The land snail genus Macrochlamys Gray, 1847 from Thailand, with descriptions of five new species (Pulmonata: Ariophantidae)

Digital Gems > Biodiversity Library of Southeast Asia

Language

English

Creator

Pholyotha, A.
Sutcharit, C.
Panha, S.

Source Title

The Raffles Bulletin of Zoology

Publication date

2018/12/03

Publisher

Dept. of Zoology, National University of Singapore, Singapore

Page

763–781

Content Type

Journal Article

Object Type

Text

Terms of Use

Open Access

Access Status

Open

Repository

NUS Libraries

Start File Page

763

End File Page

781

Volume

66

Issue

1

Call Number

QL319 NMB

Subject

Snails -- Thailand -- Classification
Snails -- Thailand -- Idnetification

Keyword

terrestrial snails
limacoid snail
taxonomy
systematics
Indochina
limestone

Abstract

The taxonomic status of the limacoid genus Macrochlamys Gray, 1847 in Thailand has long been plagued by much ambiguity due to the inability to distinguish members from each other, and a few other genera, by shell morphology alone. The taxonomy of the Thai species is evaluated resulting in recognition of seven species, including five new species. The new species, Macrochlamys aurantia, M. coleus and M. tanymentula from Kanchanaburi Province (West Thailand), and M. caverna and M. lemma from Lopburi Province (Central Thailand), are distinguished and described based on shell, animal colouration, radula and genitalia characters. The status of Macrochlamys brunnea Möllendorff, 1902b is at present unclear. Although described from Bangkok, no material identifiable as this species was found in recent extensive surveys and it is provisionally retained in the genus without anatomical evaluation. Macrochlamys kelantanensis Möllendorff, 1902a is re-described with additional morphological and anatomical information. The five new species appear to have a restricted distribution in Western and Central Thailand, whereas M. kelantanensis is more wide-ranging, from Thailand to Malaysia. Detailed descriptions and illustrations of the shell morphology, external morphology, genital anatomy and radulae are provided. The results show that despite the shells being morphologically similar, aspects of classical morphology based taxonomy for Macrochlamys species, especially the genitalia morphology, remain useful and reliable for species delimitation.

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