Behningiidae (Nymph)

Zhou, Xiongdong, Bisset, Mike, Xu, Mengzhen & Wang, Zhaoyin, 2019, A new species of Behningia Lestage, 1929 (Ephemerotera: Behningiidae) from China, Zootaxa 4671 (3), pp. 420-426 : 425

Key to the seven extant species of Behningiidae (Nymph) , excluding B. tshernovae

1 Tarsi of the prothoracic legs fused to tibiae; tibiae of the metathoracic legs not reduced................. Protobehningia , 2

- Tarsi of the prothoracic legs not fused to tibiae; tibiae of the metathoracic legs reduced.............................. 3

2 Glossae and paraglossae with less than 5 long stout setae on the ventral surface......... Protobehningia asiatica Tshernova

- Glossae and paraglossae with more than 20 long stout setae on the ventral surface.... Protobehningia merga Peters & Gillies

3 Forewing pads without gemination of veins; glossae of labium not fused; paraglossae of labium much wider than long........................................................................... Dolania americana Edmunds & Traver

- Forewing pad with gemination of veins; glossae of labium fused; paraglossae of labium no wider than long..... Behningia , 4

4 Medio-anterior emargination of labrum very shallow; paraglossae of labium as long as wide; coxa of metathoracic leg as long as femur................................................................... Behningia nujiangensis , sp. nov.

- Medio-anterior emargination of labrum deep, with U- or V-shape; paraglossae of labium much longer than wide; coxa of metathoracic leg less than 60% as long as femur................................................................. 5

5 Labial palp II more than 2/3 as long as labial palp III..................................... Behningia ulmeri Lestage

- Labial palp II less than 1/2 as long as labial palp III.......................................................... 6

6 Labial palp I with straight margins from base, without marginal concavities......... Behningia baei McCafferty & Jacobus

- Labial palp I with distinct concavities along the margins......................... Behningia lestagei Motas & Bǎcesco