Callibaetis nigrivenosus Banks 1918

Cruz, Paulo Vilela, Salles, Frederico Falcão & Hamada, Neusa, 2017, Additions and corrections to the systematics of mayfly species assigned to the genus Callibaetis Eaton 1881 (Ephemeroptera: Baetidae) from South America, Zootaxa 4231 (4), pp. 500-534 : 512-513

Callibaetis nigrivenosus Banks 1918 nomen dubium

( Figs. 8 A–8E)

Callibaetis nigrivenosa Banks 1918: 11 (name emended by McCafferty 1996) Callibaetis nigrivenosus McCafferty 1996: 231 ; Domínguez et al. 2006: 115.

Known stages. I ♀.

Comments. We studied the type specimen from photographs ( Figs. 8 A–8E). It is fragile, badly damaged and lacks the hind wings. The only reliable structure is the forewing, which allowed us to identify the specimen to the family level ( Baetidae ). The absence of hind wings in the type specimen and its description lead us to believe that these structures were always absent. The manuscript is very brief and is not illustrated. The type locality presented in the manuscript and shown on the label is not precise, referring to a broad geographical area. Even if additional specimens of this species were collected, there would be little possibility of a reliable identification using the types or the original description. Based on the lack of information in the description, the damaged type and the improbability of assigning specimens to this species, we propose Callibaetis nigrivenosus Banks as a nomen dubium.

Material examined. Callibaetis nigrivenosa , male imago (type), Ecuador, Huigar, 4,500 ft., 17 June, H. S. Parish coll., Museum of Comparative Zoology, Harvard University, MCZ-ENT 0 0 0 10057. Distribution . Ecuador: Huigar

Figures

FIGURE 8. Callibaetis nigrivenosus nomen dubium female imago (holotype). A. labels (Harvard); B. lateral view of head and thorax; C. lateral view of abdomen; D. left forewing; E. right forewing.