CLADOENDESIS OF EPHEMEROPTERA
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Afrotricorythi, or Tricorythus/fg3

(Panephemeroptera Euephemeroptera Euplectoptera Anteritorna Bidentiseta Furcatergaliae  
Ephemerella/fg1 Pantricorythi Tricoryptera - Afrotricorythi)

Nomen hierarchicum: Tricorythus/fg3 [f:1942; g:1868] (sine Leptohyphes; incl. Ephemerythus, Dicercomyzon, Machadorythus)

Nomen circumscribens:  Afrotricorythi Kluge 2004: 327

In circumscription fits:

— Afrotricorythi, or Tricorythus/fg3: Kluge 2004: 327

References. Kluge 2004: * * * *

Autapomorphies of Afrotricorythi.

(1) The 1st cubital fork [a single vein in cubital field of fore wing – see Tricoryptera (1)] arises from CuP forming with it a symmetrical wide Y-shape figure; 1st cubital fork can retain own bifurcation, or its posterior branch (x2) is transformed to intercalary, thus x1, x2 and CuP look as a triad (Kluge 2004: Fig.99:A; Kluge 2010: Fig.1, Kluge 2010: Fig.25-26).

(2) Gonostylus lacks distal segment [see Ephemerella/fg1 (8) and Pantricorythi (2)] (Kluge 2004: Fig.98:C, Kluge 1010: Fig.25-27, Kluge 2010: Fig.17, Fig.44-45, Fig.68, Fig.81). Non-unique apomorphy (see Index of characters [2.3.12]); among Pantricorythi the same in some Leptohyphes/fg1.

Size. Fore wing length 4–10 mm (see Tricoryptera).

Distribution. Tropical areas of Old World: Afrotropical and Oriental Regions.

The taxon Afrotricorythi (or Tricorythus/fg3) is divided into:

1. Tricorygnatha (or Tricorythus/fg4)

2. Ephemerythus 

3. Dicercomyzon 

4. Machadorythus
Some species known as adults only have uncertain systematic position

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