CLADOENDESIS OF EPHEMEROPTERA
Heptagennota Pentamerotarsata Radulapalpata Heptagenia/f5=g4
Ecdyonurus/fg1 - Ecdyonurus/fg2)
Nomen hierarchicum: Ecdyonurus/fg2 [f:1905; g:1868] (sine Afghanurus, Atopopus)
In circumscription fits:
— grex spp.: Eaton 1883–1888: 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 1883–1888: *; – 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 7–18 mm.
Distribution. Western Palaearctic.
|The taxon Ecdyonurus/fg2 is divided into:|
corsicus Esben-Petersen 1912 [Ecdyurus]
cortensis Belfiore 1987 [Ecdyonurus]
Ecdyonurus/fg1 INCERTAE SEDIS
Radulapalpata INCERTAE SEDIS