Amphidromus costifer

Amphidromus costifer
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Order:	Stylommatophora
Family:	Camaenidae
Genus:	Amphidromus
Species:	A. costifer
Binomial name
Amphidromus costifer Smith, 1893
Synonyms
Amphidromus costifer costiferE. A. Smith, 1893 Amphidromus costifer gemmalimaeThach, 2020 junior subjective synonym Amphidromus nguyenkhoaiThach, 2020 junior subjective synonym

Amphidromus costifer is a species of large-sized air-breathing tree snail, an arboreal gastropod mollusk in the family Camaenidae. ^[1]

Subspecies

• Amphidromus costifer costiferE. A. Smith, 1893: synonym of Amphidromus costiferE. A. Smith, 1893
• Amphidromus costifer gemmalimaeThach, 2020: : synonym of Amphidromus costiferE. A. Smith, 1893

Description

The length of the shell attains 47 mm, its diameter 24 mm.

A large and thick Amphidromus species with strong growth lines. The holotype is 46.5 mm in height, and 29.0 mm in width. ^[2]

(Original description in Latin) The shell presents a slit-like umbilicus. The whitish shell is ovate and dextral, and feels solid. Its surface exhibits more or less streaking or variegation with purplish-brown above the body whorl. It comprises six somewhat convex whorls, which are separated by a slightly oblique suture. The whorls show striations of growth lines (which are rugose on the body whorl) and are sculptured with obsolete spiral striae. The body whorl features a strong, very oblique white varix on its back. The aperture is broadly somewhat ear-shaped, reaching half of the total length, and is whitish internally. The peristome appears white and thickened, with the right margin slightly reflected and the columellar margin broadly dilated, merging above with the outer lip via a very broad, thick white callus. The columella is somewhat perpendicular and slightly twisted, while the spire is conoid with convex margins. ^[3]

Distribution

The type locality is Binh Dinh, Dak Lak, and Gia Lai provinces in Central Vietnam. ^[2]

References

1. Amphidromus costiferE. A. Smith, 1893 . 17 April 2025. Retrieved through: World Register of Marine Species .
2. Sutcharit, Chirasak (2015). "Illustrated type catalogue of Amphidromus Albers, 1850 in the Natural History Museum, London, and descriptions of two new species". ZooKeys: 65.
3. Smith, E. A. (1893). Descriptions of six new species of land-shells from Annam. Proceedings of the Malacological Society of London. 1: 10-13 This article incorporates text from this source, which is in the public domain .

• Schileyko, A. A. (2011). Check-list of land pulmonate molluscs of Vietnam (Gastropoda: Stylommatophora). Ruthenica. 21 (1): 1-68.
• Thach N. N. (2020). New shells of South Asia. Volume 2. Seashells*Freshwater*Land snails. With one New Genus and 140 New Species & Subspecies, Reply to comments made in error. 48HRBooks Company, Akron, Ohio, USA. 189 pp.

External links

• Sutcharit C., Ablett J., Tongkerd P., Naggs F. & Panha S. (2015). "Illustrated type catalogue of Amphidromus Albers, 1850 in the Natural History Museum, London, and descriptions of two new species". ZooKeys (492): 65. Bibcode:2015ZooK..492...49S. doi: 10.3897/zookeys.492.8641 . hdl: 10141/607106 .
• Jirapatrasilp, P., Huang, Chih-Wei, Sutcharit, C., Lee, Chi-Tse. (2024). "The arboreal snail genus Amphidromus Albers, 1850 (Eupulmonata, Camaenidae) of Southeast Asia: 1. Molecular systematics of some Vietnamese species and related species from Cambodia, Indonesia, and Laos". ZooKeys (1196): 15–78. Bibcode:2024ZooK.1196...15J. doi: 10.3897/zookeys.1196.112146 . PMC   10980882 . PMID   38560093.