OKINAWAN
OPISTHOBRANCH OF THE WEEK

Plocamopherus sp. 2 (size not recorded)

Opisthobranch of the Week Data

Taxonomy:

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


Species Account:

        Plocamopherus sp. 2 is considered to be very rare in the waters off Okinawa's main island as I have seen and collected only the above single individual. The above image is one which was taken here many years ago (1984) and unfortunately the specimen has been lost and the collection data, including that of the habitat, is at best spotty. There are three pairs of prominent lateral processes on the notal brim bearing "globes" which are capable of light emission flashes by members of the genus. Flashes of light, however, were not noted to occur in the above specimen.

        Plocamopherus sp. 2 is similar in appearance to P. fulgurans Risbec, 1928. There is an illustration of P. fulgurans posted on the Sea Slug Forum by Bill Rudman (1999) in commenting on an unknown Plocamopherus species from the Philippines submitted by Mike Miller, as follows:

Your species could possibly be Plocamopherus fulgurans Risbec, 1928, described from New Caledonia. The colour painting (Plate IV fig 4) . . . has similarities, but I'm afraid that many of Risbec's paintings, done by his father, don't bear much relationship to Risbec's written descriptions. The written description describes a brownish-yellow body with transparent whitish papillae and he does describe the main anatomical features.

        Previously I've featured several members of the genus Plocamopherus on these pages and as of the current date, there are several described and undescribed species reported from Okinawan waters. These featured animals are as follows:

  • P. ceylonicus
  • P. imperialis
  • P. maculatus
  • P. tilesii
  • P. species 1
  • P. species 2 (the above featured animal)
  • P. species 3
  • Literature Cited:


    Page Date: 25 Oct '04
    Page Modification Date: 19 Mar '12
    Digitally manipulated photo
    Copyright © 2012 Robert F. Bolland