Plesiomorphon Pentagenia

(Panephemeroptera Euephemeroptera Euplectoptera Anteritorna Bidentiseta Furcatergaliae  
Fimbriatotergaliae Fossoriae Cryptoprosternata Palingenia/f2=g1 - pm.Pentagenia)

Nomen hierarchicum: Pentagenia/fg(1) [f:1972; g:1863]

In circumscription fits:

gen. Pentagenia Walsh 1863: 196

 subfam. Pentageniinae: McCafferty & Edmunds 1976a: 489

fam. Pentageniidae McCafferty 1972: 51

plesiomorphon Pentagenia/fg(1): Kluge 2004: 252

References. Eaton 18831888: ; Needham & Traver & Hsu 1935: ; Burks 1953: ; McCafferty 1972; 1975: ; McCafferty & Edmunds 1976a: ; Edmunds & Jensen & Berner 1976: ; Keltner & McCafferty 1986: ; Kluge 2004:

Plesiomorphies of Pentagenia. On outer margin of mandibular tusk each denticle terminates by a spine-like seta [see Palingenia/f2=g1 (2)]. Larval outer margin of fore tibia without denticles, with spine-like setae [see Palingenia/f2=g1 (5)] (Kluge 2004: Fig.74:DE). Vestige of tergalius I [see Cryptoprosternata (6)] is bilamellate (unlike Anagenesia/g1). 

Unlike Palingenia/f3=g2, egg is not lens-like, its form is irregular with convexity.

Unlike other Cryptoprosternata, imago and subimago are not short-living: mesonotal suture is moderately stretched posteriorly, and subimaginal mesonotum has pigmented areas of characteristic shape [see Fimbriatotergaliae (2)] (Kluge 2004: Fig.74:A); imaginal and subimaginal legs are normally developed, claws are ephemeropteroid [except for male fore legs see Palingenia/f2=g1 (7)]; wing structure is similar to that of Ephemera/fg9, without vein gemination; in cubital field of fore wing several (36) branched or simple veins go from CuA to basitornal margin [see Anteritorna (1)] (unlike Palingenia/f3=g2). Gonostylus is 4-segmented: with distinct long 1st segment and 2 distal segments (unlike some Palingenia/f3=g2, which have increased segment number). In female imago and subimago paracercus is subequal to cerci [while in male paracercus is vestigial see Cryptoprosternata (5)].

Size. Fore wing length 1419 mm. 

Distribution. Nearctic.

Nominal species in Pentagenia/fg(1): 1 species

quadripunctata Walsh 1863 [Pentagenia] syn.subj. vittigera [Palingenia]

robusta McDunnough 1926 [Pentagenia] syn.subj. vittigera [Palingenia]

vittigera Walsh 1862 [Palingenia] ,/,/