CLADOENDESIS OF EPHEMEROPTERA

ABC

z 

Belovius/g2

(Panephemeroptera Euephemeroptera Euplectoptera Anteritorna Bidentiseta Branchitergaliae
Heptagennota Pentamerotarsata Radulapalpata  Rhithrogena/fg1  
Epeorus/fg1
BleptusEpeorus/fg2IronodesEpeorus/fg3 Belovius/g1 - Belovius/g2)

Nomen hierarchicum: Belovius/g2 [g:1981] (sine Albertiron

In circumscription fits:

— subgen. Belovius: Sinitshenkova 1981: 813

— Belovius/g2: Kluge 2004: 205


References. Sinitshenkova 1981: *; – Kluge 1997d: *; – 2004: * * *.


Autapomorphies of Belovius/g2.

(1) Tergalii of middle pairs are large, with wide rounded anal-proximal projection; on tergalii II–VI anal rib [situated at a distance from anal margin – see Belovius/g1 (1)], is arched, directed by its apex toward anal margin and supports the anal-proximal projection of tergalius (Kluge 2004: Fig.65:E) (unique apomorphy). On tergalius VII anal rib is also situated at a distance from anal margin, but is nearly straight. On tergalius I this rib is lost, as well as in many other Epeorus/fg3.

(2) Patella-tibial suture [initially lost in larva but retained on middle and hind legs of adult – see Epeorus/fg1 (8)] is restored on larval middle and hind legs. This condition coincides with plesiomorphic for other mayflies (see Index of characters [1.2.18]).

Size. Fore wing length 10–15 mm.

Distribution. Eastern Palaearctic and Oriental Region.


Nominal species in Belovius/g2:

 carinatus Braasch & Soldán 1984 [Epeorus]

 daedaleus Sinitshenkova 1981 [Epeorus (Belovius)] — syn.subj. ermolenkoi [Epeorus (Belovius)]

 ermolenkoi Tshernova 1981 [Epeorus (Belovius)] ,,

 frolenkoi Sinitshenkova 1981 [Epeorus (Belovius)]

 gornostajevi Tshernova 1981 [Epeorus (Belovius)] --/

 latifolium Ueno 1928 [Epeorus]

 ninae Kluge 1995 [Epeorus (Belovius)] — syn.obj. sinitshenkovae [Epeorus (Belovius)]

 pellucida Brodsky 1930 [Cinygma] --/

 rubeus Tiunova 1991 [Epeorus (Belovius)] --

 sinitshenkovae Tshernova 1981 [Epeorus (Belovius)]

 smirnovi Tshernova 1978 [Cinygmula] — syn.subj. pellucida [Cinygma]

 tshernovae Braasch 1979 [Epeorus] — syn.subj. pellucida [Cinygma]


See also:

Epeorus/fg3 INCERTAE SEDIS

Radulapalpata INCERTAE SEDIS

__