Amphidromus cognatus

Amphidromus cognatus (cognate land snail) is a large camaenid land snail endemic to Australia. [2]

Amphidromus cognatus
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Gastropoda
(unranked):
clade Heterobranchia
clade Euthyneura
clade Panpulmonata
clade Eupulmonata
clade Stylommatophora
informal group Sigmurethra
Superfamily:
Helicoidea
Family:
Camaenidae
Subfamily:
Camaeninae
Genus:
Amphidromus
Species:
A. cognatus
Binomial name
Amphidromus cognatus
Fulton, 1907

Taxonomy

Its subgeneric placement is Incertae sedis.[3]

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.[4]

Distribution

Amphidromus cognatus has only been found in a restricted geographic range in Australia's Northern Territory.[5]

The snail was first described in 1907, from three specimens found at Port Essington 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.[4]

Conservation status

Amphidromus cognatus is considered Endangered by the IUCN (World Conservation Union).[1] The species is not listed on the Australian government's list of threatened fauna, but the Northern Territory government considers it Vulnerable.[4]

References
  1. Kessner, V., Köhler, F., Ponder, W. & Seddon, M.B.. [Amphidromus cognatus]. [https://www.iucnredlist.org/species/1167/72403299 http://www.iucnredlist.org 2020 IUCN Red List of Threatened Species Archived [Date missing] at iucnredlist.org [Error: unknown archive URL] Downloaded on 23 January 2021.
  2. 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
  3. Laidlaw F. F. & Solem A. (1961). "The land snail genus Amphidromus: a synoptic catalogue". Fieldiana Zoology 41(4): 505-720.
  4. Threatened Species of the Northern Territory: Cognate Land Snail (Amphidromus cognatus) Archived September 3, 2008, at the Wayback Machine, Government of the Northern Territory.
  5. Solem A. (1983). "First record of Amphidromus from Australia with anatomical note on several species (Mollusca: Pulmonata: Camaenidae)". Records of the Australian Museum 35(4): 153-166. doi:10.3853/j.0067-1975.35.1983.315, HTM Archived July 6, 2011, at the Wayback Machine, PDF Archived July 6, 2011, at the Wayback Machine.
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