CLADOENDESIS OF EPHEMEROPTERA
Leptophlebia/fg1 Atalophleboadentata Atalophlebopectinata Atalophleboculata Atalophlebomaxillata Atalophlebolinguata
... Choroterpes/fg1 - Choroterpes/fg2)
Nomen hierarchicum: Choroterpes/fg2 [f:2012; g:1881] (sine Thraulus; incl. Euthraulus)
In circumscription fits:
Choroterpes/fg2 = tribus Choroterpini s.str. = gen. Choroterpes s.l.: Kluge 2012
References. Kang & Yang 1994b: *; Kluge 2012: * * *.
Characters of Choroterpes/fg2 of unclear phylogenetic status.
(1) Egg surface with a peculiar relief: there are papillae and ridges; ridges stretch from one papilla to another and form broken lines in such a manner that each papilla is surrounded by a regular crown of several (68) acute angles formed by these ridges; usually each such crown is elevated in a form of aster-like or flower-like protuberance (Kluge 2012: Fig.17, 2023, 7075, 94, 96-97). This relief is absent in pacis [Choroterpes] and assimilis [Choroterpes (Euthraulus)] [Gattoliat & Sartori 2008]. In mercatorius [Choroterpes] this relief is modified (Kluge 2012: Fig.56). The same in Megaglena.
(2) Each tergalius IIVII has both lamellae [see Leptophlebia/fg1 (10)] wide, 3-pointed, i.e. with two processes by sides of terminal process (Kluge 2012: Fig.67, 7782, 140141). Non-unque apomorphy (see Index of characters [1.3.23]). In selected species some lamellae have less than three apices (Kluge 2012: Fig.712, 3136, 5863, 104, 138). In Monochoroterpes tergalii IIVII are unilamellate [see below, Monochoroterpes (1)]. Tergalius I has different structure, often thread-like [see Choroterpes/fg1 (1)].
(3) Each penis lobe has an apical projection dorsad of gonopore; this projection stretches in distal direction and bears fine colorless denticles. Size of this apical projection varies from very small (e.g., in petersi [Choroterpes]) to very long (Kluge 2012: Fig.6869, 117); its shape varies from rounded (Kluge 2012: Fig.38, 53, 89) to pointed (Kluge 2012: Fig.19, 68). The same in Sangpradubina.
(4) Number of intercalaries between CuA and CuP [which is initially 2 see Leptophlebia/fg1 (7)] is increased to 36 (usually 5). The same in Sangpradubina.
Size. Fore wing length ?? mm.
Distribution. Mainly Arctogea (Afrotropical, Oriental, Palaearctic and Nearctic Regions) with a few species in the north of Neotropical Region.
|The taxon Choroterpes/fg2 is divided into:|
1.1 Plesiomorphon Choroterpes/fg4
2.1 Plesiomorphon Euthraulus/g2
Some species are known as adults only and have uncertain systematic position