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PSAMMOBIIDAE |
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Gari
modesta
(Deshayes, 1855) Description:
Shape elongate or elongate-ovate, umbo central;
weak broad ridge from umbo to postero-ventral margin on both valves;
anterior end rounded, ventral margin straight or weakly convex,
posterior end broader than anterior end. Exterior surface with
weak, irregular, commarginal ridges overlaid by broader, flat, oblique
cords. Interior pale purple, smooth; muscle scars and pallial
line well-defined, pallial sinus extending forward past midline. Hinge
right valve with 2 bifid cardinal teeth, left valve with 2 cardinal
teeth, the anterior stronger.
Ligament:
external,
long, attached on raised nymphs. Shell colour pale pinkish
purple or bluish violet, occasionally pale orange, sometimes with vague
reddish rays. Periostracum thin, rusty brown, almost always lost. Size:
Up to 27 mm in length, usually 18-24 mm for adults. Distribution:
Endemic to Australia: from southern Great Barrier Reef southwards
and around southern Australia to south-western WA, including Tas. Habitat:
Subtidal, 4-205 m depth, in coarse sand or grit, sometimes with
mud, in areas of considerable water flow such as harbour mouths (Willan,
1993). Comparison:
ee G. lessoni. Synonymy:
Previously recognised synonyms are Psammobia angusta Deshayes, 1855, Psammobia menkeana Deshayes, 1855, Psammobia temperata Cotton & Godfrey, 1938,
Milligaretta venta Iredale, 1936. Fig.
1:
East of Botany Bay, NSW, in 73 m (C.143431) |
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