1991 Volume 57 Issue 4 Pages 743-746
From one of highly unpalatable red algae Plocamium leptophyllum for the marine herbivorous gastropod Turbo cornutus, halogenated monoterpenes were isolated as potent feeding inhibitors against not only this herbivorous gastropod but also other herbivores including the abalone Haliotis discus, the top shell Omphalius pfeifferi and the sea urchin Strongylocentrotus intermedius. One of them was identified by spectroscopic analysis as aplysiaterpenoid A which was previously isolated from the red alga P. telfairiae as well as the sea hare Aplysia kurodai.