Insecta Mundi, Volume 10 (1996)
Revision and phylogeny of the neotropical genus Cnemida (Coleoptera: Scarabaeidae: Rutelinae)
(1996)
The scarab genus Cnemida includes eight species (including C. gigantea Jameson n. sp. from Colombia and C. tristriata Jameson n. sp. from Surinam) that inhabit tropical moist and premontane forests of South America, Central America, and Mexico. Keys to adults, diagnostic characters, descriptions, and distributions are presented. The larva of C. intermedia Bates is described and integrated into a key to larvae of the tribe Rutelini. A cladistic analysis among the species of Cnemida is based on 35 morphological characters and uses members of the genera Pelidnota and Rutela as outgroups. Four equally parsimonious cladograms are discussed.
A key and diagnoses are provided for the North American species of Scelolyperus Crotch. Descriptions are given for Scelolyperus pasadenae, new species from California and Scelolyperus tetonensis, new species from Wyoming. Luperus morriaoni Jacoby is treated as a junior synonym of Luperus varipes LeConte, Luperodes nigrovirescens Fall is treated as a junior synonym of Luperus nigrocyaneus LeConte, and Scelolyperus chautauquus Wilcox is treated as a junior synonym of Scelolyperus liriophilus Wilcox, new synonymies. Luperus lecontii Crotch is transferred to Scelolyperus, new combination. Distributional and biological data are provided for each species.
Four new species and three new genera of stygobiontic beetles are described: Dytiscidae: Siamoporus deharvengi, new genus, new species from Thailand; Sinodytes hubbardi, new genus, new species, hom China; Noteridae: Speonotenus bedosae, new genus, new species, from Indonesia; Elmidae: Neoelmis sketi, new species, from Ecuador. All of the taxa were collected from aquatic habitats in caves and bring the total known stygobiontic beetles to 23 species, 1 subspecies, and 20 genera, in 5 families. A list of the described stygobiontic beetles is included. Line drawings and/or micrographs illustrate the taxa and a map shows the type localities.
The new species Cerococcus lizeri is described; new geographical distribution for C. catenarius and new hosts for C. badius are given. A key with the 5 species from Argentina is here provided.
A new species of Diastolinus, D. burtoni is described for the islands of Grand Cayman and Cayman Brac (Cayman Islands). Local forms are characterized by displaying a conspicuous enlargement of the front tibia, character not found in any Cuban species. However, Diastolirius dentipes (endemic to Grand Cayman) was also collected in Cayo Largo del Sur, Archipelago de Los Canarreos, Cuba. Therefore this species, could no longer be considered endemic to the Cayman Islands. Whether the original dispersion occurred from Cayman Island to Cayo Largo or vice versa, is hard to prove, nevertheless, the distinctive character of the dilatation of the front tibias of Caymanian's animals strongly suggest the former variant.
Two new species of the genus Diastolinus are described for the island of Cuba, D. alfaroi and D. orientalis. After securing and comparing large series from the type localities of Diastolinus macamboensis and D. garciai, as well as from intermediate territories, we suggest, that these two taxa are indistinguishable; therefore we consider D. garciai as a junior synonym of D. macamboensis. In the private collection of the senior author are represented several new, undescribed populations.
Megapterocheilus is an endemic North American subgenus of Pterocheilus. It contains 15 described species, one of them, nevadae, new. P. nevadae occurs in desert areas of Nevada, Arizona, and New Mexico. Since the most recent key to species is 55 years old, an up-to-date key is given. Four species names are newly placed in synonymy: peninsularis R. Bohart = aritonicus R. Bohart, bimaculatus Provancher = biplagiatus Cresson, inyoensis R. Bohart = nigricaudus R. Bohart, oregonensis R. Bohart = quinquefasciatus Say.
La revisión del material tipo y de especímenes colectados recientemente del género Amphelictogon (Diplopoda: Polydesmida: Chelodesmidae), ofrece los siguientes resultados: Una combinación nueva (Rhacophorus magrtus pasa a Amphelictogoli. magnus); seis sinónimos nuevos (A. rubripes, A. sygethus, A. guantanamanus, A. flavipes sinónimos de A. cubanus; A. bidens sinónimo de A. subterraneus; A. atricolor sinónimo de A. magnus); tres status nuevos (A. bahamiensis, A. dolius, A. pinetorum pasan a subspecies de A. subterraneus) y dos taxones en status incierto (A. juvenis, A. maculatus). Se describen e ilustran por primera vez los machos de A. dentatus. Se describen cuatro especies nuevas (A . thomasi, A. hoffmani, A. alayoni, A. garridoi). Se propone agrupar los taxones en tres grupos de especies (grupo cubanus, grupo suterraneus, grupo magnus).
