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Heliacus sterkii
(Pilsbry & Vanatta, 1908)
 
Heliacus sterkii
Maximum size:  7 mm shell diameter (Severns, 2000).

Identification:  The shells of this species are flat and brown, blotched with cream. They may be distinguished from the shells of Heliacus implexus by their darker color, more numerous marginal brown spots and the presence of three cords on the margin. The animal is translucent gray with black and opaque-white flecks.

Natural history:  Shells of  Heliacus sterkii are moderately common in beach drift. Live animals are occasionally found in shallow rocky habitats.

Distribution:  Maui, Kauai and French Frigate Shoals.

Taxonomic notes:  It's probably also listed as Heliacus sp. in Severns, 2011 (the shell illustrated under that name appears to be a worn H. sterkii).

Photo:  CP: Airport Beach, Maui; Oct. 31, 2007.

Observations and comments:

Note 1:  ( )
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