Ptilosarus Mitchell Mitchell 1943 : 667 Megachile bertonii Schrottky 1908 Michener et al 1994 : 149 Mitchell 1980 : 63 Michener 2000 : 564 New combinations and synonymies of leafcutter and mason bees of the Americas (Megachile, Hymenoptera, Megachilidae) Raw, Anthony Zootaxa 2002 71 1 43 [741,974,521,547] Insecta Megachilidae Megachile Animalia Hymenoptera 31 32 Arthropoda subGenus Ptilosarus    Subgenus  PtilosarusMitchell     Megachile (Ptilosarus)  Mitchell 1943: 667. Typespecies:  Megachile bertonii Schrottky 1908. Original designation.  Michener et al 1994: 149.    Cressoniella (Ptilosarus)  Mitchell 1980: 63,  Michener 2000: 564.     Megachile (Ptilosarus)  Mitchell 1943: 667. Typespecies:  Megachile bertonii Schrottky 1908. Original designation.  Michener et al 1994: 149.    Cressoniella (Ptilosarus)  Mitchell 1980: 63,  Michener 2000: 564.