@article {7724, title = {New taxonomic and phylogeographic data on three nominal species of the genus Septaria F{\'e}russac, 1807 (Gastropoda: Cycloneritida: Neritidae)}, journal = {Zootaxa}, volume = {4915}, year = {2021}, month = {Jan-20-2021}, pages = {28 - 40}, abstract = {Due to superficial morphological similarities, there is often confusion in the identification of some species of the genus Septaria. A combined analysis of the genital anatomy, morphometric and DNA, based on a portion of the COI gene, applied to three nominal species of this genus, confirmed the validity of Septaria tahitiana Eichhorst, 2016, and suggested that Septaria borbonica (Bory de Saint Vincent, 1804) is a subspecies of Septaria porcellana (Linnaeus, 1758), both taxa with disjunct distribution areas: Septaria borbonica in the western Indian Ocean and Septaria porcellana the western Pacific and eastern Indian Oceans. The possible presence of Septaria tesselata (Lamarck, 1816) in Mayotte (Comoros Archipelago) needs to be confirmed.}, keywords = {Indo-Pacific, mitochondrial DNA, mollusc, Phylogeny, shell morphometrics, taxonomy}, issn = {1175-5326}, doi = {10.11646/zootaxa.4915.110.11646/zootaxa.4915.1.2}, url = {https://www.biotaxa.org/Zootaxa/issue/view/zootaxa.4915.1}, author = {Ahmed Abdou} } @article {7046, title = {Disentangling the taxonomy of the subfamily Rasborinae (Cypriniformes, Danionidae) in Sundaland using DNA barcodes}, journal = {Scientific Reports}, volume = {10}, year = {2020}, month = {Jan-12-2020}, abstract = {iodiversity hotspots have provided useful geographic proxies for conservation efforts. Delineated from a few groups of animals and plants, biodiversity hotspots do not reflect the conservation status of freshwater fishes. With hundreds of new species described on a yearly basis, fishes constitute the most poorly known group of vertebrates. This situation urges for an acceleration of the fish species inventory through fast and reliable molecular tools such as DNA barcoding. The present study focuses on the freshwater fishes diversity in the Sundaland biodiversity hotspot in Southeast Asia. Recent studies evidenced large taxonomic gaps as well as unexpectedly high levels of cryptic diversity, particularly so in the islands of Java and Bali. The Cypriniformes genera Rasbora and Nemacheilus account for most of the endemic species in Java and Bali, however their taxonomy is plagued by confusion about species identity and distribution. This study examines the taxonomic status of the Rasbora and Nemacheilus species in Java, Bali and Lombok islands through DNA barcodes, with the objective to resolve taxonomic confusion and identify trends in genetic diversity that can be further used for conservation matters. Several species delimitation methods based on DNA sequences were used and confirmed the status of most species, however several cases of taxonomic confusion and two new taxa are detected. Mitochondrial sequences argue that most species range distributions currently reported in the literature are inflated due to erroneous population assignments to the species level, and further highlight the sensitive conservation status of most Rasbora and Nemacheilus species on the islands of Java, Bali and Lombok.}, keywords = {Conservation genetics, Cryptic diversity, Population fragmentation, Southeast Asia, taxonomy}, doi = {10.1038/s41598-020-59544-9}, url = {http://www.nature.com/articles/s41598-020-59544-9}, author = {Sholihah, Arni and Delrieu-Trottin, Erwan and Sukmono, Tedjo and Dahruddin, Hadi and Risdawati, Renny and Elvyra, Roza and Wibowo, Arif and Kustiati, Kustiati and Busson, Frederic and Sauri, Sopian and Nurhaman, Ujang and Dounias, Edmond and Zein, Muhamad Syamsul Arifin and Fitriana, Yuli and Utama, Ilham Vemendra and Muchlisin, Zainal Abidin and Agn{\`e}se, Jean-Fran{\c c}ois and Hanner, Robert and Wowor, Daisy and Steinke, Dirk and Philippe Keith and R{\"u}ber, Lukas and Hubert, Nicolas} } @article {5930, title = {The complex study of complexes: The first well-supported phylogeny of two species complexes within genus Caridina (Decapoda: Caridea: Atyidae) sheds light on evolution, biogeography, and habitat}, journal = {Molecular Phylogenetics and Evolution}, volume = {131}, year = {2019}, pages = {164-180}, abstract = {

Atyid shrimps, a key component of tropical freshwater ecosystems, face multiple anthropogenic threats and thus

need special attention. With more than 300 described species, the genus Caridina is the most speciose of all the

Caridea infra-order. Caridina spp. occupy diverse habitats in tropical freshwaters of the Indo-West Pacific region.

Several species complexes have been recognized, based on common morphological features, but little is known

about how well these morphological characteristics align with phylogenetic characteristics. Furthermore, no

phylogeny of the genus Caridina published so far has provided well-resolved and supported relationships among

different species, thus impeding the possibility of proposing evolutionary hypotheses. In this study we used next

generation sequencing (NGS) to provide new insights into the phylogenetic relationships among the genus

Caridina, focusing on two complexes: {\textquoteleft}Caridina nilotica{\textquoteright} and {\textquoteleft}Caridina weberi{\textquoteright}. We collected 92 specimens belonging

to these two groups from most of their known geographical range, representing 50 species, for which we

sequenced seven mitochondrial genes and two nuclear markers using ion torrent NGS. We performed a phylogenetic

analysis, which yielded the first well-supported tree for the genus Caridina. On this tree were mapped the

geographic ranges and the habitats used by the different species, and a time calibration was tested. We found the

driving factors that most likely account for separation of clades are differences in habitat and to a lesser extent

geography. This work provides new insights into the taxonomy of this group and identifies opportunities for

further studies in order to fill knowledge gaps that currently impede the management and conservation of atyid

species.

1. Introduction

}, keywords = {amphidromy, freshwater shrimp, Indo-Pacific, Mitochondrial genome, Molecular systematics, taxonomy}, author = {de Mazancourt, Valentin and Klotz, Werner and Marquet, G{\'e}rard and Mos, B and Rogers, C and Philippe Keith} } @article {6038, title = {Mastiglanis durantoni from French Guyana, a second species in the genus (Siluriformes: Heptapteridae), with a CT scan survey of phylogenetically-relevant characters}, journal = {Cybium}, volume = {43}, year = {2019}, pages = {125-135}, abstract = {

A new species of the heptapterid genus Mastiglanis, M. durantoni, is described from three adjacent localities in the upper reaches of the Maroni River in French Guyana. The new species is distinguished from the only other known species in the genus, M. asopos, by several qualitative and quantitative characteristics, such as the slender caudal peduncle (caudal peduncle depth 4.3-5.3\% of SL vs. 5.6-6.3\%); the upper jaw protruding markedly beyond lower, resulting in long snout (36.5-42.0\% of HL vs. 23.4-33.6\%); the head depressed (head depth 34.0-44.4\% of HL vs. 44.4-53.0\%); the procurrent caudal fin rays 12 dorsally and ventrally (vs. 14-17); the dorsal margin of adipose fin concave (vs. variably convex, straight or gently sinusoidal); the occipital process deeply notched, distally V-shaped (vs. distal margin of occipital process variably-shaped, with notch, when present, not deep and forming an obtuse angle); the mesethmoid cornu widest at its midlength (vs. gradually narrower from base to tip). Characters of taxonomic and phylogenetic relevance are observed and illustrated with CT-scan imaging technique. The narrowly endemic and outlying geographical distribution of the new species contrasts with the extremely wide range of M. asopos and suggests a history of peripheral isolation and differentiation. In conformity with that interpretation, the new species has some autapomorphic specializations, while none is currently known for M. asopos.

}, keywords = {catfish, Heptapteridae, Metaspecies, Neotropical, New species, Systematics, taxonomy}, doi = {https://doi.org/10.26028/cybium/2019-423-002}, author = {Pinna de, M and Philippe Keith} } @article {7041, title = {Revisiting species boundaries and distribution ranges of Nemacheilus spp. (Cypriniformes: Nemacheilidae) and Rasbora spp. (Cypriniformes: Cyprinidae) in Java, Bali and Lombok through DNA barcodes: implications for conservation in a biodiversity hotspot}, journal = {Conservation Genetics}, volume = {20}, year = {2019}, month = {Jan-06-2019}, pages = {517 - 529}, abstract = {Biodiversity hotspots have provided useful geographic proxies for conservation efforts. Delineated from a few groups of animals and plants, biodiversity hotspots do not reflect the conservation status of freshwater fishes. With hundreds of new species described on a yearly basis, fishes constitute the most poorly known group of vertebrates. This situation urges for an acceleration of the fish species inventory through fast and reliable molecular tools such as DNA barcoding. The present study focuses on the freshwater fishes diversity in the Sundaland biodiversity hotspot in Southeast Asia. Recent studies evidenced large taxonomic gaps as well as unexpectedly high levels of cryptic diversity, particularly so in the islands of Java and Bali. The Cypriniformes genera Rasbora and Nemacheilus account for most of the endemic species in Java and Bali, however their taxonomy is plagued by confusion about species identity and distribution. This study examines the taxonomic status of the Rasbora and Nemacheilus species in Java, Bali and Lombok islands through DNA barcodes, with the objective to resolve taxonomic confusion and identify trends in genetic diversity that can be further used for conservation matters. Several species delimitation methods based on DNA sequences were used and confirmed the status of most species, however several cases of taxonomic confusion and two new taxa are detected. Mitochondrial sequences argue that most species range distributions currently reported in the literature are inflated due to erroneous population assignments to the species level, and further highlight the sensitive conservation status of most Rasbora and Nemacheilus species on the islands of Java, Bali and Lombok.}, keywords = {Conservation genetics, Cryptic diversity, Population fragmentation, Southeast Asia, taxonomy}, issn = {1566-0621}, doi = {10.1007/s10592-019-01152-w}, url = {http://link.springer.com/10.1007/s10592-019-01152-w}, author = {Hubert, Nicolas and Lumbantobing, Daniel and Sholihah, Arni and Dahruddin, Hadi and Delrieu-Trottin, Erwan and Busson, Frederic and Sauri, Sopian and Hadiaty, Renny and Philippe Keith} } @article {5023, title = {The {\textquotedblleft}Pinocchio-shrimp effect{\textquotedblright}: first evidence of variation in rostrum length with the environment in Caridina H. Milne-Edwards, 1837 (Decapoda: Caridea: Atyidae)}, journal = {Journal of Crustacean Biology}, volume = {37}, year = {2017}, month = {05/2017}, pages = {243-248}, abstract = {

External morphology has always been the first criterion used to separate species of shrimps,

especially in the freshwater genus Caridina H. Milne-Edwards, 1837, but more doubts have been

expressed regarding the relevance of some of the morphological characters. We collected 27

specimens of Caridina from seven different localities during field work conducted on the island

of Pohnpei (Federated States of Micronesia). After genetic verification that they all belonged to

the same species, 19 morphological variables were measured and correlated with the elevation

of the collecting stations using correlation analyses. We provide evidence that the length of the

rostrum showed strong negative correlation with the elevation. This could be explained either

by the physical stress exerted on the rostrum by the stronger water currents in the stations at a

higher elevation, as a defence against predators in the lower stations, or a combination of both

possibilities. The taxonomy of these shrimps is thus challenging and should not rely only on

rostrum length, but on other characters such as the number of teeth on the dorsal margin of

the carapace, which is not correlated with rostrum length and therefore, with the environment.

}, keywords = {correlation analysis, effect of elevation, freshwater shrimps, Micronesia, morphology, taxonomy}, author = {de Mazancourt, Valentin and Marquet, G{\'e}rard and Philippe Keith} }