Halgerda okinawa from Lembeh Straits

March 2, 2003
From: Dave Behrens


Bill,
Have wanted to correct the range on Halgerda okinawa but didn't have photo documentation to back up the claim. H. okinawa is a casual occurrence in the Lembeh Straits of Indonesia in addition to the type locality in Okinawa. The attached photographs are by Carine Schrurs and Constantinos Petrinos. Con reports - During a dive at a dive site called NUDI RETREAT we located several Halgerda okinawa within an area of 10 meters at a depth of 42.5 meters.
My best,
Dave Behrens
Sea Challengers

info@seachallengers.com

Behrens, D., 2003 (Mar 2) Halgerda okinawa from Lembeh Straits. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/9322

Thanks Dave,
These animals certainly match the colour of the Okinawan specimens except for the absence of the black lines on the ridges. The broken black rings near the mantle edge, which are so well developed in this Indonesian animal, seem to definitely link it to the Okinawan animals, one of which shows markings which could easily be derived from these rings. This is an interesting find.
Cheers,
Bill Rudman

Rudman, W.B., 2003 (Mar 2). Comment on Halgerda okinawa from Lembeh Straits by Dave Behrens. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/9322

Factsheet

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