Hopkinsia pilosa from Hong Kong

February 4, 2002
From: Bill Rudman & Brian Darvell

Here is some information and photos on Hopkinsia pilosa from Brian Darvell's Hong Kong collections.

The body is translucent white with a close speckling of dark brown and an irregular fine network of white. The round flattened body is very similar to Hopkinsia plana but there are many more of the finger-like papillae in H. pilosa than in H. plana. They are fairly transparent in colour with dark brown specks and some white specks. The papillae are arranged in a series of irregular rows around the mantle edge. The central part of the mantle is smooth except for one central papilla and one on each side. The rhinophores and gills are somewhat elongate, looking much like the papillae. The animals are about 10 mm long and feed on encrusting bryozoan colonies on which they are found.

AM C 141494, 6 specimens, 24 February 1984, Site 14.41, Tai Tam Harbour, Hong Kong Is., 0. 5 m. Photos: Brian Darvell.

Hong Kong Collection Records:
(1) AM C139137, 18 specimens, 1 April 1983, Site 4.59, Gau Tau (N), Mirs Bay, 5-12 m. (2)AM C139138, 2 specimens, 13 April 1983, Site 4.65, Chek Chau (NE), Mirs Bay, 2-6 m. (3) AM C 141494, 6 specimens, 24 February 1984, Site 14.41, Tai Tam Harbour, Hong Kong Is., 0. 5 m. (4) AM C141495, 25 February 1984, Site 10.99, Kiu Tau (W), Kiu Tsui Chan, Port Shelter, 4-7 m. (5) AM C150284, 14 April 1986, Site 2.61, Bluff Head, Tolo Channel, 2 m. Depth range 0.5-7 m.

• Rudman, W.B. & Darvell, B.W. (1990) Opisthobranch molluscs of Hong Kong. Part 1. Goniodorididae, Onchidorididae, Triophidae, Gymnodorididae, Chromodorididae, (Nudibranchia). Asian Marine Biology, 7: 31-79

Best wishes,
Bill Rudman & Brian Darvell

Rudman, W.B. & Darvell, B.W., 2002 (Feb 4) Hopkinsia pilosa from Hong Kong. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/6007


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