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Abstract
Based on morphological and bioacoustic traits, two new species of the microhylid genus
Cophixalus Boettger, 1892 are described from the Raja Ampat Islands off the western
tip of New Guinea. Both are small (SUL < 23 mm), slender, scansorial species that
are morphologically most similar to Cophixalus tetzlaffi Günther and C. monosyllabus
Günther, two congeners also known only from far western New Guinea. Their description
brings the total number of Cophixalus known from New Guinea and surrounding islands
to 46, and the total number from western New Guinea (Papua and West Papua Provinces
including the Raja Ampat Islands) to 10. One Cophixalus specimen from Salawati Island
is considered a hermaphrodite because it has a well-developed vocal sac and vocal
slits, but also has an ovary containing eggs in an advanced developmental stage. This
frog uttered advertisement calls that did not differ from calls of conspecific males.
The first evidence of the genus Cophixalus from Misool Island is also documented.