Taxonomic revision and cladistic analysis of Homoschema Blake (Coleoptera : Chrysomelidae : Alticinae)

The West Indian genus Homoschema Blake is revised and redescribed. Seven ne w species are described: H, biscutatum (Hispaniola), H. blakeae (Jamaica), a furthi (Dominican Republic), H, lineatum (Dominica), H. lingulatum (Domin ican Republic), H. pseudobuscki (Jamaica), and H. sasha (Cuba). Twenty spec ies are redescribed: H. androsense Blake (Bahama Islands), H. azureipenne B echyne (Guadeloupe), H. buscki Blake (Hispaniola), H. dominicae Blake (Domi nica), H, felis Blake (Bahama Islands), H. fraternum Blake (Puerto Rico), H , hoffmani Blake (Hispaniola), H, jamaicense Blake (Jamaica), H. latitarsum Blake (Puerto Rico), H. latum Blake (Cuba), H. leucurum Blake (Hispaniola) , H. longense Blake (Bahama Islands), H. manni Blake (Cuba), H. nigriventre Blake (Puerto Rico), H. obesum Blake (Puerto Rico), H. opimum Blake (Hispa niola), a orientense Blake (Cuba), H, ornatum Blake (Cuba), H. pingue Blake (St. Croix, V.I.), and H. xanthocyaneum Blake (Jamaica). A key to the spec ies is provided. A cladistic analysis based on 16 morphological characters of adults from 29 taxa supports the monophyly of Homoschema. Cladograms ind icate several evolutionary patterns involving the head capsule, pronotum, a nd the genitalia of both sexes. Phylogenetic relationships among some Homos chema species are unresolved in all equally parsimonious trees.