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Turbonilla thaanumi
Pilsbry & Vanatta, 1908
 
Turbonilla thaanumi: shell
Maximum size:  3.8 mm shell length.

Identification:  The shell of this species is similar to that of  Turbonilla kahoolawensis but with fewer axial ribs.

Natural history:  The illustrated shell is the only one we've seen on Maui. Kay (1979) states that live animals have been found in the byssus of Isognomon perna.

Distribution:  Maui and Oahu.

Taxonomic notes:  The illustrated shell seems to be a good match for the photo is Kay but is somewhat larger than her description suggests for the species.

Photo:  CP: 3.8 mm: beach drift, Hekili Point, Maui; fall, 1979.

Observations and comments:

Note 1:  ( )
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