江西弋阳梅溪早侏罗世昆虫  

SOME EARLY JURASSIC INSECTS FROM MEIXI OF YIYANG COUNTY, JIANGXI

作　　者：黄兆祺[1] 李富玉 林启彬[1] 

机构地区：[1]中国科学院南京地质古生物研究所,南京210008 [2]煤田地质勘探公司江西省223地质勘探队,鹰潭335000

出　　处：《古生物学报》1991年第5期647-653,682,共7页Acta Palaeontologica Sinica

摘　　要：本文描述了产于江西弋阳梅溪门口山组昆虫化石4属、4种,其中1新属、1新种。根据化石可确定含化石地层时代为早侏罗世。这些昆虫化石的发现使中生(虫非)蠊化石组合的分布范围北延至赣东北。Here described are 4 genera and species of fossil insects from Meixi of the Yiyang Basin in Northeast Jiangxi. The fossil insect-bearing bed lies in the lower part of the Lower Jurassic Menkoushan Formation, which is a coal-bearing sedimentary formation widely exposed in this area. The Lower Jurassic insects have been known from other parts of South China, but not from Jiangxi in the past. The insect fauna studied in the present paper can be referred to the Early Jurassic Mesoblattino Assemblage of South China (Lin, 1986). Description of New Species Family Geinitziidae Handlirsch, 1906 Genus Meixiella gen. nov. Type species Meixiella postiretis gen. et sp. nov. Fore-wing Subcastal area broad, Sc vein long. R vein with 3 branches at apical part, each of which bends forward and ends in the fore margin; Rs separating from R vein at one-third of wing and having 6 branches. MA branching earlier than Rs, with 4 branches; Mp with 2 branches. CuA same as Mp; Cup single, but strong. With dense cross-veins in the basal part of the wing and having 'H' or 'Y'-shaped cross-vein present between CuA, Cup and A1. Comparison The genus Meixiella is closely allied to Nivopteria Lin, 1978, but differs from the latter in its more branches and 'H' or 'Y'-shaped cross-veins present in Rs, M and CuA fields of the fore wing; in some features the new genus is also similar to Shurabia, but differs from the latter in the branches of main veins of the fore wing which occur earlier than those of Shurabia, and with 'H' and 'Y'-shaped cross veins between Rs ana A veins. Meixiella postiretia gen. et sp. nov. (Pl. Ⅰ, fig. 6; text-fig. 4) Complete fore wing is elliptical, with rounded apical margin and out-bending to the costal margin; the hind margin of the fore wing is straight. The length of the fore wing is 18mm, and the width 7mm. Venation Subcosta (Sc) with 14 obligue branches, all of which ending at costal margin of each; subcostal area bro

关 键 词：昆虫纲 早侏罗世 弋阳 江西 

分 类 号：Q915.819.7[天文地球—古生物学与地层学]