Gnathanthidium, gen.n. is proposed for two new species from South America, one from Brazil (Paraná, Santa Catarina and Rio Grande do Sul) and Argentina (Misiones) Gnathanthidium sakagamii, sp.n. and another from Argentina (Tucuman) Gnathanthidium ferrugineum, sp.n. The female of this Anthidiine bee nas peculiar mandibles without large teeth, only with two little ones on the apical margin.
Gnathanthidium; gen.n.; Anthidiinae; Megachilidae; taxonomy