Callibaetis gregarius Navas 1930

Callibaetis gregarius Navás 1930 nomen dubium

(Figs. 3 A–3G)

Callibaetis gregarius Navás 1930a: 72; Gillies 1990: 24; Domínguez et al. 2006: 113; Cruz et al. 2014: 29.

Known stages. I ♂

Comments. The specimen studied at the Museu de Zoología de Barcelona (Figs. 3 A and 3B) is not a male imago, as indicated by Gillies (1990), but rather a male subimago in very poor condition. Other specimens are available in the Senckenberg Deutsches Entomologisches Institut Müncheberg (Figs. 3 C–3G), but they are also male subimagoes in poor condition. Even if additional specimens of this species could be obtained, the inadequate description, the very poor condition of the type and the vagueness of the type locality would probably minimize the possibility of a reliable identification. Based on our re-evaluation of the morphological and other evidence, we propose that Callibaetis gregarius be classified as a nomen dubium.

Material examined. Callibaetis gregarius, male subimago (labeled as type) and one male subimago, BRAZIL, Ypiranga, 19.iv.1910, MZB; three male subimagoes (labeled as syntypes) same data, Senckenberg.

Distribution. Brazil: São Paulo.