Cuyabasa Bechyné, 1959

Roie, Martijn Van, D’Hont, Anouk, Konstantinov, Alexander & Furth, David, 2023, Types of Cuyabasa Bechyné, Palmaraltica Bechyné and Rhynchasphaera Bechyné (Coleoptera: Chrysomelidae: Galerucinae: Alticini: Oedionychina) of the Naturhistorisches Museum, Basel, with keys to species and descriptions of genitalia, and new combinations for species transferred to the oedionychine, Zootaxa 5318 (1), pp. 67-82 : 69

Genus Cuyabasa Bechyné, 1959

Cuyabasa Bechyné 1959:346 (type species: Wanderbiltiana minor Bechyné, 1955 , by original designation).

Number of species. Three.

Distribution. Bolivia, Brazil (states of Minas Gerais and S„o Paulo), Paraguay.

Remarks. Members of Cuyabasa share the following characteristics: body small (<5 mm), habitus rounded; frontal ridge wide, at least as wide as an antennal socket; interocular space at least as wide as twice the diameter of an eye; antennae moniliform; pronotum with narrow lateral edge, with rounded anterolateral corners of pronotum; distal portion of terminal metatarsomere strongly globose. Bechyné (1959) described the genus Cuyabasa as a possible link between Oedionychina and Disonychina LeConte & Horn, 1883, due to the presence of characters found in both subtribes. Indeed, the rather narrow lateral edge of the pronotum, rounded anterolateral pronotal corners and wide frontal ridge do correspond with genera of Disonychina like Disonycha Chevrolat, 1836 and Phenrica Bechyné, 1959 . However, the strongly globose distal portion of the terminal metatarsomere, together with the confused elytral punctation, put this genus within Oedionychina .