Lonoa aff. hawaiensis Dall, Bartsch & Rehder, 1938

Raines, Bret & Huber, Markus, 2012, 3217, Zootaxa 3217, pp. 1-106 : 83

Lonoa aff. hawaiensis Dall, Bartsch & Rehder, 1938

Figures 42 A–C

Lonoa hawaiensis Dall et al.,1938: p. 179 , pl. 46, figs. 5–8.

Lonoa hawaiensis Dall et al.,1938 — Kay, 1979: p. 565, fig. 183 I; Paulay, 1987: p. 16; Preece, 1995: p. 351; Tröndlé & Boutet, 2009: p. 9: Severns, 2011: p. 476, pl. 218, fig. 5.

Material examined. A single articulated specimen (1.5 mm) (BK).

Diagnosis. Shell very small (1.5 mm in height), ovate, translucent, fragile, with posteriorly placed small, pointed umbones. Exterior surface glossy, growth lines with irregularly placed weak radial streaks. Hinge consisting of a strong single and a split cardinal, the cardinals comparatively large, the split cardinal posterior in the RV and anterior in the LV, hinge plate non-indented; no laterals.

Remarks. This unique and very strong hinge was not encountered in any other EI species. From the hinge structure galeommatids are excluded. Most of the traits in shape, sculpture and hinge are shared with the genus Lonoa . A very juvenile Lonoa species can at present not be excluded.

Habitat. Dredged at 30–80 m in fine sand, off the western coastline near Tahai, EI, 27°07’20” S, 109°26’30” W.

Distribution. Lonoa hawaiensis was originally described from the Hawaiian Islands, but has been recorded from the Cook Islands, Society Islands, Austral Islands, Pitcairn Islands and now possibly Easter Island— E5.