(Panephemeroptera Euephemeroptera Euplectoptera Anteritorna Bidentiseta Branchitergaliae
Heptagennota Pentamerotarsata Radulapalpata
Ecdyonurus/fg1 - Ecdyonurus/fg2)

Nomen hierarchicum: Ecdyonurus/fg2 [f:1905; g:1868] (sine Afghanurus, Atopopus  

In circumscription fits:

grex spp.: Eaton 18831888: 281

subgen. Ecdyonurus: Kluge 1997: 200

gen. Ecdyonurus: Schoenemund 1930a: 45; 1930b: 83

Ecdyonurus/fg2: Kluge 2004: 176

Synonym: objective synonym of Ecdyonurus/fg [f:1905; g:1868] is Ecdyurus/g [g:1868]

References. Eaton 18831888: *; Schoenemund 1930a: * *; Kluge 1997: *; 2004: * * *.

Autapomorphy of Ecdyonurus/fg2.

(1) In larva lateral flat projections of pronotum [which are more or less developed in all Heptagennota, that is connected with body flattening see Heptagennota (1)] are large, partly fused with lateral margins of mesonotum and continued posteriorly as a pair of projections situated laterad of mesonotum (Kluge 2004: Fig.57:I). Non-unique apomorphy: various posterolateral projections of pronotum independently appeared in other mayflies.

Plesiomorphies of Ecdyonurus/fg2. Distal dentiseta is simple (Kluge 2004: Fig.58:F), or distally bifurcate [like proximal dentiseta see Ecdyonurus/fg1 (2)] (unlike Atopopus/fg1). Primary swimming setae [vestigial see Pentamerotarsata (6)] are present. Median titillators of penis are well-developed, contiguous medially (unlike Afronurus/g1).

Variable characters of Ecdyonurus/fg2. In male imago 1st segment of fore tarsus can be relatively long (longer than 1/2 of 2nd segment) or short (several times shorter than 2nd segment, like in Heptagenia/f8=g7 and some others).

Size. Fore wing length 718 mm.

Distribution. Western Palaearctic.

The taxon Ecdyonurus/fg2 is divided into:

1. Ecdyonurus/fg3

2. Helvetoraeticus/g(1)

 corsicus Esben-Petersen 1912 [Ecdyurus]

 cortensis Belfiore 1987 [Ecdyonurus]

See also:

Ecdyonurus/fg1 INCERTAE SEDIS

Radulapalpata INCERTAE SEDIS