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Trochidrobia smithi Ponder, Hershler and Jenkins, 1989

Diagnostic features

Shell with short spire and open umbilicus; reaches 2.1 mm in maximum diameter.  This species and Trochidrobia punicea are virtually identical in shell characters but differ anatomically. They are sympatric in only a few springs.

Classification

Trochidrobia smithi Ponder, Hershler and Jenkins, 1989

Class Gastropoda

Subclass Caenogastropoda

Order Littorinimorpha 

Superfamily Truncatelloidea

Family Tateidae

Genus Trochidrobia Ponder, Hershler and Jenkins 1989

Original name: Trochidrobia smithi Ponder, Hershler and Jenkins, 1989. Ponder, W. F., Hershler, R. & Jenkins, B. (1989). An endemic radiation of hydrobiid snails from artesian springs in northern South Australia: their taxonomy, physiology, distribution and anatomy.Malacologia 31: 1-140. 

Type locality: Twelve Mile Springs, South Australia.

Biology and ecology

Shallow water in lower parts of artesian spring outflow living together with species of Fonscochlea.

Additional information on the biology and ecology of members of this family can be found in Fauna of Australia, vol. 5B, p. 752-755.

Distribution

Found in the Middle Springs, South-western Springs and the Northern Springs of the northern South Australian Artesian Spring complex.

Notes

All of the Trochidrobia species are very similar in shell morphology with minor differences in size and protoconch sculpture. The main differences are anatomical - particularly the coiling pattern of the oviduct in the female genital system. There are also geographical clusters of species and species associations (see Ponder, Hershler and Jenkins, 1989).

Further reading

Ponder, W. F., Hershler, R. & Jenkins, B. (1989). An endemic radiation of Hydrobiidae from artesian springs in northern South Australia: their taxonomy, physiology, distribution and anatomy. Malacologia 31: 1-140.