March 24, 1999
From: Bill Rudman
While looking at literature on Costasiella I came across the following abstract on chemical defence in an unnamed species of Costasiella from India. I thought this was of particular interest following Clay Carlson & Patty Jo Hoff's comment that most species of Costasiella in Guam feed on Avrainvillea. I quote part of the abstract below:
Chemical Defence of the specialist ascoglossan Costasiella sp. from the Indian Coast.
"... The present study records the distribution of the herbivorous ascoglossan molluscs, Cosatasiella sp. feeding exclusively on the chemically defended green algae Avrainvillea erecta. This algae contains avrainvilleol, a brominated diphenyl methane derivative which deters herbivores ... known palatable algae coated with the diethyl ether extracts of both Avrainvillea and Costasiella deterred herbivorous fishes significantly. ... Either the whole organism or the egg mass of Costasiella was avoided by carnivorous fish.
Padmakumar, K. 1996. Chemical Defence of the specialist ascoglossan Costasiella sp. from the Indian Coast. Proceedings of the 6th Workshop of the Tropical Marine Mollusc Programme (TMMP). Phuket Marine Biological Center Special Publication, 16: 326.
Bill Rudman.Rudman, W.B., 1999 (Mar 24). Comment on Chemical defence in Costasiella by Bill Rudman. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/716
Costasiella sp. 1.? from Okinawa.
From: Yasuhiro Shamoto, August 14, 2007
Re: Costasiella from Hawaii
From: Clay Carlson, November 17, 2003
Costasiella from Hawaii
From: Dan Barshis, November 16, 2003
Costasiella from Okinawa
From: Atsushi Ono, April 28, 2002
Re: Costasiella sp. 1 from Hawaii
From: Kathe R. Jensen, February 7, 2002
Costasiella sp. 1 from Hawaii
From: Cory Pittman, February 6, 2002
Costasiella sp. 1. from South Africa
From: Valda Fraser, February 5, 2002
Costasiella sp. 1 from South Africa
From: Lindsay Warren, February 5, 2002
Costasiella sp. 1 from Sulawesi
From: Lindsay Warren, July 28, 2000
Re: Colour in Costasiella
From: Clay Carlson & Patty Jo Hoff, March 25, 1999
Costasiella sp. 1. from Guam
From: C Carlson & P.J. Hoff, March 23, 1999
Costasiella sp from Sulawesi
From: Lindsay Warren, March 20, 1999