(Panephemeroptera Euephemeroptera Euplectoptera Anteritorna Bidentiseta Furcatergaliae  
Tricorythus/fg1Ephemerella/fg2 Timpanoga/fg1 - Attenella)

Nomen hierarchicum: Attenella/fg(1) [f:2000; g:1971]

In circumscription fits:

subgen. Attenuatella Edmunds 1959: 546

gen. Attenella: Allen 1980: 84

tribus Attenellini McCafferty 2000: 158

Attenella/fg(1): Kluge 2004: 301

Synonym: objective synonym of Attenella/fg is Attenuatella/g [g:1959] nom. praeocc.

References. Edmunds 1959: ; Allen & Edmunds 1961: ; Edmunds & Jensen & Berner 1976: * *; McCafferty & Wang 1994a (gen.): * *; Kluge 2004: * *

Autapomorphy of Attenella.

(1) In imago distal segment of gonostylus [see Ephemerella/fg1 (8)] is strongly elongate, its length 56 times exceeds width.

Plesiomorphies of Attenella. Unlike Timpanoga/fg2, larva has no tendency to development of gill opercula: tergalius IV is not larger or only slightly larger than next one; abdominal segments bearing tergalii are not shortened and not widened if compare with other segments.

Size. Fore wing length 6 mm. 

Distribution. Nearctic.

Nominal species in Attenella/fg(1):

attenuata McDunnough 1925 [Ephemerella] typus nominis Attenella

delantala Mayo 1952 [Ephemerella]

 hirsuta Berner 1946 [Ephemerella] syn.subj. attenuata [Ephemerella]

margarita Needham 1927 [Ephemerella (Ephemerella)]

soquele Day 1954 [Ephemerella]

See also: