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Coxiella (Coxiella) pyrrhostoma (Cox, 1868)

Diagnostic features

Shell large (up to about 13 mm long), decollate when adult, finely axially and spirally striated; whorls very lightly convex, suture shallow. Aperture red inside. Operculum paucispiral.

Classification

Coxiella (Coxiella) pyrrhostoma (Cox, 1868)

Class Gastropoda

Subclass Caenogastropoda

Order Littorinimorpha

Superfamily Truncatelloidea

Family Pomatiopsidae

Subfamily: Pomatiopsinae

Genus Coxiella Smith,1894

Subgenus Coxiella

Original name: Blandfordia pyrrhostoma Cox, 1868. Cox, J. C. (1868). A Monograph of Australian Land Shells . Sydney: Maddock. 111pp.

Type locality: Shark Bay, Western Australia.

State of taxonomy

We follow Macpherson (1957), which is the latest taxonomic treatment of this group.

Biology and ecology

Inhabits salt lakes.

The animals are characterised by a deep furrow on each side of the head, and a suprapedal fold around the sides of the foot. Movement is by steps. The snout is long. The eyes have a cluster of glands above them. Coxiella are dioecious. Development is direct. Females are oviparous, depositing eggs singly in capsules coated in sand or mud. Coxiella probably feed on organic detritus. They are amphibious.

Distribution

Southwest coast and Indian Ocean divisions, Western Australia.

Notes

For species description see Macpherson (1957).

Further reading

Beesley, P. L., Ross, G. J. B. & Wells, A., Eds. (1998). Mollusca: The Southern Synthesis. Parts A & B. Melbourne, CSIRO Publishing.

Davis, G. M. (1979). The origin and evolution of the gastropod family Pomatiopsidae, with emphasis on the Mekong River Triculinae. Academy of Natural Sciences of Philadelphia Monographs 20: 1-120.

Iredale, T. (1943). A basic list of the fresh water Mollusca of Australia. Australian Zoologist 10: 188-230. 

Macpherson, J. H. (1957). A review of the genus Coxiella Smith, 1894, sensu lato. Western Australian Naturalist 5: 191-204.

Smith, B. J. & Kershaw, R. C. (1979). Field guide to the non-marine Molluscs of South-eastern Australia. Canberra, A.N.U. Press.