New combinations and synonymies of leafcutter and mason bees of the Americas (Megachile, Hymenoptera, Megachilidae) Author Raw, Anthony text Zootaxa 2002 71 1 43 journal article 10.5281/zenodo.155887 29fc5ef3-a547-4eb8-9753-8085aa3f215e 1175­5326 155887 Subgenus Ptilosarus Mitchell Megachile (Ptilosarus) Mitchell 1943 : 667 . Type species: Megachile bertonii Schrottky 1908 . Original designation. Michener et al 1994 : 149 . Cressoniella (Ptilosarus) Mitchell 1980 : 63 , Michener 2000 : 564 .