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Systematic revision of the snorkel snail genus Rhiostoma Benson, 1860 (Gastropoda, Caenogastropoda, Cyclophoridae) with descriptions of new species
The snorkel snail genus Rhiostoma Benson, 1860 is comprised of terrestrial cyclophorid snails with wide-ranging species diversity and radiation in Southeast Asia. The typical characters of the genus are a depressed shell, a detached and descending portion of the last whorl with a distinctive peristo...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Pensoft Publishers
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10208988/ https://www.ncbi.nlm.nih.gov/pubmed/37250203 http://dx.doi.org/10.3897/zookeys.1142.90097 |
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author | Tongkerd, Piyoros Tumpeesuwan, Sakboworn Inkhavilay, Khamla Prasankok, Pongpun Jeratthitikul, Ekgachai Panha, Somsak Sutcharit, Chirasak |
author_facet | Tongkerd, Piyoros Tumpeesuwan, Sakboworn Inkhavilay, Khamla Prasankok, Pongpun Jeratthitikul, Ekgachai Panha, Somsak Sutcharit, Chirasak |
author_sort | Tongkerd, Piyoros |
collection | PubMed |
description | The snorkel snail genus Rhiostoma Benson, 1860 is comprised of terrestrial cyclophorid snails with wide-ranging species diversity and radiation in Southeast Asia. The typical characters of the genus are a depressed shell, a detached and descending portion of the last whorl with a distinctive peristomal breathing device attached, and a calcareous cup-shaped operculum. Herein, we have revised the systematics of extant species based on shell morphology combined with COI barcoding. From these thirty recognised species, twelve are described as new to science: R. ? amarapuraensesp. nov., R.anceyisp. nov., R.breviocollarsp. nov., R.ebenozosterasp. nov., R.cheliopegmasp. nov., R.furfurosumsp. nov., R.gnomus, sp. nov., R.lannaensesp. nov., R.laoensesp. nov., R.platymorphasp. nov., R.rhothonotaphrosasp. nov., and R.tigrinasp. nov. All conchological characters are provided via illustrations of type specimens and living snails, and descriptions of the shells and radulae. Phylogenetic analysis based on partial COI gene sequences strongly supports the designated morphospecies and a monophyletic Rhiostoma, confirming that all pterocyclinid snails with a calcareous, cup-shaped operculum belong to the same clade. A high intra-specific divergence was observed in R.jalorensis and R.housei populations from locations in close proximity, suggesting a lower dispersal and higher level of isolation. The low inter-specific divergence found in R.hainesi, R.samuiense, R.asiphon, and R.rhothonotaphrosasp. nov. supports their recent diversification and local adaptation, and is congruent with their marked morphological differences. Finally, nine formerly Rhiostoma-placed species were reclassified into either the genus Cyclotus or the genus Opisthoporus. |
format | Online Article Text |
id | pubmed-10208988 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Pensoft Publishers |
record_format | MEDLINE/PubMed |
spelling | pubmed-102089882023-05-26 Systematic revision of the snorkel snail genus Rhiostoma Benson, 1860 (Gastropoda, Caenogastropoda, Cyclophoridae) with descriptions of new species Tongkerd, Piyoros Tumpeesuwan, Sakboworn Inkhavilay, Khamla Prasankok, Pongpun Jeratthitikul, Ekgachai Panha, Somsak Sutcharit, Chirasak Zookeys Research Article The snorkel snail genus Rhiostoma Benson, 1860 is comprised of terrestrial cyclophorid snails with wide-ranging species diversity and radiation in Southeast Asia. The typical characters of the genus are a depressed shell, a detached and descending portion of the last whorl with a distinctive peristomal breathing device attached, and a calcareous cup-shaped operculum. Herein, we have revised the systematics of extant species based on shell morphology combined with COI barcoding. From these thirty recognised species, twelve are described as new to science: R. ? amarapuraensesp. nov., R.anceyisp. nov., R.breviocollarsp. nov., R.ebenozosterasp. nov., R.cheliopegmasp. nov., R.furfurosumsp. nov., R.gnomus, sp. nov., R.lannaensesp. nov., R.laoensesp. nov., R.platymorphasp. nov., R.rhothonotaphrosasp. nov., and R.tigrinasp. nov. All conchological characters are provided via illustrations of type specimens and living snails, and descriptions of the shells and radulae. Phylogenetic analysis based on partial COI gene sequences strongly supports the designated morphospecies and a monophyletic Rhiostoma, confirming that all pterocyclinid snails with a calcareous, cup-shaped operculum belong to the same clade. A high intra-specific divergence was observed in R.jalorensis and R.housei populations from locations in close proximity, suggesting a lower dispersal and higher level of isolation. The low inter-specific divergence found in R.hainesi, R.samuiense, R.asiphon, and R.rhothonotaphrosasp. nov. supports their recent diversification and local adaptation, and is congruent with their marked morphological differences. Finally, nine formerly Rhiostoma-placed species were reclassified into either the genus Cyclotus or the genus Opisthoporus. Pensoft Publishers 2023-01-24 /pmc/articles/PMC10208988/ /pubmed/37250203 http://dx.doi.org/10.3897/zookeys.1142.90097 Text en Piyoros Tongkerd, Sakboworn Tumpeesuwan, Khamla Inkhavilay, Pongpun Prasankok, Ekgachai Jeratthitikul, Somsak Panha, Chirasak Sutcharit https://creativecommons.org/licenses/by/4.0/This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
spellingShingle | Research Article Tongkerd, Piyoros Tumpeesuwan, Sakboworn Inkhavilay, Khamla Prasankok, Pongpun Jeratthitikul, Ekgachai Panha, Somsak Sutcharit, Chirasak Systematic revision of the snorkel snail genus Rhiostoma Benson, 1860 (Gastropoda, Caenogastropoda, Cyclophoridae) with descriptions of new species |
title | Systematic revision of the snorkel snail genus Rhiostoma Benson, 1860 (Gastropoda, Caenogastropoda, Cyclophoridae) with descriptions of new species |
title_full | Systematic revision of the snorkel snail genus Rhiostoma Benson, 1860 (Gastropoda, Caenogastropoda, Cyclophoridae) with descriptions of new species |
title_fullStr | Systematic revision of the snorkel snail genus Rhiostoma Benson, 1860 (Gastropoda, Caenogastropoda, Cyclophoridae) with descriptions of new species |
title_full_unstemmed | Systematic revision of the snorkel snail genus Rhiostoma Benson, 1860 (Gastropoda, Caenogastropoda, Cyclophoridae) with descriptions of new species |
title_short | Systematic revision of the snorkel snail genus Rhiostoma Benson, 1860 (Gastropoda, Caenogastropoda, Cyclophoridae) with descriptions of new species |
title_sort | systematic revision of the snorkel snail genus rhiostoma benson, 1860 (gastropoda, caenogastropoda, cyclophoridae) with descriptions of new species |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10208988/ https://www.ncbi.nlm.nih.gov/pubmed/37250203 http://dx.doi.org/10.3897/zookeys.1142.90097 |
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