Diacria major (Boas, 1886)
|Maximum size: 7.5 mm shell
Identification: This species has transparent shells edged in amber. They are broadly
diamond-shaped and are usually decapitate with the broken apex closed
by a septum. They resemble shells of Diacria trispinosa
but the lateral spines point toward the apex and the portion of the shell apical to the lateral spines is relatively wide.
Fragments of Diacria major shells are
common in sand samples.
Maui, French Frigate Shoals and Midway: circumglobal.
Taxonomic notes: Intact shells and most fragmentary material from Hawaii seem closer to Diacria major than to D. trispinosa
as illustrated in Janssen, et. al. (2019). The shell
illustrated in Kay, 1979 as D. trispinosa also seems closer to D. major though it's
CP: composite photo, same shell; 7.5 mm: from dredged sand
expedition; French Frigate Shoals; Oct. 17, 2006.
Observations and comments:
1: ( )