Subcuthona pallida Baba, 1949 (ca. 6mm)

Opisthobranch of the Week Data


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

Species Account:

        Subcuthona pallida is considered to be very rare in the waters of Okinawa's main island as I've seen and collected only the above single featured animal. The animal was collected from seventy-five feet in an area of mixed sand and coral rubble near the reef forefront. It was initially found embedded in a slab of coral rubble and as the animal was tightly attached to the rubble, the slab of rubble containing the aeolid was cut off with a knife and placed into a zip-loc bag. Later at home the animal had crawled from the rubble and it was subsequently noted that the foot would very tightly adhere to any substrate it was placed upon.

        Furthermore, I've added a second page with three additional images of the above animal as well as an image taken from Baba (1949).

        Subcuthona pallida was described by Baba in August of 1940, based on two specimens collected from shallow waters of Hayama, Sagami Bay, Japan. The following species description is taken from Baba (1949, p. 176):

Very small, about 2 mm in length. With cephalic tentacles and rhinophores, the latter simple. A row of (6) fusiform, more or less inflated papillae on either side of the back. Ramifications of liver fundamentally as in Cuthona: 3 anterior papillae on the right side belonging to the right liver, the partner on the left side to the left liver, and the remaining papillae to the posterior liver, respectively. Genital orifice below the 2nd papilla on the right side, anus in front of the 4th papilla on the same side. Foot corners rounded. Body bluish-white. A faint yellow colour of the liver system in the body and in the papillae is visible through the transparent skin.


Literature Cited:

Page Date: 20 Mar '06
Page Modification Date: 20 Mar '06
Digitally manipulated photo (image has been horizontally flipped)
Copyright © 2006 Robert F. Bolland