Tasmanophlebia

CLADOENDESIS OF EPHEMEROPTERA
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Tasmanophlebia/g1

(Panephemeroptera Euephemeroptera Euplectoptera Anteritorna pm.Tridentiseta
Vetulata - Tasmanophlebia/g1)

Nomen hierarchicum: Tasmanophlebia/g1 [g:1921] (incl. Siphlonella)

In circumscription fits:

— Tasmanophlebia/g1: Kluge 2004: 111

Nominal taxa included:

Tasmanophlebiodes [1935] – unavailable name

Siphlonella/g [g:1924]

References. Tillyard 1921 (Tasmanophlebia): '; – Needham & Murphy 1924 (Siphlonella): '; – Tillyard 1933 (Tasmanophlebia): ' '; – 1936a (Tasmanophlebia): ' '; – Ulmer 1938 (Siphlonella): '; – Traver 1944 (Siphlonella): ' '; – Riek 1955 (Tasmanophlebia): ' '; – Edmunds 1975 (Tasmanophlebia, Siphlonella): ; – Kluge 2004: * * *.

Autapomorphies of Tasmanophlebia/g1.

(1) On hind wing bifurcation of MP [the third triad – see Euplectoptera (1)] is nearer to wing margin than to wing base, more distal than bifurcations of RS and MA (photo ). Non-unique apomorphy (see Index of characters [2.2.69]).

(2) Tergalii V–VII are lost, and other tergalii have true operculate structure [see Vetulata (1)] (Kluge 2004: Fig.33:A): tergalii I are much larger than others and completely cover them (photos ); bases of tergalii II–IV are shifted anteriorly; lateral margins of abdominal segment II are bent dorsally forming a basket for the gill-opercula. Only tergalii II–IV are able for respiratory movements and serve as gills, while tergalii I serve as gill opercula and immovably lie horizontally (photo ). Unlike Oniscigaster/fg2, anal-proximal lobe of each tergalius II–IV [see Vetulata (2)] is bent dorsally, with smooth margin (according to Tillyard 1933, in lacuscoerulei [T.] this lobe is developed on tergalius IV only).