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TELLINIDAE |
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Cadella
subdiluta (Tate,
1887) Description: Shell translucent. Shape triangularly
ovate, umbo at posterior quarter, antero-dorsal margin straight, postero-dorsal
margin concave, ventral margin smoothly rounded. Tellinid posterior
flexure not noticeable. Exterior with regular, close, commarginal
riblets over whole surface. Interior smooth, muscle scars defined
but pallial line and pallial sinus not evident. Hinge right valve
with 2 cardinal teeth, the posterior larger, triangular, bifid, and two
laterals; left valve with 2 cardinal teeth, the anterior large and
bifid, but no laterals. Ligament external. Shell colour
white or pale yellow. Size:
Up to 12 mm in length. Distribution:
Endemic to Australia: Southern Qld, southwards and around
southern Australia to south-western WA. Habitat: Beach
washup from harbour and open ocean beaches, and down to 64 m. Common. Comparison: This species is characterised by the umbo being at
the posterior quarter. The closest comparison in NSW is Semelangulus
tenuiliratus, which differs by having the ventral margin undulating.
The specific name subdilutus compares this species with Cadella
diluta Smith, 1885, which was described from east of Cape York, in
155 fathoms (283 m), and is probably a different species. Fig.
1:
Cronulla, NSW [Beach] C.368919 |
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