''Amphidromus cognatus'' (cognate land snail) is a large camaenid

land snail A land snail is any of the numerous species of snail that live on land, as opposed to the sea snails and freshwater snails. ''Land snail'' is the common name for terrestrial gastropod mollusks that have shells (those without shells are known as ...

endemic to

Australia Australia, officially the Commonwealth of Australia, is a Sovereign state, sovereign country comprising the mainland of the Australia (continent), Australian continent, the island of Tasmania, and numerous List of islands of Australia, sma ...

. MolluscaBase (2018). Amphidromus cognatus Fulton, 1907. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=1296584 on 2018-09-09

Taxonomy

Its subgeneric placement is '' Incertae sedis''.

Laidlaw F. F. & Solem A. (1961)
"The land snail genus ''Amphidromus'': a synoptic catalogue"
''Fieldiana Zoology'' 41(4): 505-720.

Description

''Amphidromus cognatus'' is large, with a shell length ranging from 21–33 mm (0.8–1.3 inches) and a diameter of 12–17 mm (0.5–0.7 inches). The ground colour of its shell is yellow, often with a peripheral spiral brown band, a purplish apical suffusion and a light yellow or white lip.Threatened Species of the Northern Territory: Cognate Land Snail (Amphidromus cognatus)
, Government of the Northern Territory.

Distribution

''Amphidromus cognatus'' has only been found in a restricted geographic range in

's Northern Territory. Solem A. (1983). "First record of ''Amphidromus'' from Australia with anatomical note on several species (Mollusca: Pulmonata: Camaenidae)". ''

Records of the Australian Museum A record, recording or records may refer to: An item or collection of data Computing * Record (computer science), a data structure ** Record, or row (database), a set of fields in a database related to one entity ** Boot sector or boot record, re ...

'' 35(4): 153-166.
HTM

PDF
. The snail was first described in 1907, from three specimens found at

Port Essington Port Essington is an inlet and historic site located on the Cobourg Peninsula in the Garig Gunak Barlu National Park in Australia's Northern Territory. It was the site of an early attempt at British settlement, but now exists only as a remote ...

on the Cobourg Peninsula before 1850, although it was not found there since. Several sightings were made between 1976 and 1980, at one site on Bathurst Island and three sites at Melville Island.

Conservation status

''Amphidromus cognatus'' is considered Endangered by the

IUCN The International Union for Conservation of Nature (IUCN; officially International Union for Conservation of Nature and Natural Resources) is an international organization working in the field of nature conservation and sustainable use of natu ...

(World Conservation Union). The species is not listed on the Australian government's list of threatened fauna, but the Northern Territory government considers it Vulnerable.

References

Fulton, H. C. (1907). Descriptions of new species of Trochomorpha, Cochlostyla, Amphidromus, Bulimulus, Drymæus, Placostylus, Stenogyra, Leptopoma, Cyclophorus, Cyclotus, and Alycæus. Annals and Magazine of Natural History, Series 7. 19(110): 149-157

External links

Solem, A. (1983). First record of Amphidromus from Australia, with anatomical notes on several species (Mollusca: Pulmonata: Camaenidae). Records of the Australian Museum, 35 (4): 153-166
{{Taxonbar, from=Q309131 cognatus Endemic fauna of Australia Gastropods described in 1907 Taxonomy articles created by Polbot