Discovery of an endemism hotspot of freshwater mussels (Bivalvia: Unionidae) in Assam, with a description of two new genera DOI
Ivan N. Bolotov, Jyotish Sonowal, Devid Kardong

et al.

Zoological Journal of the Linnean Society, Journal Year: 2024, Volume and Issue: unknown

Published: May 17, 2024

Abstract The Indian subcontinent houses a unique fauna of freshwater mussels. Tectonic and biogeographic reconstructions indicate that this represents derivative Mesozoic Gondwanan biota it arrived in Asia on the Plate, using tectonic block as ‘biotic ferry’. Though preliminary integrative revision Unionidae was published recently, level endemism taxonomic richness regional assemblages are unsatisfactorily known. Here, we revise taxonomy mussels from Brahmaputra River basin based large DNA-sequence morphological dataset sampled Assam, north-eastern India. We managed to collect sequence topotypes for nearly all nominal species described region, except Lamellidens friersoni Parreysia smaragdites. Our phylogenetic morphology-based research reveals assemblage contains nine species, belonging single subfamily, Parreysiinae. Seven three genera (Balwantia, Pseudoscabies Bolotov, Sonowal, Kardong, Pasupuleti Subba Rao gen. nov., Assamnaia nov.) appear be endemic indicating may represent an hotspot global significance. findings highlight region should considered high-priority area conservation management.

Language: Английский

Taxonomic revision of two species in the genus Ptychorhynchus Simpson, 1900 (Bivalvia: Unionidae: Gonideinae), with description of a new species DOI
Ruiwen Wu, Lili Liu, Liping Zhang

et al.

Invertebrate Systematics, Journal Year: 2024, Volume and Issue: 38(7)

Published: July 4, 2024

Accurate identification and precise classification of freshwater mussel species that are among the most threatened taxa in world, play a crucial role informing conservation management efforts for these organisms. However, due to variability shell morphology, relying solely on characteristics taxonomy poses significant challenges, thereby impeding effective planning management. The genus Ptychorhynchus Simpson, 1900 is one such group need study. We integrate molecular phylogeny, morphology soft-body anatomy examine denserugata (Haas, 1910) resupinatus (von Martens, 1902). COI barcoding data support clustering P. Nodularia douglasiae within single clade, shares diagnostic feature , i.e. knobs or bumps inner mantle surface excurrent aperture. Therefore, by integrating anatomical characteristics, we confirm nominal syn. nov. new synonym N. . multi-locus (COI + ND1 16S rRNA 18S 28S ) phylogeny mitochondrial phylogenomics transfer from newly elevated Cosmopseudodon stat. rev., as rev. still considered designated type species. also describe based integrative taxonomy, wenshanensis sp. comprehensive understanding diversity revised species, heteromorphism (=P. nov.), will serve foundation further scientific assessment strategies pertaining taxa. ZooBank: urn:lsid:zoobank.org:pub:E48968B1-DF0F-42AD-8F31-B8C95F23CE57.

Language: Английский

Citations

5
Diversity, morphology, and phylogeny of freshwater mussels of the genus Nodularia (Bivalvia: Unionidae) from China, with descriptions of four new species DOI
Ruiwen Wu, Lili Liu, Liping Zhang

et al.

Zoologica Scripta, Journal Year: 2024, Volume and Issue: 53(5), P. 594 - 613

Published: June 12, 2024

Abstract Freshwater bivalves (Bivalvia, Unionida) are one of the most threatened groups animals in world. Defining species boundaries and understanding phylogeny genetic diversity these is key to guiding their conservation management. However, presence significant phenotypic plasticity convergence within this group complicates delimitation. This includes freshwater mussel genus Nodularia , endemic East Asia, for which a comprehensive phylogenetic relationships remains elusive due inadequate sampling previous studies, particularly China, widely recognized biodiversity hotspot mussels. Here, we conduct taxonomic analyses based on extensive across 23 provinces China multiple data sources, including shell morphology, soft body anatomy, six‐gene (COI + ND1 16S 18S 28S histone H3) mitogenome datasets. The integrative systematics approach used here reveals 10 distinct genus, four new science, i.e. hanensis sp. nov., huana fusiformans dualobtusus nov. two records dorri (Wattebled [Journal de Conchyliologie, 34, 1886, 54]) micheloti (Morlet 75]). We also propose that nominal jourdyi 75]) syn. synonym douglasiae (Griffith & Pidgeon, 1833) molecular data. BI, ML, BEAST dataset mitochondrial phylogenomics consistently support following relationships: ( N. )) breviconcha (( nuxpersicae nipponensis ) ))))). clock with fossil calibration indicates originated Late Cretaceous period (ca. 73.78 Mya). It then diverged into independent clades during Middle Paleogene 45.01 Mya), followed by rapid burst extant speciation Neogene (mean age 28.28 4.79 earliest differentiated taxon among taxa, appearing Paleogene‐Neogene transition (28.28 Mya; 95% HPD = 14.35–48.44 Taken together, provide robust systematic framework species, addressing relationships, taxonomy, evolutionary history group.

Language: Английский

Citations

4
Underestimated diversity: A new species of the genus Cuneopsis (Bivalvia, Unionidae, Unioninae) from Henan, China DOI Creative Commons

Kaiyu Hou,

Xiaoyun Wang, Nan Fang

et al.

Zoosystematics and Evolution, Journal Year: 2025, Volume and Issue: 101(1), P. 341 - 351

Published: Feb. 14, 2025

The global decline of freshwater mussels and their crucial ecological services highlights the necessity urgency developing guiding conservation efforts for this group. Accurately delineating species understanding phylogeny are to core conservation. Here, we integrate shell morphology, soft-body anatomy, molecular systematics describe a new mussel from Shi River in Xinyang City, Henan Province, China, i.e., Cuneopsis celtiosimilis sp. nov. Morphologically, resembles its congeneric C. kiangsiensis celtiformis size, shape, sculpture. However, can be distinguished closely related congeners by pseudocardinal teeth. For species, two teeth left valve join together form continuous strip; single tooth on right is more squashed lower; papillae incurrent aperture shorter, forming pyramidal shape arranged rows. Molecularly, based mitochondrial barcoding gene cytochrome c oxidase subunit I ( COI ), minimum genetic distance between other known 4.6% vs. ). Additionally, complete mitogenome was also assembled annotated. Based phylogenomic analyses, results clarify phylogenetic position establish most comprehensive relationship genus date, as follows: (((( demangei + heudei ) szechenyii (( )) rufescens discovery taxon contributes existing knowledge key all provided aid identification understudied genus.

Language: Английский

Citations

0
Diversity, phylogeny and distribution of the subtribe Cristariina (Bivalvia: Unionidae: Unioninae) from China, with description of a new genus and species DOI
Ruiwen Wu, Lili Liu, Liping Zhang

et al.

Invertebrate Systematics, Journal Year: 2025, Volume and Issue: 39(3)

Published: March 6, 2025

The family Unionidae is a diverse and ecologically significant group of freshwater invertebrates, playing keystone role in the energy flow nutrient cycling aquatic ecosystems. A recent taxonomic revision East Asian endemic subtribe Cristariina within has revealed its division into seven genera. As an important part Asia, China harbours exceptionally highly unique fauna mussels. However, comprehensive understanding species diversity phylogenetic relationships remains elusive due to inadequate sampling previous studies, particularly China. Here, we conducted mitogenomic analyses based on extensive across 17 provinces COI sequences GenBank were thoroughly examined, combined with obtained from this study, total 33 monophyletic groups identified. By integrating molecular data morphological characteristics, describe new genus species: Acudonta baitiaoensis gen. nov., sp. nov. , as well newly recorded for (Cristaria truncata ). Additionally, confirm that nominal Anemina euscaphys syn. fluminea globosula are junior synonyms arcaeformis through integrative taxonomy. Mitogenomic phylogeny establishes following robust framework at generic level Cristariina: ((((Sinanodonta + ) (Beringiana Pletholophus )) ((Anemina Buldowskia Amuranodonta Cristaria Besides Sinanodonta distribution other genera exhibits distinct faunal regions endemism. ZooBank: urn:lsid:zoobank.org:pub:30E44DEB-3CCD-47F7-A2B2-3FA851BE434E.

Language: Английский

Citations

0
Discovery of an endemism hotspot of freshwater mussels (Bivalvia: Unionidae) in Assam, with a description of two new genera DOI
Ivan N. Bolotov, Jyotish Sonowal, Devid Kardong

et al.

Zoological Journal of the Linnean Society, Journal Year: 2024, Volume and Issue: unknown

Published: May 17, 2024

Abstract The Indian subcontinent houses a unique fauna of freshwater mussels. Tectonic and biogeographic reconstructions indicate that this represents derivative Mesozoic Gondwanan biota it arrived in Asia on the Plate, using tectonic block as ‘biotic ferry’. Though preliminary integrative revision Unionidae was published recently, level endemism taxonomic richness regional assemblages are unsatisfactorily known. Here, we revise taxonomy mussels from Brahmaputra River basin based large DNA-sequence morphological dataset sampled Assam, north-eastern India. We managed to collect sequence topotypes for nearly all nominal species described region, except Lamellidens friersoni Parreysia smaragdites. Our phylogenetic morphology-based research reveals assemblage contains nine species, belonging single subfamily, Parreysiinae. Seven three genera (Balwantia, Pseudoscabies Bolotov, Sonowal, Kardong, Pasupuleti Subba Rao gen. nov., Assamnaia nov.) appear be endemic indicating may represent an hotspot global significance. findings highlight region should considered high-priority area conservation management.

Language: Английский

Citations

0