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Amarante, S.T.P. 2005. On the systematics of Trypoxylon scrobiferum Richards and T. anapaike Amarante with the recognition of a new species group in the subgenus Trypoxylon (Hymenoptera: Crabronidae: Trypoxylini) . Papéis Avulsos de Zoologia. 45, 9 (Jan. 2005), 91–101. DOI:https://doi.org/10.1590/S0031-10492005000900001.