The preservation of peat swamp forests in the area is under imminent threat due to the alarming rate of land conversion, forest fires, and the recent potential threat from the red-claw crayfish invasion in the aquatic environment. Hence, continuous monitoring is vital for documenting and updating the conservation status of the fish species. These endeavours will facilitate the development of practical conservation approaches to ensure the long-term sustainability of AHUSPF and its associated species.
Mitochondrial evidence on the phylogenetic position of the Southeast Asian catfish genus Encheloclarias Myers, 1937 (Actinopterygii: Siluriformes: Clariidae): Evolutionary and conservation implications Sébastien Lavoué, Jamsari Amirul Firdaus Jamaluddin, Abdullah Halim Muhammad-Rasul, Mohd Lokman Ilham-Norhakim, Khaironizam Md Zain Acta Ichthyologica Et Piscatoria, 2024 The phylogenetic position of the Southeast Asian catfish genus Encheloclarias Myers, 1937 within the family Clariidae is inferred herein using three mitochondrial nucleotide markers: cytochrome b, cytochrome oxidase subunit I, and 16S rRNA genes. We found that Encheloclarias is neither exclusively related to the African taxa having extended neural spines posterior to the dorsal fin (Encheloclarias shares with some of these taxa the presence of an adipose fin, as opposed to absent in all other clariid taxa) nor to the Asian species of the genus Clarias Scopoli, 1777. Encheloclarias is hypothesized to be the sister group of all other clariids, except Horaglanis Menon, 1951. The inferred position of Encheloclarias confirms that the adipose fin in this genus has an evolutionary origin independent to that of the adipose fin found in some African clariids. Encheloclarias is not only ecologically remarkable, being adapted to acidic peat swamps in Southeast Asia, but it is also an ancient lineage sheltering in these habitats. However, the precise timing of the colonization of peat swamps by Encheloclarias remains to be investigated. The phylogenetic position of Encheloclarias further underscores the importance of studying and protecting the remaining peat swamp habitats in Southeast Asia and their distinctive aquatic fauna.
An Odyssey of Integrative Taxonomy Unveils Marine Fish Diversity, New Records and Cryptic Species in Malaysian Waters Zoological Studies, 2024
DIVERSITY AND SPATIAL VARIATION OF SHRIMP ASSEMBLAGES IN A MANGROVE ESTUARY OF MALAYSIA M. Abd-Hamid, N.I.A. Ab-Doroh, I. Idris, K. Md-Zain, S.A. Mohd-Nor, et al. Vie Et Milieu, 2023 Among invertebrates living in estuarine ecosystems, shrimps are highly sought after as protein sources by humans and other organisms. Shrimps have a short life cycle and spend critical life stages in estuarine systems. Thus, changes in estuarine environmental parameters could influence shrimp distribution and abundance. This research aimed to determine ecological parameters that influence shrimp diversity in Merbok estuary, a mangrove hotspot area located in the northwest of Peninsular Malaysia. Six water quality parameters (temperature, salinity, conductivity, pH, turbidity, and dissolved oxygen) were recorded at three zones (upper, middle, and lower) along the estuary from September 2012 to March 2013. Shrimps were sampled using barrier and stake nets. Three water parameters showed significant differences among the sampling zones (p < 0.05) including salinity, conductivity, and pH. A total of nine species of shrimps from three families (Penaeidae, Palaemonidae, and Alpheidae) were identified, with Penaeus merguiensis being the dominant species in each zone. The species composition showed no significant differences among zones. The middle zone had the highest diversity index, attributed to its stable environmental condition, resulting from the mixture of polyhaline and mesohaline sea nutrient sources. Shrimp abundance was negatively correlated with temperature, conductivity, and pH, suggesting these as determinant factors for the assemblage.
Low morphological and genetic variation within the glass-perchlet Parambassis siamensis (Teleostei: Ambassidae) in Peninsular Malaysia SITI ZAFIRAH GHAZALI, SÉBASTIEN LAVOUÉ, KHAIRONIZAM MD. ZAIN, JAMSARI AMIRUL FIRDAUS JAMALUDDIN, AMIRRUDIN AHMAD, et al. Zootaxa, 2022 We compare several populations of the glass-perchlet Parambassis siamensis (Fowler 1937) (Teleostei: Ambassidae) sampled throughout Peninsular Malaysia to determine their degree of differentiation, using both morphological and molecular characters. Our morphological analyses do not show evidence for the presence of more than one species, with the range of morphometric and meristic characters overlapping among populations. Our genetic analysis using partial sequences of the mitochondrial gene coding for the protein cytochrome c oxidase I (COI) reveals the existence of two clades that diverge from each other by a minimum uncorrected p-distance of 2.2%. The first clade comprises of specimens from south-eastern Peninsular Malaysia (Pahang and Endau-Rompin River basins) along with those from Cambodia (lower Mekong River). The second clade comprises of specimens from western Peninsular Malaysia (Selangor, Kurau, Perak, Muda and Kerian River basins) and north-eastern Peninsular Malaysia (Terengganu River basin), along with those from Chao Phraya River basin nearby Bangkok (type locality of P. siamensis). The presence of specimens with numerous melanophores on body sides in each of these two clades indicates that body marking pattern is not a valuable taxonomic character. This finding supports the conclusion that Chanda punctulata Fraser-Brunner 1955 is a junior synonym of P. siamensis. Altogether, our results support the hypothesis that all populations of P. siamensis in Peninsular Malaysia (along those from Chao Phraya and lower Mekong basins) are conspecific, comprising two genetically distinct, although close lineages. We further discuss the phenotypic plasticity within P. siamensis in relation to lotic and lentic habitats. Finally, we briefly discuss some implications for biogeography and possible causes explaining the distribution pattern.
To lump, to split or to maintain? Molecular taxonomy of the spotted barb Barbodes binotatus (Cyprinidae) and closely related species in Peninsular Malaysia Noor Zahidah Ahmad Sobri, Sébastien Lavoué, Fazimah Aziz, Siti Azizah Mohd Nor, Noor Adelyna Mohammed Akib, et al. Journal of Fish Biology, 2021 The taxonomic status of the Southeast Asian spotted barb, Barbodes binotatus (Teleostei: Cyprinidae) has puzzled researchers due to large but inconsistent geographic variation of its body melanin marking pattern. In this study, we appraise the differentiation of Barbodes binotatus and two closely related species, Barbodes rhombeus and saddle barb, Barbodes banksi, in Peninsular Malaysia using mitochondrial and nuclear markers. Our results reveal that the Peninsular Malaysia populations of each of the three species form largely reciprocal monophyletic lineages that differ from each other by a minimum of 2.3% p-genetic distance using COI gene. However, specimens of B. binotatus in Peninsular Malaysia are only distantly related to specimens of B. binotatus in Java (type locality). The monophyly of B. banksi is not refuted although specimens of Peninsular Malaysia are genetically distinct from those of Sarawak (type locality). We discuss alternative hypotheses whether each of these three valid species is a single species or each of the main five genetic lineages revealed in this study represents a distinct species. Preliminary investigations reveal a mito-nuclear discordance at one locality in Peninsular Malaysia where B. binotatus and B. banksi co-occur. Further studies should inform on the extent of reproductive porousness between these two lineages and others. This article is protected by copyright. All rights reserved.
Length-weight relationship and relative condition factor of fishes in the tributaries of Muda reservoir, Ulu Muda Forest Reserve, Kedah, Peninsular Malaysia Malayan Nature Journal, 2021
New Distribution Records of Eugnathogobius Illotus (Gobiiformes) from Peninsular Malaysia and Molecular Insight into the Species YY Tan, R Koreeda, YG Seah, H Motomura, MZ Khaironizam Thalassas: An International Journal of Marine Sciences 42 (1), 21 , 2026 2026
Gobioid fishes (Teleostei, Gobiiformes) of Penang Island, Malaysia: a comprehensive inventory with new records for Peninsular Malaysia YUY TAN, S LAVOUÉ, MDZ KHAIRONIZAM Zootaxa 5760 (2), 151-188 , 2026 2026
Using citizen science data to uncover the invasion of the non-native fish, Hemibagrus wyckioides (Fang and Chaux, 1949) in Peninsular Malaysia M Aqmal-Naser, IFA Ghani, MRA Halim, M Fahmi-Ahmad, ... Biological Invasions 26 (11), 3547-3553 , 2024 2024 Citations: 3
Integrative taxonomy of the featherback fish genus Chitala (Osteoglossomorpha: Notopteridae) in Peninsular Malaysia LH Ruzman, JAF Jamaluddin, AH Muhammad‐Rasul, T Sukmono, ... Zoologica Scripta 53 (5), 523-540 , 2024 2024 Citations: 2
Pleistocene paleodrainages explain the phylogeographic structure of Malaysian populations of Asian arowana better than their chromatic variation NFMAH Alshari, S Lavoué, MAM Sulaiman, MZ Khaironizam, SAM Nor, ... Endangered Species Research 46, 205-214 , 2021 2021 Citations: 9
To lump, to split or to maintain? Molecular taxonomy of the spotted barb Barbodes binotatus (Cyprinidae) and closely related species in Peninsular Malaysia NZ Ahmad Sobri, S Lavoué, F Aziz, SA Mohd Nor, NA Mohammed Akib, ... Journal of fish biology 99 (2), 656-668 , 2021 2021 Citations: 9
Genetic variation, demographic history and phylogeography of tire track eel, Mastacembelus favus (Synbranchiformes: Mastacembelidae) in Southeast Asia JAF Jamaluddin, N So, BM Tam, A Ahmad, C Grudpan, LM Page, ... Hydrobiologia 838 (1), 163-182 , 2019 2019 Citations: 18
Provisional checklist of freshwater fish diversity and distribution in Perak, Malaysia, and some latest taxonomic concerns CKC Ng, TY Lim, AB Ahmad, MZ Khaironizam Zootaxa 4567 (3), 515–545-515–545 , 2019 2019 Citations: 25
Length-weight relationships, condition factor and growth parameters of Periophthalmus chrysospilos (Bleeker, 1852)(Gobiiformes: Gobiidae) in Bayan Bay, Penang, Malaysia MIC Abdullah, KM Zain Sains Malaysiana 48 (2), 271-279 , 2019 2019 Citations: 24
Fishes of the freshwater ecosystems of Peninsular Malaysia M Zakaria-Ismail, A Fatimah, MZ Khaironizam LAP Lambert Academic Publishing , 2019 2019 Citations: 37
Ichthyofaunal diversity of Sungai Gombak, Selangor, Peninsular Malaysia: Past and current knowledge. AH Nurul Fatinizzati, AS Noor Zahidah, AH Muhammad Rasul, ... Malayan Nature Journal 70 (4) , 2018 2018 Citations: 5
Taxonomic revision of the genus Poropuntius (teleostei: Cyprinidae) in Peninsular Malaysia AH Muhammad-Rasul, R Ramli, V Low, A Ahmad, C Grudpan, ... Zootaxa 4472 (2), 327-342 , 2018 2018 Citations: 7
Exploring hidden diversity in Southeast Asia’s Dermogenys spp. (Beloniformes: Zenarchopteridae) through DNA barcoding S Nurul Farhana, ZA Muchlisin, TY Duong, S Tanyaros, LM Page, Y Zhao, ... Scientific Reports 8 (1), 10787 , 2018 2018 Citations: 31
Length-weight relationship and relative condition factor of Liza subviridis (valenciennes, 1836) in pinang river estuary, balik pulau, Penang, Malaysia N Zolkhiflee, KM Zain, MY Hossain, K Yahya 2017 Citations: 6
Preliminary assessment on autecological studies of beardless barb, Cyclocheilichthys apogon (valenciennes, 1842) from Muda Reservoir of Kedah, Malaysia NAM Rosli, KM Zain Tropical life sciences research 27 (supp1), 63 , 2016 2016 Citations: 4
Cyprinid fishes of the genus Neolissochilus in Peninsular Malaysia MZ Khaironizam, M Akaria-Ismail, JW Armbruster Zootaxa 3962 (1), 139–157-139–157 , 2015 2015 Citations: 38
An annotated checklist of fish fauna of Bukit Merah Reservoir and its catchment area, Perak, Malaysia ZM Shafiq, MSAS Ruddin, HH Zarul, MM Syaiful, MZ Khaironizam, ... Check List 10 (4), 822-828 , 2014 2014 Citations: 13
Effects of freezing on sperm velocity in four different age groups of Jermasia buck. NH Hashida, MNK Nor Ashikin, MZ Khaironizam, RB Abdullah 2013 Citations: 6
Effects of freezing on sperm velocity in four different age groups of jermasia buck R Abdullah, MZ Khaironizam, NH Hashida, M Ashikin Indian Journal of Animal Research 47 (1) , 2013 2013
Spawning period and fecundity of Neolissochilus soroides (Duncker, 1904)(Pisces, Teleostei, Cyprinidae) from a small Malaysian stream MZ Khaironizam, MZ ISMAIL Turkish Journal of Zoology 37 (1), 65-72 , 2013 2013 Citations: 21
MOST CITED SCHOLAR PUBLICATIONS
Length-weight relationship of mudskippers (Gobiidae: Oxudercinae) in the coastal areas of Selangor, Malaysia MZ Khaironizam, Y Norma-Rashid Naga 25 (3/4), 20-22 , 2002 2002 Citations: 95
Trophic polymorphism in the Malaysian fish Neolissochilus soroides and other Old World Barbs (Teleostei, Cyprinidae) TR Roberts, MZ Khaironizam 2008 Citations: 53
Cyprinid fishes of the genus Neolissochilus in Peninsular Malaysia MZ Khaironizam, M Akaria-Ismail, JW Armbruster Zootaxa 3962 (1), 139–157-139–157 , 2015 2015 Citations: 38
Fishes of the freshwater ecosystems of Peninsular Malaysia M Zakaria-Ismail, A Fatimah, MZ Khaironizam LAP Lambert Academic Publishing , 2019 2019 Citations: 37
First record of the mudskipper, Periophthalmodon septemradiatus (Hamilton)(Teleostei: Gobiidae) from Peninsular Malaysia MZ Khaironizam, Y Norma-Rashid Raffles Bulletin of Zoology 51 (1), 97-100 , 2003 2003 Citations: 34
Exploring hidden diversity in Southeast Asia’s Dermogenys spp. (Beloniformes: Zenarchopteridae) through DNA barcoding S Nurul Farhana, ZA Muchlisin, TY Duong, S Tanyaros, LM Page, Y Zhao, ... Scientific Reports 8 (1), 10787 , 2018 2018 Citations: 31
Provisional checklist of freshwater fish diversity and distribution in Perak, Malaysia, and some latest taxonomic concerns CKC Ng, TY Lim, AB Ahmad, MZ Khaironizam Zootaxa 4567 (3), 515–545-515–545 , 2019 2019 Citations: 25
Length-weight relationships, condition factor and growth parameters of Periophthalmus chrysospilos (Bleeker, 1852)(Gobiiformes: Gobiidae) in Bayan Bay, Penang, Malaysia MIC Abdullah, KM Zain Sains Malaysiana 48 (2), 271-279 , 2019 2019 Citations: 24
Spawning period and fecundity of Neolissochilus soroides (Duncker, 1904)(Pisces, Teleostei, Cyprinidae) from a small Malaysian stream MZ Khaironizam, MZ ISMAIL Turkish Journal of Zoology 37 (1), 65-72 , 2013 2013 Citations: 21
A new record of the mudskipper Parapocryptes serperaster (Oxudercinae: Gobiidae) from Peninsular Malaysia MZ Khaironizam, Y Norma-Rashid Malaysian Journal of Science (MJS) 19 (1), 101-104 , 2000 2000 Citations: 20
Genetic variation, demographic history and phylogeography of tire track eel, Mastacembelus favus (Synbranchiformes: Mastacembelidae) in Southeast Asia JAF Jamaluddin, N So, BM Tam, A Ahmad, C Grudpan, LM Page, ... Hydrobiologia 838 (1), 163-182 , 2019 2019 Citations: 18
First record of Periophthalmus walailakae (Gobiidae: Oxudercinae) from Peninsular Malaysia G PolGar, MZ KhaironiZaM Cybium 32 (4), 349-351 , 2008 2008 Citations: 16
An annotated checklist of fish fauna of Bukit Merah Reservoir and its catchment area, Perak, Malaysia ZM Shafiq, MSAS Ruddin, HH Zarul, MM Syaiful, MZ Khaironizam, ... Check List 10 (4), 822-828 , 2014 2014 Citations: 13
Distribution of mudskippers (Gobiidae: Oxudercinae) on the Selangor coast MZ Khaironizam, N Rashid University of Malaya press , 2005 2005 Citations: 13
Pleistocene paleodrainages explain the phylogeographic structure of Malaysian populations of Asian arowana better than their chromatic variation NFMAH Alshari, S Lavoué, MAM Sulaiman, MZ Khaironizam, SAM Nor, ... Endangered Species Research 46, 205-214 , 2021 2021 Citations: 9
To lump, to split or to maintain? Molecular taxonomy of the spotted barb Barbodes binotatus (Cyprinidae) and closely related species in Peninsular Malaysia NZ Ahmad Sobri, S Lavoué, F Aziz, SA Mohd Nor, NA Mohammed Akib, ... Journal of fish biology 99 (2), 656-668 , 2021 2021 Citations: 9
Assessment of the freshwater fisheries in Ulu Muda, Kedah, Malaysia KY Lee, A Shah, MZ Khaironizam Petaling Jaya, Selangor: WWF-Malaysia , 2013 2013 Citations: 9
Butterflies (Insecta: Lepidoptera) of the southwestern Endau-Rompin M Sofian-Azirun, M Khaironizam, Y Norma-Rashid, B Daicus The Forest and Biodiversity of Selai, Endau-Rompin, 169-175 , 2005 2005 Citations: 8
Taxonomic revision of the genus Poropuntius (teleostei: Cyprinidae) in Peninsular Malaysia AH Muhammad-Rasul, R Ramli, V Low, A Ahmad, C Grudpan, ... Zootaxa 4472 (2), 327-342 , 2018 2018 Citations: 7
A new record of mudskipper Periophthalmus spilotus (Gobiidae: Oxudercinae) from Selangor coast, Peninsular Malaysia MZ Khaironizam, Y Norma-Rashid Nat Hist Bull Siam Soc 50 (2), 245-250 , 2002 2002 Citations: 7