The Andean Dichroplini: cladistic analysis with description of Keyacris n. gen. and Ponderacris n. gen. (Orthoptera: Acrididae:

RONDEROS, A.R.; CIGLIANO, M.M.

TRANSACTIONS OF THE AMERICAN ENTOMOLOGICAL SOCIETY

AMER ENTOMOL SOC

Año: 1991 vol. 117 p. 167 - 191

0002-8320

The genus Keyacris is proposed for two new species of Dichroplini Acrididae: Melanoplinae) that are endemic to the bolivian Yungas: Keyacris palidiventerand Keyacris striativenter. Keyacris is placed in the Andean Dichroplini generic group, here established, along with Bogotacris Ronderos, Chibchacris Hebard, Boliviacris Ronderos & Cigliano, Baeacris Rowell & Carbonell, the Dichroplusperuvianus species group Ronderos & Carbonell, and the Dichroplus punctulatus species group Carbonell & Ronderos. The Andean Dichroplini are here considered to be a monophyletic group (justified by synapomorphies of the male genitalia) which is closely related to Timotes Roberts, the outgroup in our phylogenetic analysis. Based on the cladistic analysis presented for the Andean Dichroplini, Chibchacris is hypothesized to be the sister genus of Keyacris; the Dichroplus punctulatus species group is transferred to the genus Baeacris; and the new genus Ponderacris is established to include the Dichroplus peruvianus species group. A key to the genera included in the Andean Dichroplini is also provided.