OKINAWAN
OPISTHOBRANCH OF THE WEEK

Syphonota geographica (Adams & Reeve, 1850) 6mm
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:

        The above featured little aplysiid, Syphonota geographica, was photographed by Atsushi Ono from the waters of Aka Island in the Kerama Islands, 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 during May of 2003. Atsushi (pers. comm.) reports that at least one of the two observed animals was found on the green thallophyte, Halophila ovalis and also mentions seeing only two individuals, but has collected only a single specimen (the above is "photo only") and he of course considers the species to be rare in the Keramas. The single collected animal was 3mm in length, from Zamami Island. A photo of the 3mm animal is shown in Ono (2004, p. 83). I've found no specimens of S. geographica in the waters of Okinawa's main island as of late August, 2004.

        Bill Rudman (2004) reporting in the Sea Slug Forum mentions that S. geographica "is another species from the Indo-West Pacific which has apparently made it through the Suez Canal into the Mediterranean - another lessepsian migrant."

Etymology:

Literature Cited:


Page Date: 30 Aug '04
Page Modification Date: 30 Aug '04
Digitally manipulated photo (image has been horizontally flipped)
Copyright © 2004 Robert F. Bolland