Parvifuzia peregrina Wei, Liang & Ren

Wei, Dandan, Liang, Junhui & Ren, Dong, 2012, A new species of Fuziidae (Insecta, Blattida) from the Inner Mongolia, China, ZooKeys 217, pp. 53-61 : 53-55

Parvifuzia peregrina Wei, Liang & Ren sp. n. Figs 1-3

Diagnosis.

Apex of wing almost reaching the end of the abdomen, forewing venation with 30-32 veins at margin.

Comments.

Parvifuzia peregrin a sp. n. is similar to Parvifuzia marsa Guo & Ren, 2011 in the following aspects: small-sized; apex of cerci strongly curved inward and rounded in shape, with a narrow gap at the center; wing venation simple; forewing R strongly curved like waves, CuA almost straight, then curved to posterior wing margin, anal area wide.

However, Parvifuzia peregrin a sp. n. can be easily differentiated from the other two previously described species: apex of wing almost reaching the end of the abdomen in Parvifuzia peregrin a sp. n. vs. apex of wing just reaching the middle of the 8th abdominal segment; forewing length is longer (forewing length 8.5-8.8 mm in Parvifuzia peregrin a sp. n., vs. forewing length 6.3-6.4 mm); and forewing venation with 30-32 veins at margin in Parvifuzia peregrina sp. n., vs. forewing venation with 25-27 veins at margin.

Description.

Small-sized, body length about 10.4-10.6 mm (with head), width 2.8-3.1 mm; head small, significantly elongated (length/width= 1.4-1.6 mm/1.3-1.4 mm), antennal socket conspicuous at sides, mouthparts unclear; pronotum length 1.6-1.9 mm, width 2.3-2.7 mm, elliptical, as wide as the body; abdomen 6-7 segments visible, terminal sternum rounded; long cerci has 14 segments and apex of cerci strongly curved inward and rounded in shape, forming a narrow gap at center (Fig. 3A), segments of cerci joined together after the 8th segment.

Forewings (Figs 1, 2, 3B): length range about 8.5-8.8 mm, width range about 2.6-2.9 mm; narrow, without coloration, with intercalaries and wing venation simple, with 30-32 veins at margin; costal area wide (1/3 width of the wing); Sc simple, curved upward, longer than clavus; R strongly curved like waves and with 9-14 branches, reaching the anterior wing margin; M slightly curved and with 5-7 branches, most posterior branch of M reaching wing apex; CuA almost straight to posterior wing margin and with 5-8 branches; CuP strongly curved and simple; clavus short, less than a third of the wing’s length; A simple, arc bending and with about 4 veins.

Hind wings: length about 6.5-7.1 mm, width of remigium 2.8-3.5 mm; with intercalaries and without pterostigma; with about 22 veins of remigium; Sc simple, sometimes unclear; R terminating to wing apex, differentiated into darkened R1 with 2-3 branches and Rs with 7-9 branches; M almost straight to posterior wing margin, with 3-5 branches; CuA with about 7 branche s.

Legs: length of fore femora 1.16-1.49 mm and tibiae 1.16-1.22 mm, length of mid femora 1.89-1.93 mm and tibiae 1.47-1.56 mm, length of hind femora 2.12-2.19 mm and tibiae 2.59-3.45 mm; legs gradually get longer from the front to the hind legs; mid and hind leg with spines on the tibiae.

Materials.

Holotype, A completely preserved male specimen, CNU-BLA-NN-2011055. Paratypes, CNU-BLA-NN-2011056, CNU-BLA-NN-2011057.

Type locality and horizon.

Jiulongshan Formation; Daohugou Village, Wuhua Township, Ningcheng County, Inner Mongolia, China; Middle Jurassic.

Etymology.

The specific name is derived from the Latin word “peregrinus”, (meaning “strange”), for this new species is special for specific characters.