Palaearctic Hoplitis bees of the subgenera Chlidoplitis and Megahoplitis (Megachilidae, Osmiini): biology, taxonomy and key to species Author Müller, Andreas text Zootaxa 2014 2014-02-17 3765 2 161 174 journal article http://dx.doi.org/10.11646/zootaxa.3765.2.4 70f988df-b3bb-4994-a6a4-ab51934194d5 1175-5326 230853 02477E80-6B9A-44DB-83C2-80AE06A925A1 taenioceras species group Apart from the characters typical for both the taenioceras and heinrichi species groups (see above), the four species of the taenioceras group are characterized by the lack of a buttonlike projection on the last segment of the male antenna ( Fig. 5 ).