Rostanga sp. 3 (25mm)
OPISTHOBRANCH OF THE WEEK
Photo by Jeffrey E. Heitchler
Opisthobranch of the Week Data
Frequency on Okinawa:
- Order: NUDIBRANCHIA
- Suborder: Doridina
- Family: Dorididae
[brackets indicate range for all Okinawa-collected specimens of the species]
- Individual Collection No: Photo only, w/o specimen
- Location: Maeda-misaki (Maeda Point), Okinawa (26o 26.5'N, 127o 46.9'E)
- Date: 27 June, 2018
- Depth: 20ft (6m) [only a single animal seen and not collected]
- Water temperature at collection depth: Not recorded
- Size: TL 25mm
- Specimen deposited: Photo only, without specimen
- Photo Data: Olympus TG4, no attached macro lens, set to microscope mode
Rostanga sp. 3 is considered to be very rare in Okinawan waters. I've never personally seen this attractive animal myself and the photographer, Jeffrey E. Heitchler, reports seeing only the above featured animal. It's currently known from four locals, Indonesia, Papua New Guinea, mainland Japan, and more recently from Okinawa.
There are two photographs of this currently undescribed opisthobranch in Gosliner, et al 2015, p.200, from Papua New Guinea. Also, Rie Nakano, 2018, has a photo of it on p. 263 of her latest book. In addition, Jim Black has an image of this attractive 'branch from Lembeh, Indonesia, seen on Mike Miller's Slug Site.
Previously I've featured on these pages two additional unknown Rostanga species from Okinawan waters:
Rostanga sp. 1
Rostanga sp. 2
- Gosliner, T.M., Valdés, Á and Behrens, D.W. 2015. Nudibranch and Sea Slug Identification - Indo-Pacific. New World Publications, Inc., Jacksonville, Florida.
- Miller, Mike. Slug Site. Available from: https://slugsite.tierranet.com/.
- Nakano, Rie. 2018. Field Guide to Sea Slugs and Nudibranchs of Japan. Bun-ichi Co., Ltd.
I've added a second page w/ a series of images of the species.
Many thanx to Jeffrey for supplying the photos and associated information for this feature.
Page Date: 10 Sep '18
Page Modification Date: 10 Sep '18
Copyright © 2018 Robert F. Bolland