CLADOENDESIS OF EPHEMEROPTERA
Eusetisura Discoglossata Geminovenata - Homoeoneuria/g1)
Nomen hierarchicum: Homoeoneuria/g1 [g:1881] (incl. Oligoneurisca)
In circumscription fits:
Homoeoneuria/g1: Kluge 2004: 142.
Reference. Kluge 2004: * * * *.
Autapomorphies of Homoeoneuria/g1.
(2) Larval middle and hind legs are highly specialized, with coxae and claws modified (Tshernova 1937: Fig.6; Pescador & Peters 1980: Fig.56). Coxa is very strongly elongate at all its sides, having a form of mobile cylindrical segment narrowly attached to the body. Claws are nearly straight, slender and desclerotized, without median row of denticles on inner side [see Eusetisura (5)], either smooth (in Homoeoneuria/g2) or with two rows of protuberances by sides (in Oligoneurisca Kluge 2004: Fig.43:F). Most part of the leg is covered by dense long thin setae; unlike other Eusetisura, without stout setae. In winged stages coxae of middle and hind legs are also very strongly elongated and attached to the body by narrow base.
(3) Larval abdominal sterna II and III each with a median protuberance, which on its sides bears long setae directed laterally; next abdominal sterna also with long setae directed laterally-posteriorly. Unique apomorphy.
(4) In male imago tarsus of middle and hind leg [non-functional see Geminovenata (2)] either looks as 2-segmented, or its segmentation is indistinct.
Characters of Homoeoneuria/g1 of unclear phylogenetic status.
(5) Larval head is secondarily hypognathous, head shield is not large, without regular row of marginal setae [see Discoglossata (1)]: in Homoeoneuria/g2 with submarginal setae only, in Oligoneurisca without setae (Tshernova 1937: Fig.2; Pescador & Peters 1980: Fig.56).
(6) Tergalii IIVII are not cup-shaped [see Discoglossata (10)], flat, with dense row of long pectinate setae on anal margin (Tshernova 1937: Fig.9). The same in Fittkauneuria; possibly synapomorphy.
Plesiomorphies of Homoeoneuria/g1. On fore wing bifurcation of MA is situated near wing base (unlike Elassoneuria/g1). Larval and imaginal paracercus is well-developed (unlike Lachlania, Spaniophlebia and some Oligoneuriella/g2).
Size. Fore wing length 712 mm.
Distribution. Surely known from south of Nearctic, north of Neotropical and west of Palaearctic Regions; one poorly known species in Madagascar.
|The taxon Homoeoneuria/g1 is divided into:|
Poorly known African species with uncertain systematic position