Sobytie tungusicum

Vršanský, Peter, 2010, A new genus and species of cockroach (Blattida: Phyloblattidae) from the Permian / Triassic boundary beds of Tunguska Basin in eastern Siberia, Russia, Zootaxa 2353, pp. 55-61 : 57-59

Sobytie tungusicum gen. et sp.n.

( Figs. 1–2 )

Holotype. PIN 2010/ 16 (14). Part and counterpart of all four wings (two complete). Russia, Krasnoyarsk Territory, Bugarikta River, Bugarikta Formation (lower part).

Description. Forewing length 12 mm. Sc with 6 veins meeting margin, one Sc branch dichotomised. R1 with 11, RS with 7 veins ending at margin. The basalmost R branched terminally. M and CuA each ending with 7 veins at margin. Diagonal kink (pseudovein in clavus) separating the posteriormost third of clavus distinctly. Characteristic V-shaped reticulation apparent in cubital, medial and the two most apical radial areas. Main veins dark, appearing black when compared with paler brown intercalaries and rest of wing. Coloration monochromatic, probably pale brown.

Hindwing Sc simple. R1 is only indicated by the basalmost branch with 4 veins at margin; RS expanded, with 9 veins meeting margin. M reduced to 4 veins. CuA with seven veins at margin and an additional blind branch. A1 with 3 basal branches. Hindwing without coloration.

Derivation of name. The specific name tungusicum is derived from the major river of the region, the Nižnaja Tunguska River.

Figures

FIGURE 1. Sobytie tungusicum gen. et sp. n. Holotype PIN 2010 / 16. A. Complete right fore and hind wings; B. Schematic indicates position of intercalaries, main veins and membrane. Forewing length 12 mm.

FIGURE 2. Sobytie tungusicum gen. et sp. n. Holotype PIN 2010 / 16. Part showing right fore and hindwings (B) and counterpart PIN 2010 / 14 (A) showing left forewing and both hindwings; C. Detail of left forewing; D. Detail of forewing venation showing convex membrane fold with merged intercalaries on the bottom side; E. Fenestrate part of the hindwing venation; F. Reticulate part of the right clavus; G. Triangular V-shaped cross veins in the forewing. Forewing length 12 mm. All originals except for B (orig. by D. Shcherbakov). Scales 1 mm.