New combinations and synonymies of leafcutter and mason bees of the Americas (Megachile, Hymenoptera, Megachilidae) Author Raw, Anthony text Zootaxa 2002 2002-09-26 71 1 1 43 https://doi.org/10.11646/zootaxa.71.1.1 journal article 10.11646/zootaxa.71.1.1 29fc5ef3-a547-4eb8-9753-8085aa3f215e 1175­5326 155887 69FA01B5-8619-464F-8107-2FF4B932239C Subgenus Acentron Mitchell Megachile ( Acentron ) Mitchell 1934 : 307 . Type species: Megachile albitarsis Cresson 1872 . Original designation. Michener et al 1994 : 149, Michener 2000 : 549. Pseudocentron ( Acentron ) Mitchell 1980 : 56.