CLADOENDESIS OF EPHEMEROPTERA

ABC

z 

PAGE UNDER CONSTRUCTION

Acerpenna

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

Nomen hierarchicum: Acerpenna/g(1) [g:1987]

In circumscription fits:

 subgen. Acerpenna: Novikova & Kluge 1994: 624

 gen. Acerpenna Waltz & McCafferty 1987d: 669


References.  


Autapomorphies of Acerpenna.

(1) Tergalius VII is crescent-shaped: anal rib [situated on anal margin see Tetramerotarsata (12)] is shortened, and anal margin of tergalius goes nearly straight from apex of the vestige of anal rib to apex of costal rib, thus forming a point. The same in some Nigrobaetis/g3 digitatus [Baetis] and acinaciger [B.].

Characters of Acerpenna of unclear phylogenetic status. 

() In mature larva ready to moult to subimago, buds of subimaginal gonostyli are folded under larval cuticle by the "Labiobaetis-type" [see Baetofemorata (2)]: 2nd and 3rd segments of gonostylus are directed medially and somewhat arched by convexity posteriorly, thus margin of 2nd segment represents the posteriormost part of the bud (Fig. ??). The same in some other taxa (see Index of characters [2.3.9]).

() On anterior margin of hind wing [see Turbanoculata (10)] distally from costal projection is present a gentle convexity covered with small spines. The same in Camelobaetidius/g1?

Plesiomorphies of Acerpenna.

...

Size. Fore wing length 25 mm (see Tetramerotarsata).

Distribution. Nearctic.


Nominal species in Acerpenna/g(1):

harti McDunnough 1924 [Baetis]  syn.subj. pygmaea [Cloe]

herodes Burks 1953 [Baetis]  syn.subj. macdunnoughi [Baetis

macdunnoughi Ide 1937 [Baetis]   typus nominis Acerpenna  

pygmaea Hagen 1861 [Cloe]  ,/

spiethi Berner 1940 [Baetis]  syn.subj. pygmaea [Cloe]


See also:

Baetovectata INCERTAE SEDIS

Turbanoculata INCERTAE SEDIS