CLADOENDESIS OF EPHEMEROPTERA
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Macdunnoa

(Panephemeroptera Euephemeroptera Euplectoptera Anteritorna Bidentiseta Branchitergaliae
Heptagennota Pentamerotarsata Radulapalpata 
Heptagenia/f5=g4Ecdyonurus/fg1Heptagenia/f6=g5KageroniaHeptagenia/f7=g6 
Stenonema/fg1 - Macdunnoa)

Nomen hierarchicum: Macdunnoa/g(1) [g:1979]

In circumscription fits:

— subgen. Macdunnoa: Kluge 1983b: 16 (Abstract)

— gen. Macdunnoa Lehmkuhl 1979b: 860

— Macdunnoa/g(1): Kluge 2004: 175

References. Lehmkuhl 1979b: ; – Flowers 1982: .

Autapomorphy of Macdunnoa.

(1) Tergalius VII [see Stenonema/fg1 (3)] has a form of very small vestige (at least in persimplex [Heptagenia] and brunnea [Macdunnoa]; in original description of nipawinia [M.] is said that tergalii VII are lost). Tergalius VI is strongly diminished.

Character of Macdunnoa of unclear phylogenetic status. 

(2) Tergalii I–VI with rounded apex. The same in Stenonema/fg3.

Size. Fore wing length 6–9 mm. 

Distribution. Nearctic.

Nominal species in Macdunnoa/g(1): 

brunnea Flowers 1982 [Macdunnoa]

nipawinia Lehmkuhl 1979 [Macdunnoa]

persimplex McDunnough 1929 [Heptagenia]

See also:

Radulapalpata INCERTAE SEDIS

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