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Rissoella
sp. #1

 
Rissoella sp. #1
Maximum size:  1 mm shell length.

Identification:  This species has a very small, transparent-white shell with an angled umbilicus. It has a more slender profile than the other Rissoella shells from Hawaii. Live animals are cream with diffuse gray-black and white patches.

Natural history:  Shells of Rissoella sp. #1 are rare in beach drift. Live animals are occasionally found in shallow rocky habitats.

Distribution:  Maui; fall, 1991.

Taxonomic notes:  Assigning these shells to the live photo is somewhat uncertain. Also, slenderer shells may include more than one species since there is quite a bit of variation in protoconch size within the small available sample (including between the right and left shells in the photo).

Photo:  CP: Maui: fall, 1991.

Observations and comments:

Note 1:
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