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Trivirostra edgari (Shaw, 1909)
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shell size
shows mature shells with form typical of T. hordacea from each site on left and mature shells with form typical of T. edgari from each site on right: Maalaea Bay T. hordacea range from 3.5-4.3 mm. Maalaea Bay T. edgari range from 6-8 mm. La Perouse Bay T. hordacea range from 4-6 mm. La Perouse Bay T. edgari is a single 5.5 mm shell.
Photo: CP: left 2 groups--beach drift; Maalaea Bay, Maui; 1979: right 2 groups--beach drift, La Perouse Bay, Maui; 1979. |
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