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Philine auriformis Suter, 1909
NEW ZEALAND SEA-SLUG
Philine constricta auriformis Suter, 1909

Life   Mollusca   Gastropoda   Opisthobranchia   Philinidae   Philine


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Philine auriformis


Philine auriformis Suter, 1909

A new slug continues to make its presence known in California waters three years after it was first reported back in 1995. Its name is Philine auriformis , and it was introduced from New Zealand. It looks very much like Philine bakeri (species # 23 in Pacific Coast Nudibranchs, Behrens 1991), up to 1 1/2 inches in length, except that when it stretches out, giving the appearance of a fat white Navanax. It occurs in shallow water up to intertidal, on mud, sand and shell debris bottoms. Gosliner (1995) reported it from south San Francisco Bay where it appears to be one of the most numerous species on the bay's bottom. It is a voracious carnivore feeding on small clams and worms. The egg masses are large white spirals, and it apparently likes California, successfully reproducing for several years now. In Bodega Bay as many as 18 per square meter have been observed. It is also been found in Elkhorn Slough, Morro Bay, Monterey Bay, and as far south as San Diego. Our colleagues are interested in tracking its expansion because of the potential damage to balanced populations this new introduction brings.

For an excellent discussion on the biology of Philine auriformis, please see a recent posting on Dr. Bill Rudman's Sea Slug Forum !


Reference

Gosliner, T.M. 1995. Introduction and Spread of Philine auriformis (Gastropoda: Opisthobranchia) from New Zealand to San Francisco Bay Bodega Harbor . Mar. Biol. (Berlin) 122(2):249-255.[N]
Text courtesy of Dave Behrens
Photo of Philine auriformis couresty of Dr. Terry Gosliner

David W. Behrens

Author: Pacific Coast Nudibranchs
Co-Author Coral Reef Animals of the Indo Pacific
Propriator of Sea Challengers Natural History Books !

Send Dave mail at seachalleng@earthlink.net


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