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Phrantela warwicki Ponder & Clark, 1993

Diagnostic features

P. warwicki is anatomically similar to P. daveyensis (s.l.) and P. richardsoni differing mainly in shell characters, having a somewhat pupiform rather than conical shape.

It does, however, also differ in lacking a pallial tentacle, having a completely unpigmented head-foot, and a number of anatomical features.  P. warwicki is most similar to P. pupiformis in shell and anatomical characters but has a longer gill. These two species have a similar shell shape which is rather unlike other members of the genus. They also differ from other species of Phrantela in having a thick prostate gland, although very similar in other respects.

Classification

Phrantela warwicki Ponder & Clark, 1993

Class Gastropoda

Subclass Caenogastropoda

Order Littorinimorpha 

Superfamily Truncatelloidea

Family Tateidae

Genus Phrantela  Iredale, 1943

Original name: Phrantela warwicki Ponder & Clark, 1993 in Ponder, W. F., Clark, G. A., Miller, A. C and Toluzzi, A. (1993). On a major radiation of freshwater snails in Tasmania and eastern Victoria - a preliminary overview of the Beddomeia group (Mollusca: Gastropoda: Hydrobiidae). Invertebrate Taxonomy, 7: 501-750.

Type locality: Small tributary of the Picton River, southeast Tasmania.

Biology and ecology

This species lives under stones and in moss. Egg capsules unknown but probably like those of another species of Phrantela; small, with single embryo, and covered in coarse sand grains. Development direct.

Distribution

The type is from a small tributary of the Picton River, southeast Tasmania but specimens tentatively referred to this species are located over a reasonably wide area in SE Tasmania.

Notes

This taxon, and a number of possibly conspecific populations which are very similar in shell characters, are found in the south-eastern corner of Tasmania, being the only

member of the genus known from that area, although it is often found sympatrically with species of Nanocochlea.

Further reading

Ponder, W. F., Clark, G. A., Miller, A. C. & Toluzzi, A. (1993). On a major radiation of freshwater snails in Tasmania and eastern Victoria: a preliminary overview of the Beddomeia group (Mollusca: Gastropoda: Hydrobiidae). Invertebrate Taxonomy 7: 501-750.