Limaria (Promantellum) parallela ( Dall, Bartsch & Rehder, 1938 )

Raines, Bret & Huber, Markus, 2012, 3217, Zootaxa 3217, pp. 1-106 : 46

Limaria (Promantellum) parallela ( Dall, Bartsch & Rehder, 1938)

Figures 22 F–H

Lima parallela Dall et al., 1938: p. 106 , pl. 27, figs. 9–12.

Limaria (Promantellum) fragilis ( Gmelin, 1791) — Rehder, 1980: p. 110.

Limaria (Promantellum) parallela ( Dall et al., 1938) — Severns, 2011: p. 460, pl. 210, fig. 2.

Material examined. Over two dozen single valves (2.8 to 8.6 mm) from EI and SyG (BK), plus specimens from the Hawaiian Islands ( MHU).

Diagnosis. Shell small, obliquely-elongate, equivalve, thin and fragile. Posterior and anterior margins parallel the last third of the shell, and with long gapes. Exterior surface consisting of 22–24 fine radial threads, which are crossed by finer commarginal striae. Ventral margin with serrated appearance. Hinge short and straight, with wide ligament. Color translucent white.

Remarks. Although Rehder (1980) was correct in selecting Promantellum , he misidentified this species as P. fragilis . The largest EI specimen slightly exceeds the 8 mm Hawaiian type specimen. However, Limaria (P.) fragilis ( Gmelin, 1791) grows up to 35 mm, lives in very shallow water and is distributed further west with an Indian Ocean type locality.

Habitat. Commonly found at many locations around EI and SyG, in sand and rubble, from 20–80 m.

Distribution. Limaria (Promantellum) parallela is currently known only from the Hawaiian Islands, Easter Island and Salas y Gómez Island— E2.