Protaenionema fuscalatus Liu and Shih

Liu, Yushuang, Sinitshenkova, Dong Ren Nina D. & Shih, Chung Kun, 2007, The oldest known record of Taeniopterygidae in the Middle Jurassic of Daohugou, Inner Mongolia, China (Insecta: Plecoptera), Zootaxa 1521, pp. 1-8 : 5-6

Protaenionema fuscalatus Liu and Shih , sp. nov.

Figs. 6–7

Etymology. The species name is taken from a combination of the Latin fuscus (meaning dark) and the Latin alatus (meaning winged).

Materials. Holotype, sex unknown. CNU, NMDHG 55, a well–preserved body with part of wings.

Description. Length of body 17 mm, to tip of wings 21 mm, color dark. Head large, subtriangular, the basal part twice as wide as the distal; antennae shorter than body. Thorax distorted and compressed laterally, structure unclear.

Forewing length 16 mm, opaque, fuscous. Vein Sc unites with R at 2/3 total wing length. Crossevein c–r absent, Rs oblique at the base, 2–branched, forked distal to cord. Vein M 2–branched from middle of wing, its branches nearly twice as long as Rs branches. Crossvein rs–m straight, parallels r–rs, connecting Rs proximal to r–rs, terminating at the proximal 1/3 of MA. Crossvein m–cua straight, connecting M stem and CuA stem. Branches of CuA not discernable, only the distal part of first branch of CuA preserved. At least 5 crossveins at the median area.

Abdomen with 10 visible segments, almost twice as long as thorax. Every segment is of almost same width except for the last two segments, and three to eight segments are relative longer than first two segments. The ninth sternite produced, greatly exceeding the 10th segment, its tip not upturned, broadly round; the 10th tergite short, sclerotized. Cerci short, multisegmented, its segments faint.

Legs robust, coxa and trochanter wide, femur short and brawny, nearly twice as wide as tibia, tibia slen- der, tarsi long, half length of tibia, the first segment slightly longer than the second one which is equal to the third segment. Claw short, wide basally.

Figures

FIGURES 6, 7. Protaenionema fuscalatus gen. et sp. nov. Holotype, CNU, NMDHG 55. Scale bar represents 2 mm, ventral view.