Cathayiblatta longata Li, Hong & Yang, 2007, sp. nov.

Cathayiblatta longata sp. nov. (Figs. 3–6) Description. Wing length 23.0 mm, wing width 8.0 mm. Forewing narrowing toward tip, lance-like. Wing (Fig.3, 4) 2.75 times longer than wide. Costal margin rather flat with weak arch, wing hind margin distinctly curved. Humeral small, occupying 0.15 of wing length, ScA around 0.43 of wing length, slightly shorter than wing, with at least 3 branches, ScP with 6 branches: ScP 1 –ScP 6, ScP 1 and ScP 4 forked, others not branched. R stem divided into RA and RP, RA stem distinctly longer than that of RP; two-branched RA, RP stem rather short, around 1 / 7 of RA stem, six-branched and 2–3 times branched except the fourth branch. R branched first, CuA second, M last. This makes M with the longest stem, CuA with secondary one and R with shortest one. Base of M arched, divided into MA and MP, MA 5.5 times longer than MP, oblique up to middle of wing apex; three-branched MA, the second branch forked; MP stem rather short, divided into 5 branches. MP with few branches, occupying lower part of wing margin; there is 1 curved arculus between MP and CuA, near the base of MP. Cu very short, divided into CuA and CuP, CuA also divided into CuAa and CuAb, CuAa and CuAb respectively divided into 4 branches; M and all the branches of CuAa and CuAb oblique up to wing margin. CuP obviously arched. Anal area shuttle-like, around 0.36 of wing length, divided into anterior and posterior branches: AA and AP; AA three-branched, basally sclerotized; AP eight-branched: AP 1 and AP 8 with 9 to 10 veins, AP 2 and AP 6 with secondary branches. Decoration (Figs. 5–6) between veins mainly lateral-cut, located in Sc and R areas. Cu–A area, especially CuA stem–CuP–AA–AP 1 –AP 3 with big net vein. Holotype: One complete and well-preserved forewing (part and counterpart) except for some margin broken. The broken parts do not affect the character of the wing venation. The holotype (BNHM –TH06– 1 –002) was deposited in Beijing Museum of Natural History (BNHM), Beijing, China. Locality and horizon: Hejiafang Village, Tongchuan City, Shaanxi Province, China; Tongchuan Formation, Middle Triassic. Etymology. The specific name refers to the shape of the wing.Published as part of Li, Zhu, Hong, Youchong & Yang, Ding, 2007, A new Middle Triassic genus and species of Mylacridae (Blattodea) from China, pp. 53-59 in Zootaxa 1660 on pages 56-57, DOI: 10.5281/zenodo.17991

Cathayiblatta Li, Hong & Yang, 2007, gen. nov.

Genus Cathayiblatta gen. nov. Type species. Cathayiblatta longata sp. nov. Diagnosis. Tegmen elongated, basally broad, and narrowing toward tip, lance-like. All the veins long and running parallel. Subcostal area cuniform and slightly shorter than wing. Three-branched ScA, six-branched ScP; R, M, CuA all divided into anterior and posterior parts: RA, RP, MA, MP, CuAa, CuAb; CuA and CuP combination near wing base, CuP stem short; RA stem and MA stem very short, but RP and MP rather long; RP with 6 branches, about three times branched; three-branched MA, occupying the middle of wing apex; three-branched MP, occupying the lower part of wing apex; CuA stem long, distinctly curved, forked later than R, CuAa with 4 branches, CuAb also with 4 branches, all the veins long and not forked, oblique up to wing margin; anal area large, spindle-like, shorter than Sc, with 10 branches, sometimes forked. Tegmen with irregular wave. The width from A 1 to A 10 narrower, especially between A 4 to A 10. The size of veins areas: R>CuA>M; the base of R, M, Cu and all the anal veins obviously sclerotized. Distribution. The genus is known only from China and is currently represented by one species. Etymology. From ancient name of China—Cathay, and Blatta, general suffix for blattids. Remarks. Mylacridae includes 4 subfamilies: Idiomylacrinae Handlirsch, 1906, Mylacrinae Sellards, 1904, Pteridomylacrinae Handlirsch, 1906 and Heminglacrinae Pruvost, 1919 (Becker-Migdisova 1962). Judging from the wing venation, it seems as if it is unsuitable to arrange the new genus into above 4 subfamilies. So, here we can only put the new genus into Mylacridae. A new subfamily may be erected when more evidence and specimens are found. At level of the genus, Cathayiblatta is somewhat similar to Hemimylacris Handlirsch, 1906, but it can be distinguished from Hemimylacris by the following characters: tegmen narrower and longer, costal margin flat; tegmen shape lance-like (not bean-like); subcostal area short obviously, not extended beyond midwing; ScA at least with 3 branches; ScP with few branches; cubital area large, 1 / 2 as large as tegmen; more and parallel upwards veins, and subdivided into anterior and posterior branches, CuP strongly curved; anal area shorter and wider, lance-like, 1 / 3 as long as tegmen, with 9 veins. In Hemimylacris, the tegmen is wider and short, and the wing is bean-like; the subcostal area is extended beyond midwing; ScA is invisible, ScP has more branches; the cubital area is small, not subdivided into the anterior and posterior branches; the anal area is narrower and longer, the anal area has 4 veins (Becker-Migdisova 1962). Cathayiiblatta is also somewhat similar to Metaxyblatta Handlirsch, 1906, but it can be distinguished from the latter by the cubital area with the parallel veins oblique to the wing margin, and subdivided into the anterior and posterior branches. In Metaxyblatta, the cubital veins are not subdivided into the anterior and posterior branches, and all the veins are pectinated and not oblique to the wing margin (Becker-Migdisova 1962).Published as part of Li, Zhu, Hong, Youchong & Yang, Ding, 2007, A new Middle Triassic genus and species of Mylacridae (Blattodea) from China, pp. 53-59 in Zootaxa 1660 on page 56, DOI: 10.5281/zenodo.17991