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brown
 



 
Omalogyra japonica
(Habe, 1972)
 
Omalogyra japonica: shell
Maximum size:  0.7 mm shell diameter.

Identification:  This species has a tiny, planispiral shell with a smooth periphery. There are fine axial ribs that vary in development. Some shells are light brown, others cream with three narrow brown bands.

Natural history:  Shells of Omalogyra japonica are moderately rare in beach drift. Live animals are occasionally found in shallow rocky habitats. Kay (1979) states that shells have been found in sand samples to depths of 100 m (328 ft).

Distribution:  Maui, Oahu and Midway (banded form): also known from Japan and Fanning Island.

Taxonomic notes:  There's a chance that banded and brown forms might be different species but there doesn't seem to be any morphological difference between the shells.

Photo:  CP: composite photo, same shell; 0.7 mm in diameter; banded: beach drift, Mokuleia Bay, Maui; fall, 1985.

Observations and comments:

Note 1:  ( )
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