The taxonomy and biogeography of the nasuta group of the genus Baeturia Stål, 1866 (Homoptera, Tibicinidae)

The name nasuta group is proposed here for eight New Guinean species of the genus Baeturia Stål, 1866, for which a monophyletic origin is made plausible. Seven of these species are redescribed, and one, B. intermedia, is described as new. Distribution maps and a key to the males are presented. The nasuta group is mainly distributed in the mountain ranges of Central and SE New Guinea, which formed probably a part of the historic Inner Melanesian Arc. The one exception, B. parva, is restricted to the lower mountain ranges and lowlands of Northern New Guinea and New Britain, an alleged part of the Outer Melanesian Arc.