Biology:Tomichia cawstoni

From HandWiki
Short description: Species of gastropod


Tomichia cawstoni
Scientific classification
Kingdom:
Animalia
Phylum:
Class:
Order:
(unranked):
Superfamily:
Family:
Tomichiidae
Genus:
Species:
T. cawstoni
Binomial name
Tomichia cawstoni
Connolly, 1939

Tomichia cawstoni is a species of very small freshwater snails which have a gill and an operculum, gastropod mollusks or micromollusks in the family Tomichiidae.

Distribution

This species is endemic to South Africa.[1] The type locality is Kokstad, KwaZulu-Natal, Eastern Cape Province, South Africa.[2]

Description

The width of the shell is 2.5 mm.; the height of the shell is 4.6 mm. Spire short, and flat sided. Whorls weakly convex.[2]

Ecology

The natural habitat for this species is rivers in riverine forests, predominantly of freshwater in contrast to other species which inhabit ephemeral streams and rivers.[1][3]

Threats

Species of the genus Tomichia are particularly susceptible to changes in their ecosystem, and thus species such as Tomichia cawstoni are greatly threatened by pollution and climatic changes (especially in the form of changes in rain cycles). In Kokstad, it is threatened by pollution and trampling from commercial cattle farming operations. All suitable locations for this species' inhabitance have since been found destroyed, restricting the species to the type locality.

References

  1. 1.0 1.1 1.2 Kristensen, T.K.; Stensgaard, A-S.; Appleton, C. (2010). "Tomichia cawstoni". IUCN Red List of Threatened Species 2010: e.T63444A12676489. doi:10.2305/IUCN.UK.2010-3.RLTS.T63444A12676489.en. https://www.iucnredlist.org/species/63444/12676489. Retrieved 16 November 2021. 
  2. 2.0 2.1 Brown D. S. (1994). Freshwater Snails of Africa and their Medical Importance. Taylor & Francis. ISBN:0-7484-0026-5.
  3. Brooks, E. G. E.; Allen, David James; Darwall, W. R. T. (2011) (in en). The Status and Distribution of Freshwater Biodiversity in Central Africa. IUCN. ISBN 9782831713267. https://books.google.com/books?id=oxS-fY6MTZUC&q=the+status+and+distribution+of+freshwater+biodiversity+in+Southern+Africa. 

External links

  • Davis G. M. (1981). "Different modes of evolution and adaptive radiation in the Pomatiopsidae (Prosobranchia: Mesogastropoda)". Malacologia 21: 209-262.

Wikidata ☰ Q5220238 entry