Discovery of a Flatidae planthopper (Hemiptera: Fulgoromorpha) in the Paleocene of Northern Tibet and its taxonomic and biogeographic significance Author Szwedo, Jacek Author Stroiński, Adam Author Lin, Qi-Bin text Geodiversitas 2013 2013-12-27 35 4 767 776 http://dx.doi.org/10.5252/g2013n4a2 journal article 10.5252/g2013n4a2 1638-9395 5373078 Priscoflata n. gen. TYPE SPECIES . — Priscoflata subvexa n. sp. by present designation. ETYMOLOGY. — Generic name is derived from the Latin “priscus” meaning “ancient” combined with generic name “Flata”. Gender: feminine. DIAGNOSIS. — Tegmen with costal area present, as wide as costal cell; costal area tapering apicad; apical margin arcuate; postclaval margin (tornus) absent; stems Sc+R, M and CuA leaving basal cell separately; stem Sc+R single to the apex of costal area; stem CuA straight and parallel to the claval suture (CuP); bulla present; lack of veinlets between CuA and CuP; single apical line of transverse veinlets present; distal portion of intermedial space between branches M 1b and M 2a with irregular veinlets, M 2b and M 3a fused for a distance. DISTRIBUTION. — Qingtao-Tibet Plateau, Qiangtang Basin, China . REMARKS The new genus bears tegminal features found in the representatives of the tribe Nephesini , as recently recognized:e.g., presence of bulla, stem CuA parallel to, but shifted from claval suture. With the genus Nivalios Zhang, Peng & Wang, 2011 it shares single line of apical veinlets; stems Sc+R and M leaving basal cell from the same point; stem Sc+RA single to the apex of costal area. Priscoflata n. gen. differs from Nivalios also by the costal area and costal cell of similar width (costal cell distinctly narrower than costal area in the latter) and by a few veinlets dissecting costal cell (single, oblique vein in the genus Nivalios ). However, the genus Priscoflata n. gen. presents also a number of unique features, i.e. very long clavus, reaching to the apical angle (feature not found among other Nephesini ); lack of postclaval area (tornus) (tornus always present in the Nephesini ); common portion of branches M 2b and M 3a (feature not found in remaining Nephesini ) and distal portion of intermedial space between branches M 1b and M 2a with irregular veinlets.