Parvifuzia peregrina Wei, Liang & Ren, 2012

Taxonomy

Cockroach

Kingdom: Animalia
Phylum: Arthropoda Latreille 1829
Class: Insecta Linnaeus 1758
Order: Blattida Latreille, 1810
Family: Fuziidae Vršanský, Liang & Ren, 2009
Genus: Parvifuzia
Species: Parvifuzia peregrina
Author Citation Wei et al., 2012

Geological Time Scale

Eon: Phanerozoic
Era: Mesozoic
Period: Jurassic
Sub Period: None
Epoch: Middle
International Age: Callovian to Oxfordian

Stratigraphy

Jiulongshan Formation
Daohugou Bed

Provenance

Acquired by: Purchase/Trade

Dimensions

Length: 10 mm

Location

Daohugou Village
Ningcheng County
Inner Mongolia
China

• daohugou
• inner mongolia
• middle jurassic
• parvifuzia
• tff-oilshale-ar2548

Comments

There are additional unidentified conchostraca (clam shrimps, arthropods) on the slab. 

The age of the Daohugou strata has been notoriously difficult to determine, and a number of studies have produced conflicting results. Gao and Shubin reported an Argon-argon dating age of 164 ±4 million years ago (Middle to Late Jurassic, Bathonian to Oxfordian), this opinion is now widely accepted. 

Taxonomy according to Wei et al., 2012.

Line drawing from Wei et al., 2012.

Description according to Wei et al., 2012: “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.”

Identified by oilshale using Wei et al., 2012.

References:
Wei D. D., Liang J. H.  and Ren D. (2012) A new species of Fuziidae (Insecta, Blattida) from the Inner Mongolia, China. ZooKeys 217: 53–61.
Gao, K. -Q. and Shubin, N. H. (2012) Late Jurassic salamandroid from western Liaoning, China. Proceedings of the National Academy of Sciences. 109 (15): 5767–72.