辽西海房沟组新的昆虫化石

NEW FOSSIL INSECTS OF HAIFANGGOU FORMATION, LIAONING PROVINCE

本文描述的标本是采自海房沟组,共五个新种两个新属:Blattula? liaoningensis s.n., Mesoprophalangopsis liaoxiersis g.s.n., Sinotettegarcta longa g.ss.nn., Palaeontinopsis Sinensis s.n., P. liaoensis s. n.

All insects specimen described in present paper were collected from the Middle Jurassic Haifanggou Formation (J2h).They contain five new species and two new genera, as follows. Blatiula? liao ningensis s.n.,Mesoprophalangopsis liaoxiensis g.s.n.,Sinotettegarcta longa g.s.n., Palaeontinopsis sinensis s.n., P. liaoxiensis s.n.These fossil inssct specimenr descrided in this paper were collected by Prof. Pan Guan in 1984 from the Upper Part of the Haifanggou Formation(J2h) in Western Liao-ning,locating at the 20°21'E and 40°58'N. According to the author's study resuet there are five species and refered to 4 genera,including 2 new genera and 5 new species, ana are described,as follows.1. Blattula? liaoningensis s.n. (Blattaria. Mesoblattinidae) (B1. 1-1)The new species is similar to the Blattula turanica Martynov, 1937 from the Lower Jurassic of the Central Asia, USSR, but differs from the later having in 9 radial branches, forking near the wing middle part,and M branching very simple. Wing remaning part 15 mm long.2. M esoprophalangopsis liaoningensis g.s.n. (Orthoptera. Haglidae) (P1. 1-2,3).It is closely related to the Sunoprophalangosis Hong, 1982,collected from the Jiu-longshan Formation(J2j)of N. Hebei Province, but differs from the later in the following aspects:1, by a short cross-vein combinating between the MP and CuA, (without MP + CuA);2.R branching less,about 1 or 2 branchesat most; 3. MA forking early somewhat near the furcating point of the MA and MP; 4. C so long, and longer than other genus of this family and reaching the wing middle part. Forewing remanning part 30 mm long.3. Palaeontinopsis sinensis s.n. (Homoptera: Palaeontinidae)(P1. II-1)The new species is resemble to the P. latipenis Martynov, 1937, but differs from the later having in M not symmaterical branching into the anoterior and the posterior branches, the former shorter than the later; the mcu cell longer than the rsm cell, the surface sculptured with regular and cross colouredbands. Forewing very large, remanning part 42 mm long,25 mm wide.4. Palaeontinopsis liaoxiensis s. n.(P1. II-2)The chief features of this pecies being closely relacted to the P. sinensis s.n., but differs from the later in following features.1. MA forking earlier than the MP, MA main stem shorter than that at MP; 2. Mp having 3 branches, M3 branching again; M4 base obliquely very long; 3. rsm cell longer and narrower than the mcu. Forewing about 42 mm long, 20 mm wide.5. Sinotettegarcta long g. sn. (Homoptera. Cicauoidea) (PI. II-3).The new genus is allied to Sunotettegarcta Hong, 1983,collected from the Jiulong-shan Formation(J2j)of Hebei Province,but differs from the later in the following features. 1. R + M length being equal to the R; Rs stetching from the R very late; R2 bent, running near the anterior margin and branching at the distal portion; M base connecting with the CuA, then meeting again with the Scp + R + M cross-veins (three cross-veins),situating on the same horizon.The new genus differs also from the Liassic Kisylia Martynov, 1937 by different from the branches. Forewing 13 mm long, 4 mm wide.The type secimens are preserved in the Beijing Natural History Meseum.Theme words insecta, animal fossil, blassaria, orthoptera, homoptera