(Panephemeroptera Euephemeroptera Euplectoptera Anteritorna Bidentiseta Branchitergaliae
Heptagennota Pentamerotarsata Radulapalpata Heptagenia/f5=g4 
Ecdyonurus/fg1 Atopopus/fg1 - Notacanthurus)

Nomen hierarchicum: Notacanthurus/fg(1) [f:2004; g:1974]

In circumscription fits:

subgen. Notacanthurus: Kluge 1997: 202

gen. Notacanthurus Tshernova 1974: 812

Notacanthurus/g(1): Kluge 2004: 183

References. Tshernova 1974: * '; 1976: *; Kluge 2004: * * * *

Autapomorphy of Notacanthurus.

(1) Larval abdominal terga have a longitudinal median ridge; on each tergite this ridge can be stretched posteriorly in a form of a spine producing behind posterior margin of tergite (Tshernova 1972: Fig.2). This apomorphy is not unique (see Index of characters [1.3.3]), but not found in other Heptagenia/f5=g4; among Heptagennota similar dorsal spines occur in selected species of Epeorus/fg1 only.

Plesiomorphies of Notacanthurus. Unlike Afronurus/g1 and Electrogena, penis [see Pentamerotarsata (5)] has contiguous median titillators and distinct ventral and outer sclerites; in various species, ventral sclerite can be enlarged and pointed (Tshernova 1972: Fig.1), or short and blunt.

Size. Fore wing length 1014 mm.

Distribution. Middle and Eastern Asia.

Nominal species in Notacanthurus/fg(1): 

baei Braasch & Boonsoong 2009 [Notacanthurus] --

baekdu Bae 1997 [Ecdyonurus]

cristatus Braasch 1980 [Ecdyonurus]

edentatus Braasch 1986 [Notacanthurus]

islamabadicus Ali 1967 [Ecdyonurus]

ladakhensis Braasch 1986 [Notacanthurus]

zhiltzovae Tshernova 1972 [Ecdyonurus]  typus nominis Notacanthurus --/

Examined also:

sp.H2: Kluge 2004 (Tajikistan) --/

sp.H3: Kluge 2004 (Kyrgyzstan) --/

See also:

Ecdyonurus/fg1 INCERTAE SEDIS

Radulapalpata INCERTAE SEDIS