tonsum, Taxa Only, Exact Match: 2 Treatments

Chelostoma (Gyrodromella) tonsum		sp. nov.	Müller, Andreas, 2015, Palaearctic Chelostoma bees of the subgenus Gyrodromella (Megachilidae, Osmiini): biology, taxonomy and key to species, Zootaxa 3936 (3), pp. 408-420 : 414-415	414-415
Aspidodiadema tonsum		new species	Agassiz, A., 1879, Preliminary report on the Echini of the exploring expedition of H. M. S. " Challenger, " Sir C. Wyville Thomson chief of civilian staff, Proceedings of the American Academy of Arts and Sciences 14, pp. 190-212 : 199	199