Silveira, Fernando A., 2009, A synopsis of Actenosigynes Moure, Graf & Urban, 1999 (Hymenoptera: Colletidae) — new species, possible oligolecty and biogeographic comments

Silveira, Fernando A., 2009, A synopsis of Actenosigynes Moure, Graf & Urban, 1999 (Hymenoptera: Colletidae) — new species, possible oligolecty and biogeographic comments, Zootaxa 2292, pp. 15-24

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