A new macradeninine, Zebrasomatrema pichelinae n. g., n. sp (Digenea : Lecithasteridae), from tangs (Perciformes : Acanthuridae) off the southern Great Barrier Reef, Queensland, Australia

A new genus, Zebrasomatrema, with the type-species Z. pichelinae n. sp., is described from Zebrasoma veliferum at Heron and Lizard Islands, Queensland , Australia, and Z. scopas, Acanthurus lineatus and A. triostegus at Heron Island. The new genus shares with Acanthurotrema an anterior flange, 14 sub globular vitelline lobes, a divided seminal vesicle and a long aglandular d uct joining the seminal vesicle and the short pars prostatica, but differs in its quadripartite seminal vesicle, single vitelline field, lack of a sin us-sac and excretory arms which unite in the forebody. This report constitu tes the first record of a macradeninine lecithasterid in Australian waters. A key to the Macradenininae is presented.