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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
E.A.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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