New records and diagnostic notes on large carpenter bees (Hymenoptera: Apidae: genus Xylocopa Latreille), from the Amazon River basin of South America Author Mawdsley, Jonathan R. text Insecta Mundi 2018 2018-05-25 631 1 15 journal article 10.5281/zenodo.3699701 e23922d1-6f43-4280-8ac6-131767dc4464 1942-1354 3699701 8EB081BE-6413-4CE7-861C-97B4746E075A Key to females of Amazon Basin subgenera of Xylocopa (Modified from Michener 2007 ) 1. Lower tooth of mandible narrower than upper tooth, as measured across the mandible at the apex of the notch between upper and lower tooth....................................................................... Xylocopa (Stenoxylocopa) – One species: X . ( Stenoxylocopa ) ruficollis Hurd and Moure, 1963 — Lower tooth of mandible equal to or much wider than upper tooth..................... 2 2(1). Ventral segments of metasoma with a conspicuous, well-defined median longitudinal ridge; ridges of consecutive segments forming a distinct ventral “keel” along midline of metasoma................................. Xylocopa (Neoxylocopa) – 13 species: see key below — Ventral segments of metasoma more gently rounded, with at most an indistinct, feeble median longitudinal ridge or with ridge absent...................................................................... Xylocopa (Schonnherria) – 10 species: see key below