Re: Trivia californica vs Trivia solandri

December 4, 2006
From: Kevin Lee


Concerning message #16868:

To augment Bruce Wight's post in June, I have been meaning to share these images of Trivia solandri and Trivia californica, which I erroneously thought were opistobranchs, when I first sighted them. If memory serves correctly, I believe the shell lines do not cross the midrib in the case of T. solandri; whereas the lines do cross in the case of T. californica.
K:-)

Locality: A: Trivia solandri, Long Point, Catalina, 30 Maech 2005. B: T. solandri, Diver's Cove, Laguna Beach, 22 April 2005. C: californica, Outer Reef, Cress St., Laguna, Beach 05 February 2005.. All approx. 20 feet, all California, USA, Eastern Pacific, rocky reefs. Length: 1.5~2.0 cm. Photographer: Kevin Lee.

Kevin Lee

diverkevin@gmail.com

Kevin Lee, 2006 (Dec 4) Re: Trivia californica vs Trivia solandri. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/18710

Dear Kevin,
Thanks for these photos - but I know I shouldn't really delve deeply into snails, with so many unanswered sea slug messages. Breaking my own rules I decided to check your lines crossing / not crossing definition by a quick Google search and found that in T. solandri the lines don't seem to cross but that there is a complete confusion between T. californica Sowerby, 1832 and T. californiana J.E. Gray, 1827, often with the same image appearing under both names and images of shells with ridges crossing, not crossing, and partially crossing. I don't want to get caught up in a Trivia id exercise but it would be nice if someone could clarify if we have photos of T. californica or T. californiana.

Best wishes,
Bill Rudman

Rudman, W.B., 2006 (Dec 4). Comment on Re: Trivia californica vs Trivia solandri by Kevin Lee. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/18710

Factsheet

Triviidae

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