Cunha, A. M. and Lamas, C. J. E. (2005) “Two new species of Heterostylum Macquart (Diptera, Bombyliidae, Bombyliinae) from Brazil”, Zootaxa. Auckland, New Zealand, 1006(1), pp. 23–32. doi: 10.11646/zootaxa.1006.1.3.