Three new species of Callulops (Anura: Microhylidae) from western New Guinea

Various works in recent years have shown that the microhylid genus Callulops is not a monophyletic group, and that the "central species" Callulops robustus is not, as previously assumed, distributed over the entire island of New Guinea. Further, Callulops robustus apparently does not occur in the northwestern part of the island. This species is there replaced by a number of other species, and at present no sympatric occurrence of species in the C. robustus-group are known. On the basis of our own collections in the Wondiwoi Mountains at the base of the Wandammen Peninsula as well as on the islands of Yapen and Biak (Cenderawasih Bay) in the years 1998 to 2003, we here describe three new species in the Callulops robustus-group.