Traverella, Edmunds, 1948

Nascimento, Stênio R. S., Lima, Lucas R. C., Mariano, Rodolfo & Azevêdo, Carlos A. S., 2020, New species and stages description of Traverella Edmunds, 1948 (Ephemeroptera Leptophlebiidae) from Northeast Brazil, Zootaxa 4861 (3), pp. 411-422 : 421

Key to nymphs of Traverella from Brazil

1. Frontoclypeal projection present ( Figs 6D , 7A )................................................... T. maranhensis

- Frontoclypeal projection absent.......................................................................... 2

2(1). Labrum width 2.5× the maximum length............................................. Traverella excelsior sp. nov.

- Labrum width 2.8× the maximum length ( Nascimento & Salles 2013: fig. 14D)............................. T. insolita

Figures

FIGURE 6. Traverella maranhensis. nymph; A) habitus; B) lateral view of head (arrow indicating the clypeal projection); C) detail of abdominal sterna; D) lateral view of nymph. Scale bars in mm: A, C and D = 2; B = 0,5.

FIGURE 7. Traverella maranhensis. nymph; A) labrum, dorsal view; B) hypopharynx, ventral view; C) labium, dorsal view; D) left mandible; E) maxilla, ventral view. Scale bars in mm: A–E = 0,5.