Sagaminopteron ornatum Tokioka & Baba, 1964 (ca. 12mm)
OPISTHOBRANCH OF THE WEEK
Opisthobranch of the Week Data
Frequency on Okinawa:
- Order: CEPHALASPIDEA
- Family: Gastropteridae
[brackets indicate range for all Okinawa-collected specimens of the species]
- Individual Collection No: RFB #2029
- Location: Seragaki (26o 30.4'N, 127o 52.6'E) [Horseshoe Cliffs & Seragaki]
- Date: 11 January, 1989 [11 specimens collected between Jan '88 & May '94]
- Depth: 20ft (6.1m) [5ft~45ft]
- Size: Unrecorded, photo only, ca. 12mm total length [8mm~17mm]
- Water temperature at collection depth: 73.6oF (23.1oC)
- Specimen deposited: Without specimen, photo only (different individuals of the species deposited at Cal Acad Sci).
Sagaminopteron ornatum should be considered uncommon on Okinawa. I have collected fifteen individuals and have seen, and in some instances photographed, but not collected, at least triple that number. All collected specimens were found at either Horseshoe Cliffs, or Seragaki in much the same habitat (mixed live/dead stony coral reef near the reef edge). These animals are occasionally found actively swimming in the plankton by flapping their wing-like parapodia.
Although the brilliant purple pigmentation of this strikingly beautiful cephalaspid is a strong advertisement to its presence, its diminutive size probably prevents most divers from seeing this delightful little animal.
Page Date: 07 Apr '97
Page Modification Date: 26 Feb '01
Digitally manipulated photo
Copyright © 2001 Robert F. Bolland