We describe Monorchis lewisi n. sp. (Monorchiidae) from the surf bream, Acanthopagrus australis (Gunther, 1859) (Sparidae), in Moreton Bay, eastern Australia. The new species differs from most existing species of Monorchis Monticelli, 1893 in its possession of an elongate I-shaped excretory vesicle, and from other congeners in the relative configuration of the gut and suckers. Ovipusillus mayu Dove & Cribb, 1998 is re-reported from Gnathanodon speciosus (Forsskal, 1775) (Carangidae) from Moreton Bay. We report new second internal transcribed spacer (ITS2) and 28S rDNA sequence data for both species. Bayesian inference and Maximum Likelihood analyses of the 28S rDNA dataset suggest that existing subfamily and genus concepts within the family require substantial revision.
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VIRGINIA INST MARINE SCI,COLL WILLIAM & MARY,CHESAPEAKE BAY NATL ESTUARINE RES RESERVE,GLOUCESTER POINT,VA 23062VIRGINIA INST MARINE SCI,COLL WILLIAM & MARY,CHESAPEAKE BAY NATL ESTUARINE RES RESERVE,GLOUCESTER POINT,VA 23062
HUDSON, DA
SHIELDS, JD
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VIRGINIA INST MARINE SCI,COLL WILLIAM & MARY,CHESAPEAKE BAY NATL ESTUARINE RES RESERVE,GLOUCESTER POINT,VA 23062VIRGINIA INST MARINE SCI,COLL WILLIAM & MARY,CHESAPEAKE BAY NATL ESTUARINE RES RESERVE,GLOUCESTER POINT,VA 23062