Land snail fauna of the Mekong Delta Limestone Hills (Cambodia, Vietnam): Notharinia Vermeulen, Phung et Truong, 2007, and a note on Plectostoma A. Adams, 1865 (Mollusca: Gastropoda: Caenogastropoda: Diplommatinidae)

Vermeulen, Jaap J.; Luu, Hong Truong; Theary, Keum; Anker, Katie

doi:10.12657/folmal.027.015

Cited by 8 publications

(9 citation statements)

References 25 publications

(2 reference statements)

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“…General shell characters were further divided into detailed sub-characters exclusively for the descriptions of the representatives of the “scaly group” of Bornean Georissa . The assessed morphological characters follow the descriptions made by Godwin-Austen (1889), Gredler (1902), Haase and Schilthuizen (2007), Smith (1893, 1895), Thompson and Dance (1983), van Benthem-Jutting (1966), Vermeulen and Junau (2007), and Vermeulen et al (2015). Note that color indications always refer to living or freshly dead specimens, as the color in older specimens usually degrades, with an exception for Georissa scalinella (van Benthem-Jutting, 1966), where only old collection specimens were available.…”

Section: Methodsmentioning

confidence: 99%

“…Previous taxonomic treatments of Bornean Georissa (Godwin-Austen 1889, Gredler 1902, Haase and Schilthuizen 2007, Smith 1893, 1895, Thompson and Dance 1983, van Benthem-Jutting 1966, Vermeulen and Junau 2007, Vermeulen et al 2015) revealed that shell shape and size, as well as sculptural patterns on the whorls are important characters for species delimitation. Given the small size of these shells, great benefits can be had from the use of scanning electron microscopy and X-ray microtomography, which are able to show detailed microscopic sculpture patterns and the inner part of the shell.…”

Section: Introductionmentioning

confidence: 99%

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A molecular and conchological dissection of the “scaly” Georissa of Malaysian Borneo (Gastropoda, Neritimorpha, Hydrocenidae)

Khalik¹,

Hendriks²,

Vermeulen³

2018

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The Bornean hydrocenids have so far been understudied compared to other non-pulmonate snails in this region. In the present study, we review a first group of minute land snail species belonging to the genus Georissa (Gastropoda, Hydrocenidae) from Malaysian Borneo. This group is restricted to the species with conspicuous scale-like sculpture on the shell. Based on materials from recent fieldwork, museums, and personal collections, Malaysian Borneo hydrocenids are more complex and diverse in shell characters than previously anticipated. Here, a molecular, conchological, and biogeographic study of this “scaly group” is presented. We recognise 13 species of which six are new to science, namely Georissa anyiensis sp. n., Georissa muluensis sp. n., Georissa bauensis sp. n., Georissa silaburensis sp. n., Georissa kinabatanganensis sp. n., and Georissa sepulutensis sp. n.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A molecular and conchological dissection of the “scaly” Georissa of Malaysian Borneo (Gastropoda, Neritimorpha, Hydrocenidae)

Khalik¹,

Hendriks²,

Vermeulen³

2018

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“…Malacological research in Cambodia can be traced back to the 19 th century, but studies have been temporally and spatially sporadic. However, a small number of local investigations have been undertaken in the past decade (Vermeulen et al 2007(Vermeulen et al , 2019a.…”

Section: Introductionmentioning

confidence: 99%

“…The species list of molluscan fauna from Cambodia was reviewed by Fischer (1973a-c). The endemic and monotypic slug, Cambodiparmarion doroshenkoi, was described from the south of Cambodia (Kuznetsov and Kuzminykh 1999) and Vermeulen et al (2007Vermeulen et al ( , 2019a reported land snails from south Cambodia and Vietnam, mainly focusing on Mekong Delta limestone in the southwest and the foothills of the southern Annamite range in the northeast. In addition, Hun et al (2019) discovered the giant land snail Bertia cambojiensis in Cambodia for the first time.…”

Section: Introductionmentioning

confidence: 99%

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Annotated checklist of the land snail fauna from southern Cambodia (Mollusca, Gastropoda)

Sutcharit

Thach

Chhuoy

et al. 2020

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Prior to this study, few collections and records were made of the land snails in Cambodia and the historical taxa had never been reviewed. Herein a report on the land snail diversity based on specimens collected recently from karstic and non-karstic areas in southern Cambodia is provided. This checklist presents 36 species of land snails (two Neritimorpha, six Caenogastropoda, and 28 Heterobranchia). Illustrations and brief taxonomic notes/remarks are provided for every species. We also described Georrisa carinata Sutcharit & Jirapatrasilp, sp. nov. based on some distinct shell morphological characters. Since the first descriptions during the colonial period in the nineteenth century, some land snail species (e.g., Trichochloritis norodomiana, Durgella russeola, Anceyoconcha siamensis obesulacomb. nov., Anceyoconcha chaudoensiscomb. nov., and Succinea tenuis) have not been reported subsequently. This probably reflects a lack of knowledge concerning land snail biodiversity in this country. To our knowledge, this is the first comprehensive survey of land snails in southern Cambodia. A need for more field research and systematic revision of the land snails in this interesting region is also highlighted and demonstrated.

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The first records of mollusks from mid-Cretaceous Hkamti amber (Myanmar), with the description of a land snail, Euthema myanmarica n. sp. (Caenogastropoda, Cyclophoroidea, Diplommatinidae)

Balashov

2021

J. Paleontol.

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Five land snails and the borings of marine bivalves are reported from Hkamti (Khamti) amber whose age was recently uranium-lead dated to be ca. 110 Ma, in contrast to the nearby Kachin (‘Burmese’) amber considered to be ca. 99 Ma. Four of the snails belong to Cyclophoridae, and although their condition does not allow unambiguous identification or description of the species, one of them strongly resembles Archaeocyclotus plicatula Asato and Hirano in Hirano et al., 2019 from Kachin amber. The fifth snail, Euthema myanmarica n. sp. (Diplommatinidae), is a representative of a genus that was known exclusively from Kachin amber until now. The genus Euthema Yu, Wang, and Pan, 2018 is revised, with a new synonym, Xenostoma Bullis et al., 2020. The recently described ‘Truncatellina dilatatus’ Yu, 2020 from Kachin amber is placed in Euthema. A comparison of the distinguishing characters of the eight Euthema species is provided. The borings of bivalves in Hkamti amber correspond to the ichnospecies Teredolites clavatus Leymerie, 1842, associated with the bivalve genus Martesia Sowerby, 1824 (Pholadidae), and are common in Kachin amber. Similarity of the malacofauna from Hkamti and Kachin ambers, as well as the presence of numerous, similar Teredolites clavatus, indicates that these ambers were formed in very similar paleoenvironments. This indication suggests that forests with very similar conditions existed throughout the entire Albian to the early Cenomanian, or that the dating of at least one of these amber deposits is incorrect. In the latter case, it would mean that Kachin amber is at least 110 Ma or older. UUID: http://zoobank.org/142f10a2-307f-4053-9b29-8aa18db66219

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Land snail fauna of the Mekong Delta Limestone Hills (Cambodia, Vietnam): Notharinia Vermeulen, Phung et Truong, 2007, and a note on Plectostoma A. Adams, 1865 (Mollusca: Gastropoda: Caenogastropoda: Diplommatinidae)

Abstract: Diplommatinidae; formerly included in Pupinidae) are described from limestone hills on the east flank of the Mekong Delta, in Vietnam and Cambodia. A map showing the distribution of all ten species now known from the area is presented. In addition,

Cited by 8 publications

References 25 publications

A molecular and conchological dissection of the “scaly” Georissa of Malaysian Borneo (Gastropoda, Neritimorpha, Hydrocenidae)

A molecular and conchological dissection of the “scaly” Georissa of Malaysian Borneo (Gastropoda, Neritimorpha, Hydrocenidae)

Annotated checklist of the land snail fauna from southern Cambodia (Mollusca, Gastropoda)

The first records of mollusks from mid-Cretaceous Hkamti amber (Myanmar), with the description of a land snail, Euthema myanmarica n. sp. (Caenogastropoda, Cyclophoroidea, Diplommatinidae)

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