A new, enigmatic family for new genus and species of Polyneoptera from the Upper Permian of Russia
Author
Gorochov, Andrej V.
text
ZooKeys
2011
130
131
136
http://dx.doi.org/10.3897/zookeys.130.1487
journal article
http://dx.doi.org/10.3897/zookeys.130.1487
1313-2970-130-131
Genus
Alexarasnia Gorochov
gen. n.
Type species.
Alexarasnia rossica
sp. n.
Description.
Tegmen (Figs 1, 2) moderately narrow, with parallel Sc, RA, RS, branches of MA and MP+CuA1, and short distal part of CuA2; all areas between longitudinal veins more or less narrow; majority of them with intercalary veins; Sc slightly concave, without branches and with apex situated near middle part of costal edge; R+RA slightly convex, but all longitudinal veins between this vein and CuP neutral; R and MA with proximal bifurcation situated in proximal part of tegmen; RA and RS probably simple (single); MA with only two branches in proximal and middle parts of tegmen; proximal part of MP before anastomosis with CuA1 indistinct; MP+CuA1 with four branches as minimum; CuA2 with two branches forming cell-like structure looking as a result of fusion of their distal parts; CuP concave (area near this vein with distinctly concave fold shown in Fig. 1a by dotted line), oblique and straight, but with small distal part probably looking as a result of its fusion with CuA2; 1A hardly
convex
, similar to CuP in shape; 2A neutral, looking as a single, oblique, and straight vein (its branches somewhat similar to crossveins); true crossveins simple and sparse.
Figures 3-4.
Alexarasniidae
gen. et sp. indet., tegmen, specimen PIN 3840/1232 (part) 3 scheme of venation, 4 photograph of fossil. Scale bar 5 mm.
Included species.
Only the type species.
Etymology.
The genus is named in honor of the famous Russian paleoentomologist Prof. Alexandr P. Rasnitsyn.