New species of Macrobaris Champion grass weevils from the New World tropics and subtropics (Coleoptera, Curculionidae, Baridinae)

Abstract

Macrobaris Champion is synonymized with Iops Casey (new synonym), transferred from Baridini: Baridina to Apostasimerini: Madopterina (new placement), and revised. Twenty one species are documented from fourteen countries, ranging from the USA in the north to Paraguay in the south. Thirteen new species are described: M. acutipennis new species (Mexico), M. aquilonia new species (USA), M. balicosa new species (Guyana, Suriname, Venezuela), M. colemycter new species (Mexico), M. exerens new species (Venezuela), M. laciniosa new species (Mexico), M. lateriquetra new species (Costa Rica, Panama), M. leptochele new species (Peru), M. runa new species (Panama, Peru), M. spinigera new species (Brazil, Venezuela), M. stictica new species (Ecuador, Peru), M. unguiculus new species (Ecuador), and M. zacatensis new species (Costa Rica). Iops bicolor Hustache is excluded from the genus and transferred to Madopterina incertae sedis (new placement). Five species were collected from Poaceae, four of them from bamboos. A dichotomous key for the identification of currently known species is provided, with M. sparsa Casey treated as a morphologically unresolved complex. Limnobaris rufula Champion is transferred to Valdenus Casey, as V. rufulus new combination, and is reported from Costa Rica for the first time.