Mnasthaia arverniorum, Szwedo, Jacek, Bourgoin, Thierry & Lefebvre, Fabrice, 2006

Szwedo, Jacek, Bourgoin, Thierry & Lefebvre, Fabrice, 2006, New Mnemosynini taxa (Hemiptera, Fulgoromorpha: Cixiidae) from the Palaeogene of France with notes on their early association with host plants, Zootaxa 1122, pp. 25-45 : 39

Mnasthaia arverniorum sp. nov.

( Figs. 27–28 )

MATERIAL: Holotype. No. MNHN­LP.R 63851, preserved in Museum national d’Histoire naturelle, Paris: dorsoventral compression with face, end of rostrum, margin of pronotum, left tegmen, partly left wing and fragments of abdomen visible.

TYPE LOCALITY: Menat, Puy­de­Dôme, France.

STRATIGRAPHIC POSITION: Upper Palaeocene (circa 58 Ma), volcanosedimentary, spongo­diatomite maar.

ETYMOLOGY: Named after Gallo­Celtic tribe Arverni, inhabiting Auvergne.

DIAGNOSIS: Combination of characters: postclypeus in mid line about twice as long as frons in mid line, tegmen 3.2 times as long as wide, RA with three terminalia, RP with two terminalia, M with five terminalia, CuA with three terminalia.

DESCRIPTION: Total length about 15 mm. Basal portion of tegmen light, with a few darker spots at longitudinal veins, distinct, arcuate, transverse band in apical portion; tegmen, including veins covered with chaetae.

Face long with median carina; Frons in mid line about 1.2 mm long; Postclypeus about 2.5 mm long in mid line, with distinct lateral carinae. Rostrum very long, distinctly exceeding hind coxae.

Tegmen about 10.5 mm long, with anterior margin mildly curved at base, without basicostal field, stigma elongate about six times as long as wide, clavus very long, slightly exceeding? of tegmen length; ScR forked near basal cell, RA with three terminalia, RP forked in apical portion, with two terminalia; M forked at the level of nodal line, with five terminalia, CuA forked basad of half of tegmen length, branch CuA1 forked in apical portion, CuA with three terminalia. Clavus with transverse veinlet between CuP and Pcu near base. transverse veinlet m­cu just apicad of M forking, second m­cu veinlet in apical portion, oblique, apical transverse veinlets do not form regular pattern.

Hind wing venation seems to be similar to pattern observed in Mnemosyne Stål.

Figures

FIGURES 27 – 28. Mnasthaia arverniorum gen. et sp. nov. Fig. 27. Right tegmen (partly reconstructed); Fig. 28. Face. Scale bar: 1 mm.