OKINAWAN
OPISTHOBRANCH OF THE WEEK

Kaloplocamus ramosus (Cantraine, 1835) 12mm
Photo by Atsushi Ono

Opisthobranch of the Week Data

Taxonomy:

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


Species Account:

        Kaloplocamus ramosus is unknown from Okinawa's main island as of early-December, 2006, but the close proximity of Okinawa, as well as the similar opisthofauna to that of the Kerama Islands, suggests the possibility that it is also present here on the main island of Okinawa. The above featured animal was photographed and collected from Agonoura Bay, 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 January of 1999 in 5m of water from a rope. Atsushi's photograph is used here with his kind permission. It should be noted that Atsushi considers the species to be rare in the Kerama Islands as he has seen only several individuals (per. comm.). I've included a photograph of a second individual, also photographed in the Keramas by Atsushi.

        The only other described Kaloplocamus species from the waters of Okinawa's main island of which I'm aware of are K. acutus and K. peludo.

        Bill Rudman (2002) in a recent comment to Gareth Jones in the Sea Slug Forum, concerning the distribution of K. ramosus, points out the following:

It is found in southeastern Australia and similar animals are reported in the Forum from Hong Kong. True K. ramosus is from the Mediterranean, so if this Pacific animal is the same, it probably got here as a hitchhiker on the bottom of a boat. It feeds on encrusting bryozoans which could easily foul a ship's hull and provide a home, and food, for a fellow traveler.

Etymology:

Literature Cited:


Page Date: 26 Aug '02
Page Modification Date: 04 Dec '06
Digitally manipulated photo
Copyright © 2006 Robert F. Bolland