Tambja tentaculata from Guam

August 18, 2005
From: Clay Carlson & Patty Jo Hoff

Dear Bill,
To complete the Tambja collection from Pola et al (2005) [see #14574] here is Tambja tentaculata

Locality: Apra Harbor, Western Shoals, Guam, 8 m; 11 July 2003. 20 mm. Carlson & Hoff -D.188. Found associated with the the red & yellow gorgonian (Acabaria?) in the background.

It is difficult to tell whether the animals found in the harbour are here naturally or were introduced due to the heavy shipping.

Clay Carlson & Patty Jo Hoff

clay.carlson@kuentos.guam.net

Carlson, C. & Hoff, PJ, 2005 (Aug 18) Tambja tentaculata from Guam. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/14591

Dear Clay & Patty Jo,
Thanks for this photo of what is at present a rare species, known only from Apra Harbour. Perhaps the publicity will bring a few more records to light from elsewhere. I have included a close-up of the head alongside because it shows the large enrolled oral tentacles which gave this species its name. These tentacles are more characteristic of a species of Roboastra then a species of Tambja. In your photo you can also see the 'lateral slot' as a dark line midway between the rhinophores and the oral tentacles.

As I mentioned when recently discussing Tambja gratiosa [message #14519], the long Roboastra-like oral tentacles in T. tentaculata, which on all other anatomical features is a species of Tambja, may explain the similar long tentacles in T. gratiosa, which was reported by Bergh to have radular teeth characteristic of Tambja.

While preparing a Fact Sheet for this species, and adding it to the Tambja affinis colour group page, I noticed its very close similarity in colour to Tambja olivaria. I wonder if the enrolled oral tentacles can partly unroll? If so they would look very like the large flaps in the photos of  T. olivaria on the Fact Sheet for that species.

Best wishes,
Bill Rudman

Rudman, W.B., 2005 (Aug 18). Comment on Tambja tentaculata from Guam by Clay Carlson & Patty Jo Hoff. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/14591

Factsheet

Tambja tentaculata

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