Blattinopsis indefinitus Rasnitsyn et Aristov, 2021

Rasnitsyn, A. P. & Aristov, D. S., 2021, New species of the genus Blattinopsis Giebel, 1867 (Insecta: Blattinopsida: Blattinopsidae) from the Permian of Taimyr Peninsula, Russia, Far Eastern Entomologist 437, pp. 6-9 : 6-8

Blattinopsis indefinitus Rasnitsyn et Aristov , sp. n.

http://zoobank.org/NomenclaturalActs/ BAB6D8DB-5290-460A-AE45-1E0293C43596

Figs 1, 2

MATERIAL. Holotype PIN, № 2013/1, negative imprint of incomplete and somewhat deformed forewing; Russia: Krasnoyarsky krai, Taimyrsky Dolgano-Nenetsky District,

Fokina River, outcrop 10, sample 2036, Fokina locality; Lower Permian, upper Kungurian

Stage, Burgukli Horizon; collected by A.B. Gurevich, 1961; kept at the Paleontological

Institute, Russian Academy of Sciences, Moscow ( PIN).

1 – forewing; 2 – reconstruction of forewing.

DESCRIPTION. Large insect. Forewing fore margin convex. Costal space at RS base a little narrower than subcostal space. SC reaching just after wing midlength, with dense, thin,

simple and Y-like fore branchlets. R S-like bending behind SC apex, with dense, thin,

simple fore branchlets. RS base in wing basal quarter, starting with the only stalk, regularly backward pectinate, with 11 or more main branches. M branching from after wing midlength,

with two or more branches. CuA branching since near its midlength, behind M 5 apex, with fore branch dividing into two or more branches and hind one with four or more branches forming backward comb. А 1 simple, А 2 with four main branches. Crossveins dense, simple or,

in distal wing half, forming cell rows, or else with dense archediction distally in interradial space and behind A 2. No longitudinal folds between main veins.

MEASUREMENTS. Forewing fragment length 28 мм, full wing length probably about

40 mm.

COMPARISON. New species is assigned to Blattinopsis based on dense crossveins and absence of longitudinal folds between main veins, as opposed to crossveins rare (if at all) and folds present in the other constituent genus Glaphyrophlebia (Kukalová, 1959, 1965;

Carpenter, 1966; Müller, 1977; Hörnschemeyer & Stapf, 2001). New species is most similar to B. kukalovae Carpenter, 1966 from the lower Kungurian fossil locality Elmo (Leonardian

Stage of Kansas, USA) in having the only stem RS. It differs from latter species in having RS

forming regular hind comb and in larger wing size, while B. kukalovae has RS branching irregularly and wing size some 22 mm long (Carpenter, 1966).

ETYMOLOGY. From Latin indefinitus (indefinite).

Figures

Figs 1, 2. Blattinopsis indefinitus Rasnitsyn et Aristov, sp. n., holotype PIN, № 2013/1.