Triassolitophlebia palegica Sinitshenkova & Aristov

Sinitshenkova, Nina D., Aristov, Daniil S., Wegierek, Piotr & Żyła, Dagmara, 2015, New mayfly genera from the Middle Triassic of Poland and their evolutionary and paleogeographic implications (Ephemerida: Litophlebiidae, Vogesonymphidae), Zootaxa 3949 (2), pp. 281-288 : 283

Triassolitophlebia palegica Sinitshenkova & Aristov , sp. nov.

Figure 1

Type. Holotype no. ZPAL V.44.I/308, Institute of Paleobiology, Polish Academy of Sciences, positive imprint of the forewing.

Type locality and horizon. Pałęgi, Holy Cross Mountains ( Poland), Olenekian-Anisian, Middle Triassic.

Diagnosis. Same as for the genus.

Description. Forewing length: 9.06; maximum width: 2.80. First branching of RS in basal third of wing; MA divided distally to branching of RS and clearly basally to wing middle. MP branches almost straight; CuA and CuP clearly S-shaped; A1 relatively long. Crossveins straight and dense, with cells between them almost square.

Remarks. It is possible to recognize five longitudinal veins in the RS system in the forewing. The preservation of the wing apex is poor, and so the existence of two more veins, even though they are not visible, cannot be ruled out, judging by the intervals between the visible veins. The fore margin of the wing is not completely preserved, and so there is only the SC fragment reaching the wing middle. On the wing apex, two convex veins can be seen clearly –C and R – and no other concave vein which could be SC can be seen between them. Undoubtedly, SC does not reach the wing apex, which means that this vein is short, in any case shorter than that of Litophlebia . The crossveins are drawn only at the wing base between CuP and A.

Etymology. The name derives from the Pałęgi site.

Figures

FIGURE 1. Triassolitophlebia palegica, gen. et sp. nov., holotype, ZPAL V. 44. I / 308. A. Fore wing. B. Fore wing, line drawing.