Pterymarchia bipinnata (Reeve, 1845)
46mm

Pterymarchia bipinnata is moderately rare in the Marshalls, or at least is rarely seen. Specimens have been found under rocks on lagoon reefs and pinnacles, as well as on the seaward reef, at depths from about 6 to 30m.

Here's a heavily encrusted shell.

The attractive animal pattern is similar to Pterymarchia martinetana and Pterynotus elongatus, but not to Pterymarchia triptera.

Created 1 October 2010
Updated 11 September 2011

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