Observations on the Systematics and Biology of a Turrid Gastropod Assemblage in the British Virgin Islands
Abstract:Eight species of Turridae (Gastropoda: Prosobranchia) were collected from the upper surfaces of calcareous rocks lying in 2–4 m of water on fine calcareous sand at White Bay, Guana Island, near Tortola, British Virgin Islands (18°28′N, 64°34′W). The species are Drillia cydia (Bartsch, 1943), Strictispira paxillus (Reeve, 1845), Pyrgospira candace (Dall, 1919), Buchema interstrigata (E. A. Smith, 1882), Crassispira apicata (Reeve, 1845), C. pellisphocae (Reeve, 1845), Pilsbryspira albomaculata (Orbigny, 1842) and P. leucocyma (Dall, 1883). Their systematic positions and partial synonymies are given. Shell, feeding-related, reproduction-related and miscellaneous soft-part characters are compared. Foods, as analyzed from gut contents, of seven of the eight species from this microhabitat are recorded.
Strictispira and Crassispira have rather similar shells, but their foreguts are dissimilar. Radulae of different sizes and shapes are used to capture the same polychaete prey by three species.
A little-known ninth species, Fenimorea culexensis Nowell-Usticke, 1969, appears to replace Drillia cydia in a rather similar habitat in nearby Muskmelon Bay, Guana Island. Both these species appear to feed on Sipuncu]oidea. Fenimorea culexensis is figured and discussed but it is not included in the comparisons within the White Bay assemblage.
Document Type: Research Article
Publication date: April 1, 1983
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