A new species of Neoheterocotyle Hargis, 1955 (Monogenea: Monocotylidae) from the gills of Pristis clavata Garman (Pristidae) from Darwin, Australia.

摘要

Neoheterocotyle darwinensis sp. nov. is described and figured from between the secondary gill lamellae of the dwarf sawfish Pristis clavata collected at the mouth of Buffalo Creek near Darwin, Northern Territory, Australia. This is only the second monocotylid species to be described from northern Australia. N. darwinensis is distinguished from the other 7 valid species in the genus by the morphology of the hamuli, the dorsal haptoral accessory sclerites and the male copulatory organ. The similarities between N. darwinensis and Nonacotyle pristis from the gills of the freshwater sawfish Pristis microdon collected in Papua New Guinea are discussed.