Abstract
Four species of Cardiodactylus efordi Otte, 2007 species group are studied here based on new material collected from recent fieldwork in New Guinea. Cardiodactylus minuta Bhowmik, 1981 and Cardiodactylus nigris Bhowmik, 1981 are redescribed. The calling songs of Cardiodactylus javarere Otte, 2007, Cardiodactylus minuta and Cardiodactylus nigris are described here, whereas that of Cardiodactylus busu Otte, 2007 is redescribed.
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