OKINAWAN
OPISTHOBRANCH OF THE WEEK

Dermatobranchus albus (Eliot, 1904) 14mm

Opisthobranch of the Week Data

Taxonomy:

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


Species Account:

        Dermatobranchus albus, a small and beautiful arminid, is considered to be uncommon on Okinawa; the first animal was collected in early May, 1987, and since that date, an additional seventeen specimen have been collected through mid-June, 2001.

        I've included a second page with five additional images of D. albus. The first of these images is a lateral view of the same individual as the featured animal above, showing a bit more detail than that of the dorsal aspect above; the additional four images are of different specimens of the Okinawa animals.

        As of the current date (Early-April, 2014) thirteen described species of Dermatobranchus from Okinawa's main island and the Keramas are featured on these pages. These thirteen species are:

  • D. albus - The featured animal above
  • D. caeruleomaculatus
  • D. cymatilis
  • D. dendronephthyphagus
  • D. diagonalis
  • D. fasciatus
  • D. fortunatus
  • D. funiculus
  • D. gonatophora
  • D. oculus
  • D. ornatus
  • D. primus
  • D. rodmani
  • In addition, I also have a series of undescribed Dermatobranchus species from local waters.

            In a recent posting on the Slug Forum Lindsay Warren (2001) has several earlier descriptions of the species by Eliot and Edmunds & Thompson. These earlier descriptions seem to agree with the Okinawan material, at least in external characteristics (I've not as yet seen the internal anatomy). Also, one of the two tiny photo receptors (eye spots) are seen in the above featured animal on the white base of the left rhinophore.

    Literature Cited:


    Page Date: 18 Jun '01
    Page Modification Date: 01 Apr '14
    Digitally manipulated photo
    Copyright © 2014 Robert F. Bolland