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Cingulina
sp. #1

 
Cingulina sp. #1: shell
Maximum size:  8 mm shell length (Kay, 1979).

Identification:  This species has an elongate conical shell with three prominent, smooth cords on each whorl. There is a single fold on the columella. It differs from Oscilla indica in it's larger size and in having four rather than six cords on the final whorl.

Natural history:  Shells of Cingulina sp. #1 have been found in highly protected sites on Oahu such as Kaneohe Bay and Pearl Harbor. (Kay, 1979)

Distribution:  Oahu.

Taxonomic notes:  Kay, 1979 treats this species as a form of Oscilla indica (listed as Hinemoa indica). However, the presence of only four cords on the final whorl, larger size and different habitat place it in Cingulina. (John van Aartsen, pers. com.) It's illustrated as Hinemoa indica in Fig. 32 of Kay, 1979.

Photo:  CP: 4.9 mm: sand sample, 1-3 m (3-10 ft), Kaneohe Bay, Oahu; Oct. 3, 1998.

Observations and comments:

Note 1:  ( )
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