OKINAWAN
OPISTHOBRANCH OF THE WEEK

Okenia rhinorma Rudman, 2007 (3mm)
Photo by Atsushi Ono

Opisthobranch of the Week Data

Taxonomy:

Frequency in Okinawan waters: Collection Data:
[brackets indicate range for all Okinawa-collected specimens of the species]


Species Account:

        This attractive little goniodorid, Okenia rhinorma, is unknown from Okinawa's main island as of late-July, 2012. The above featured animal is one which was photographed and collected from an area composed of dead corals off Zamami Island, one of a series of islands in the Kerama Islands Group, which are located 30 ~ 40 kilometers west of the Okinawa capitol, Naha. This featured animal was photographed by Atsushi Ono during March of 2003 in five meters of water. Atsushi's photographs are used here with his kind permission. It should be noted that Atsushi considers the species to be very rare in the Kerama Islands as he has collected only a single specimen but has seen several additional individuals (pers. comm.).

        Jun Imamoto (2012) has a series of Okenia rhinorma images from several sites in Japan.

        There are to date the following four described species of Okenia, as well as two undescribed species known from Okinawan waters.

Etymology:

Literature Cited:


        * Keramas = the Kerama Islands Group, located 30 ~ 40 kilometers west of the Okinawa capitol, Naha.


Page Date: 30 Jul '12
Page Modification Date: 01 Jul '15
Digitally manipulated photo
Copyright © 2015 Robert F. Bolland