(Panephemeroptera Euephemeroptera Euplectoptera Posteritorna  
Baetisca/f2=g1 Baetisca/f3=g2 - Fascioculus)

Nomen hierarchicum: Fascioculus/g(1) [g:1981]

In circumscription fits:

subgen. Fascioculus: Pescador & Berner 1981: 168

Fascioculus/g(1): Kluge 2004: 69

References. Pescador & Berner 1981: ; Kluge 2004: .

Autapomorphy of Fascioculus.

(1) Larval, subimaginal and imaginal eyes with vertical alternate light and dark bands (Pescador & Berner 1981: Fig.12b)

Character of Fascioculus of unclear phylogenetic status. 

(2) Larval notal shield [see Baetisca/f3=g2 (4)] is compressed dorsoventrally (unlike Baetisca/f4=g3). Plesiomorphy of Fascioculus. Unlike Baetisca/f4=g3, larval head has no frontal projections between antennae bases; there are only genal projections latero-ventrad of antennae bases, which are more or less developed in all Baetisca/f3=g2 (Pescador & Berner 1981: Fig.12b).

Size. Fore wing length 812 mm.

Distribution. Florida (USA).

Nominal species in Fascioculus/g(1): 1 species

escambiensis Berner 1955 [Baetisca typus nominis Fascioculus