(Panephemeroptera Euephemeroptera Euplectoptera Anteritorna Bidentiseta Furcatergaliae  
Tricorythus/fg1Ephemerella/fg2 - Ephemerella/fg3)

Nomen hierarchicum: Ephemerella/fg3 [f:1909; g:1862] (sine Timpanoga; incl. Torleya)

In circumscription fits:

 Ephemerellinae: McCafferty & Wang 2000: 39

 Ephemerella/fg3: Kluge 2004: 303 [Internet publication 1998]

References. McCafferty & Wang 2000: * *; Kluge 2004: * * * *

Autapomorphy of Ephemerella/fg3.

(1) Tergalii I [initially stick-like see Ephemerella/fg1 (13)] are lost (non-unique apomorphy see Index of characters [1.3.33]); thus only tergalii III-VII are present [see Ephemerella/fg2 (1)] (Kluge 2004: Fig.91:A).

Plesiomorphies of Ephemerella/fg3. Unlike Timpanoga/fg1, tergalii III are retained, having structure typical for Ephemerella/fg1 [see Ephemerella/fg1 (7)]; usually tergalii III have approximately the same size as tergalii IV-VI (Kluge 2004: Fig.91:A), but sometimes tergalii III are enlarged, transformed to gill opercula and cover the others (see Table).

Size. Fore wing length 519 mm.

Distribution. Holarctic and Oriental Region.

The taxon Ephemerella/fg3 is divided into:

1. Ephemerella/fg4

1.1. plesiomorphon Ephemerella/fg5

1.2. Drunella

1.3. Caudatella

1.4. Cincticostella/g1

1.4.1. plesiomorphon Notacanthella

1.4.2. Cincticostella/g2 plesiomorphon Ephacerella Cincticostella/g3 plesiomorphon Cincticostella/g4 Rhionella

2. Hyrtanella/f1=Torleya/g1 

2.1. plesiomorphon Torleya/g2

2.2. Teloganopsis

2.3. Hyrtanella/f2=Crinitella/g1

2.4. Uracanthella

2.5. Amurella

Some insufficiently described species have uncertain systematic position