CLADOENDESIS OF EPHEMEROPTERA

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Offadens

(Panephemeroptera Euephemeroptera Euplectoptera Anteritorna pm.Tridentiseta  
Tetramerotarsata Liberevenata Turbanoculata
 Anteropatellata Baetovectata Baetungulata - Offadens)

Nomen hierarchicum: Offadens/g [g:1998] 

In circumscription fits:

 gen. 


References.  


Autapomorphies of Offadens/g1.

...

Characters of Offadens/g1 of unclear phylogenetic status. 

??() Larval antennae bases are not turned together, frons between them does not form a keel (unlike Nigrobaetis/g1, Fallceon et al. see Index of characters [1.1.3]).

??() Hind wing [see Turbanoculata (10)] of the "Nigrobaetis-type": not narrowed, with non-curved pointed costal projection, with three longitudinal veins among which the second is bifurcate (i.e. MA arises from RA). The same in Nigrobaetis/fg1 and some others (see Index of characters [2.2.60]).

Plesiomorphies of Offadens/g1.

In mature larva ready to moult to subimago, buds of subimaginal gonostyli are folded under larval cuticle by the "Nigrobaetis-type": 2nd segment of gonostylus is directed posteriorly and diped into 1st segment [see Baetovectata (3)] (unlike Baetofemorata and Labiobaetis/f1 see Index of characters [2.3.9]). 

Larval paracercus is developed.

Size. Fore wing length ?? mm (see Tetramerotarsata).

Distribution. Australia.


Nominal species in Offadens/g1:

 

 

soror Ulmer 1908 [Baetis] --/  


Examined also:

 


See also:

Baetovectata INCERTAE SEDIS

Turbanoculata INCERTAE SEDIS