CLADOENDESIS OF EPHEMEROPTERA
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Leptophlebia/fg1 Atalophleboadentata Atalophlebopectinata Atalophleboculata Atalophlebomaxillata Atalophlebolinguata
Nomen hierarchicum: Deleatidium/g1 [g:1899] (incl. Penniketellus, Lepeorus, Lepegenia)
In circumscription fits:
Autapomorphies of Deleatidium/g1.
(?) Tergalii form a sucking disk similar to that of Rhithrogena/fg3 and Iron/g1 in Radulapalpata: each tergalius IVII consists of a single wide lamella [instead of two see Leptophlebia/fg1 (10)]; costal margin of tergalius I is strongly produced anteriorly and turned under thorax...? Tergalii either have no ribs other than main trachea (e.g. in fumosum [D.]), or have a secondary rib close to the main trachea; this can be a short swelling at base of tergalia (??i.g. in myzobranchia [D.]), or a long arched rib on ventral and ?dorsal side (e.g. in lineata [Lepegenia]).
Characters of Deleatidium/g1 of unclear phylogenetic status.
?) Labrum is widened, with anterior margin rolled ventrally and covered with dense setae (the same in ...?); median incision [see Atalophleboculata (2)] is either deep and narrow with denticles vestigial (in most of New Zealand species) or without denticles, or lost (e.g. in cornutum [D.], lineata [Lepegenia]); submarginal row of setae can be retained (e.g. in fumosum [D.]) or lost (e.g. in myzobranchia [D.], lineata [Lepegenia]).
(?) Larval abdominal terga with a median stripe of irregular long slender setae (the same in ...?)
Plesiomorphies of Deleatidium/g1.
Variable characters of Deleatidium/g1
All imaginal and subimaginal claws are either ephemeropteroid, or intermediate between ephemeropteroid and pointed, or pointed without "opposing hook" (Towns & Peters 1996: Fig.1620) (see Index of characters [2.2.85]).
Size. Fore wing length 519 mm.
Distribution. New Zealand and New Caledonia.
|The taxon Deleatidium/g1 is divided into:|