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shell, 6 mm
 

young shell, 3.7 mm
 

underside
 

crawling
 


young, underside
 



 
Psilaxis oxytropis
(A. Adams, 1855)
 
Psilaxis oxytropis
Maximum size:  16 mm shell diameter (Severns, 2000).

Identification:  Shells of this species are disc-like and smooth with the exception of marginal cords. They are cream with a broad spiral subsutural brown band and radiating brown lines. They may be distinguished from the shells of Psilaxis radiata by their larger protoconchs with brown staining. Live animals are translucent-cream with white flecks.

Natural history:  Shells of Psilaxis oxytropis are moderately rare in beach drift (mostly juvenile) but more common in deeper water. According to Kay (1979), it's typically found in sand at 50-66 m (180-216 ft).

Distribution:  Maui, Oahu, French Frigate Shoals and Midway: widely distributed in the Indo-Pacific.

Taxonomic notes:  It's listed in Kay, 1979 and Severns, 2000 as Philippia oxytropis A. Adams, 1855 (with some ambiguity in assignment of the photos in the latter source).

Photo:  CP: Wahikuli, Maui; March 31, 2014.

Observations and comments:

Note 1:  ( )
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