CLADOENDESIS OF EPHEMEROPTERA

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Callibaetis/fg2

(Panephemeroptera Euephemeroptera Euplectoptera Anteritorna pm.Tridentiseta  
Tetramerotarsata Liberevenata Turbanoculata 
Anteropatellata Baetovectata Callibaetis/fg1 - Callibaetis/fg2)

Nomen hierarchicum: Callibaetis/fg2 [f:1973; g:1881] (sine ... ; incl. Callibaetoides)

In circumscription fits:

 


References.  


Autapomorphies of Callibaetis/fg2.

(1) Tergalii have costal rib moved far from costal margin; anal rib [initially situated on anal margin see Tetramerotarsata (12)] is lost thus margins of tergalii are not bordered by ribs; all or several anteriormost tergalii with a separated anal-proximal lobe curved to ventral side. Among Tetramerotarsata, besides Callibaetis/fg2, reduction of anal rib and ventral curvation of the anal-proximal lobe takes place only in Crassabwa; in Cloeon/fg1, anal lobe is similarly curved dorsally (see Index of characters [1.3.24]). 

(2) In larva, on fore claw denticles [situated in 2 rows see Tetramerotarsata (11)] are longer than on middle and hind ones. Unique apomorphy.

(3) Viviparous. The same in Cloeon/fg2 and Oculogaster.

Characters of Callibaetis/fg2 of unclear phylogenetic status. 

Plesiomorphies of Callibaetis/fg2.

Size. Fore wing length 512 mm (see Tetramerotarsata).

Distribution. America (Nearctic and Neotropical Regions).


The taxon Callibaetis/fg2 is divided into:

1. Callibaetoides 

2. Callibaets/fg3


See also:

Baetovectata INCERTAE SEDIS

Turbanoculata INCERTAE SEDIS