Two new species of Landouria Godwin-Austen, 1918 (Gastropoda, Camaenidae) from Thailand, with a key to Thai species

By

Nahok, Benchawan
Chanlabut, Utain
Tumpeesuwan, Sakboworn
Tumpeesuwan, Chanidaporn

Type

Article

Date of Publication

2024

Original Publication

ZooKeys

Volume

1208

Pages

347--362

Subjects

Aegistini , Bradybaeninae , radula , reproductive anatomy , shell morphology

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers

Identifiers

DOI: https://doi.org/10.3897/zookeys.1208.117056

 

Abstract

The present work contains descriptions of two new species of Landouria and a key to Thai species of this genus. Landouria bellasp. nov. is described from isolated limestone hills in Ratchaburi and Phetchaburi provinces, western Thailand. This new species is characterized by its small depressed-globose shell without a peripheral keel, the presence of a small, thin lamella on the columellar side of the inner aperture, a long, cylindrical distally bent flagellum, a short penis with a rounded verge, and a short, thick free oviduct and vagina. The second new species, Landouria monodonsp. nov. is described from sandstone hills in Kalasin Province, northeastern Thailand. This species has a depressed-conic shell with a blunt peripheral keel, a thick prominent lamella on the columellar side of the inner aperture, a short, finger-shaped, distally bent flagellum, and a long penis with a small, short verge.