Opistocladus, Carpenter, 1976

Aristov, D. S., 2020, Revision of the genera Heteroptilon, Nugonioneura and Opistocladus from the Lower Permian of USA (Insecta: Cnemidolestida: Tillyardembiidae, Nugonioneuridae and Parmapteridae), Far Eastern Entomologist 401, pp. 1-9 : 7

Opistocladus arquatus Carpenter, 1976

Figs 5, 6

Opistocladus arquatus Carpenter, 1976: 342, fig. 4; 1992: 126; Béthoux & Nel, 2002: 25;

Béthoux et al., 2003: 278.

MATERIAL. Holotype MCZ, № 5882, positive and negative imprints of forewing; United States, Kansas, Dickinson County, Banner Township, 5 km southeast of Elmo town , Elmo locality; Lower Permian , Lower Leonardian , Sumner Group ,

Wellington Formation, Carlton Member; in MCZ.

REDESCRIPTION. Anterior branches of ScA sparse. RS with 2-3 branches.

MA and MP are simple prior to wings distal third. CuA+М 5 with three or more branches, posterior branch of CuA simple. А 1 with three branches, А 2 simple or with two branches. Transverse veins simple.

MEASUREMENTS. Forewing length about 15 mm.

Figures

Figs 5, 6. Opistocladus arquatus Carpenter, 1976, forewing, holotype MCZ, № 5882.