Phylogenetic relationships of the carnivorous terrestrial snail family Streptaxidae (Stylommatophora: Achatinina) in Thailand and surrounding areas of Southeast Asia

Siriboon, Thanit; Naggs, Fred; Wade, Christopher M.; Jeratthitikul, Ekgachai; Tongkerd, Piyoros; Jirapatrasilp, Parin; Panha, Somsak; Sutcharit, Chirasak

doi:10.1080/14772000.2020.1783384

Cited by 8 publications

(24 citation statements)

References 41 publications

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“…The most consistent and reliable character for species delimitation in every species of land snail is the internal anatomy of the penis, along with other genital characters relating to the penis and epiphallus, whereas the gametolytic organ was informative at the genus level (Hyman et al, 2017;Pholyotha et al, 2020;Siriboon et al, 2020). For example, reproductive organs are highly consistent in the dark shell and yellow shell forms (C. Sutcharit, unpublished data) of H. funerea, (i.e., coiled epiphallic caecum and penial verge absent; table 3).…”

Section: Taxonomic Implications In Hemiplectamentioning

confidence: 99%

Reassessment and systematic position of the sinistral snails of genus Hemiplecta from Thailand (Eupulmonata: Ariophantidae), with description of two new species

et al. 2020

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Indochina land snails of the family Ariophantidae are in need of thorough systematic revision. Here we comprehensively revise the systematics of the large-shelled, sinistral (counterclockwise) coiling snails from Thailand and Peninsular Malaysia. Molecular phylogeny based on mitochondrial (coi and 16S) and nuclear (28S) gene sequences demonstrates that these sinistral snails are not members of Dyakiidae as previously thought, but instead are more closely related to the genus Hemiplecta in the family Ariophantidae. Comparative morphology also reveals similarity of reproductive organ features (globular gametolytic organ, well-developed dart apparatus, and lack of amatorial organ complex). Based on this evidence, we propose to transfer these sinistral snails to the genus Hemiplecta. Molecular phylogenetic analyses further strongly support the monophyly of this sinistral lineage with respect to other members of Hemiplecta. This monophyletic clade consists of five members including three species that were previously classified as “Dyakia”, H. lahatensis, H. retrorsa and H. salangana, and two new species described herein, H. ligorica n. sp. and H. thailandica n. sp. This study also suggests that the anatomy of the gametolytic organ in the genus Hemiplecta corresponds well with the phylogenetic relationships and appears to be a taxonomically informative character, while the penial verge has little utility for generic recognition.

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Section: Taxonomic Implications In Hemiplectamentioning

confidence: 99%

Reassessment and systematic position of the sinistral snails of genus Hemiplecta from Thailand (Eupulmonata: Ariophantidae), with description of two new species

et al. 2020

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“…Herein, all previously documented species of Oophana have been redescribed, based on original descriptions compared with historical museum specimens except for O. mouhoti, a new record in Myanmar but based on only a single shell. Siriboon et al (2020) reported this species from several localities in western Thailand, adjacent to Mon State and Kayin State, but it seems rare in Myanmar even though most the historical materials are recorded from Mawlamyine and Tanintharyi. A phylogenetic analysis revealed that O. mouhoti and O. strangulatus (von Möllendorff, 1894) were members of the same clade, and were distinct from other congeners in having a more cylindrical shell.…”

Section: Discussionmentioning

confidence: 99%

“…Distribution. This species has been recorded from several localities in Peninsular Thailand (Siriboon et al 2020) along the southeastern part of the Tenasserim Range. However, only one specimen was collected in Myanmar from the Tanintharyi Region.…”

Section: Oophana Elisa (Gould 1856)mentioning

confidence: 99%

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Revision of the carnivorous land snail family Streptaxidae (Stylommatophora, Achatinina) in Myanmar, with description of four new species

Nem¹,

Siriboon²,

Lin³

et al. 2022

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The carnivorous terrestrial snail family Streptaxidae, recognized by having a regular to eccentric shell with complex apertural dentition, remains little-known and largely unexplored in Myanmar. This article presents historically recorded species and provides new data on this family. A total of eighteen species in five genera, namely Carinartemis, Discartemon, Haploptychius, Oophana, and Perrottetia from the southeastern and eastern parts of Myanmar, is examined herein. Among these, Haploptychius is the most diverse with eight species, while the remaining genera are comprised of fewer than five species each. Streptaxis birmanica and Streptaxis blanfordianus are herein synonymized with Haploptychius blanfordi, while Streptaxis hanleyanus is synonymized with Carinartemis sankeyi. Furthermore, the first genitalia and radula descriptions for three previously known species, D. tonywhitteni, C. exacutus, and C. sankeyi, are provided. Using comparative morphological and anatomical approaches, four new species are described: D. paurodeviatussp. nov., H. heliakosussp. nov., H. tenasserimicussp. nov., and H. karenorumsp. nov. This present study enhances the understanding of the land snail fauna in Myanmar, specifically the streptaxids, and highlights that limestone areas are important for biodiversity conservation.

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“…In recent years, the mitochondrial cytochrome c oxidase subunit I (COI) gene has been widely used as a standard barcoding marker to delineate species, for systematic revision, and to investigate phylogenetic relationships in various groups of land snails (i.e., Liew et al 2009;Hyman & Ponder 2010;Köhler & Criscione 2015;Hyman & Köhler 2018Zhang et al 2020;Siriboon et al 2020). This study integrates morphological and COI gene data to clarify the species boundaries within the genus Aenigmatoconcha.…”

Section: Introductionmentioning

confidence: 99%

Systematic revision of the limestone karst-restricted land snail genus Aenigmatoconcha (Eupulmonata: Helicarionidae), with description of a new species

Pholyotha

Sutcharit

Tongkerd

et al. 2021

EJT

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Thai limestone karsts are known to contain a rich biodiversity of animals, especially terrestrial snails, but still require further intensive exploration to evaluate their biodiversity. To date, only a few studies on the limestone karst-inhabiting land snail genera have been published. The present work focuses on the species diversity and phylogenetic relationships of the limestone karst-restricted land snail genus Aenigmatoconcha from Thailand, based on comparative morphology and molecular evidence. The results yielded three known species (A. clivicola Tumpeesuwan & Tumpeesuwan, 2017, A. sumonthai Tumpeesuwan & Tumpeesuwan, 2018, and A. mitis (Pfeiffer, 1863) comb. nov.), plus a new species (A. eunetis Pholyotha & Panha sp. nov). The phylogenetic analyses of partial fragments of the mitochondrial cytochrome oxidase c subunit I (COI) gene confirmed the monophyly of all recognized species and congruence with the traditional morphology-based species designations. Average uncorrected p-distances of COI sequences between species were 9.7–12.0% and within species were 0.2–4.2%. This study also provides the re-description of penial sculpture, penial sheath, flagellum, penial caecum, and mantle lobe morphology that were neglected from the type species description. The present discovery of a new species increases the known diversity of Thai land snails and will support the conservation planning to protect karst biodiversity.

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Phylogenetic relationships of the carnivorous terrestrial snail family Streptaxidae (Stylommatophora: Achatinina) in Thailand and surrounding areas of Southeast Asia

Cited by 8 publications

References 41 publications

Reassessment and systematic position of the sinistral snails of genus Hemiplecta from Thailand (Eupulmonata: Ariophantidae), with description of two new species

Reassessment and systematic position of the sinistral snails of genus Hemiplecta from Thailand (Eupulmonata: Ariophantidae), with description of two new species

Revision of the carnivorous land snail family Streptaxidae (Stylommatophora, Achatinina) in Myanmar, with description of four new species

Systematic revision of the limestone karst-restricted land snail genus Aenigmatoconcha (Eupulmonata: Helicarionidae), with description of a new species

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Phylogenetic relationships of the carnivorous terrestrial snail family Streptaxidae (Stylommatophora: Achatinina) in Thailand and surrounding areas of Southeast Asia

Cited by 8 publications

References 41 publications

Reassessment and systematic position of the sinistral snails of genus Hemiplecta from Thailand (Eupulmonata: Ariophantidae), with description of two new species

Reassessment and systematic position of the sinistral snails of genus Hemiplecta from Thailand (Eupulmonata: Ariophantidae), with description of two new species

﻿Revision of the carnivorous land snail family Streptaxidae (Stylommatophora, Achatinina) in Myanmar, with description of four new species

Systematic revision of the limestone karst-restricted land snail genus Aenigmatoconcha (Eupulmonata: Helicarionidae), with description of a new species

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Revision of the carnivorous land snail family Streptaxidae (Stylommatophora, Achatinina) in Myanmar, with description of four new species