Kaloplocamus acutus from Hong Kong

February 5, 2002
From: Bill Rudman & Brian Darvell


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

The head shield or veil is not as pronounced as in Plocamopherus but the six branched papillae are much longer when extended. There are four branched papillae down each side of the body and a slight ridge between them denotes the mantle edge. The body ranges in colour from pale yellow-orange to a deep orange red. The branched papillae have translucent white stalks with some scattered opaque white pigmentation, and the pointed branches are bright orange or orange-red. There are scattered white specks on the body. Unlike Plocamopherus the papillae do not have a terminal sphere. This species, which can grow to 25 mm in length, probably feeds on bryozoans.

PHOTO:
UPPER: AM C 146976, 2 specimens, 24 March 1985, Site 8.14, Basalt Is. (SW), 18 m. LOWER: AM C150287, 18 April 1986, Site 4.59, Gau Tau (N), Mirs Bay, 17 m, Hong Kong. Photos: Brian Darvell.

Hong Kong Collection Records:
AM C139167, 2 specimens, 12 April 1983, Site 2.61, Bluff Head, Tolo Channel, 4-7 m. AM C139168, 13 April 1983, Site 4.65, Chek Chau (NE), Mirs Bay, 2-6 m. AM C139169, 2 specimens, 13 April 1983, Site 5.16, Chek Chau (W), Mirs Bay, 2-5 m. AM C 1 39170, 4 specimens, 17 April 1983, Site 5.75, Chu Ma Pai, Tolo Channel, 3-14 m. AM C140171, 24 July 1983, Site 11.87, South Ninepin (SE), 14 m. AM C142186, 31 March 1984, Site 10.99, Kiu Tau (W), Kiu Tsui Chan, Port Shelter, 4 m. AM C142187, 21 April 1984, Site 10. 103, Pak Ma Tsui (Bay), Port Shelter, IO m. AM C 146976, 2 specimens, 24 March 1985, Site 8.14, Basalt Is. (SW), 18 m. AM C150287, 18 April 1986, Site 4.59, Gau Tau (N), Mirs Bay, 17 m. AM C 1 50288, 20 April 1986, Site 2.127, Cock's Head Rock, Mirs Bay, 7 m. AM C153709, 11 July 1987, Site 11. 1 8 1, Duck Rocks (S), Port Shelter, 15 m. Depth range: 2-18 m.

Reference:
• 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 5) Kaloplocamus acutus from Hong Kong. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/6025

Factsheet

Kaloplocamus acutus

Related messages

  1. Kaloplocamus acutus from Port Stephens
    From: Leanne & David Atkinson, February 4, 2008
  2. Kaloplocamus acutus from Philippines
    From: Jeff Rosenfeld, September 12, 2005
  3. Kaloplocamus acutus from South Korea
    From: Dong Bum Koh, February 5, 2005
  4. Kaloplocamus acutus from Hong Kong
    From: Leslie Chan, July 11, 2001

Show factsheet and all related messages