普草蛉属 Mesypochrysa Martynov, 1927 隶属于脉翅目草蛉科昆虫中的绝灭亚科篱草蛉亚科, 是该科中最为古老的属。该属内种间的主要区分特征有前翅亚前缘基横脉0–2支; Rs支脉7–26支; m-cu横脉2、3支; CuA+MP 末端 4–7 栉状分支; 1A 和 2A 二分叉或不分叉。该属的中阶普草蛉 Mesypochrysa intermedia Panfilov, 1980 鉴定特征主要为前翅亚前缘基横脉 1 支; Rs 约 14 分支; 具 1m-cu 横脉; CuA+MP 末端 6 栉状分支; 1A 和 2A 不分叉。 该种此前已发现多块标本, 均为前翅, 仅有一块归于中阶普草蛉(近似种) Mesypochrysa cf. intermedia 的残缺标本 NIGP 161886 保存有后翅。本文基于在中国内蒙古自治区赤峰市宁城县道虎沟村中侏罗统九龙山组地层中新发现的保存有近乎完整前后翅的标本, 补充修订了中阶普草蛉的种征, 并对中阶普草蛉(包括近似种)标本存在的问题, 普草蛉属与中生代其他属的差异, 以及该属内各物种的鉴定特征进行了讨论。
The genus Mesypochrysa Martynov, 1927 (Neuroptera: Chrysopidae: Limaiinae) is the oldest genus in the subfamily Limaiinae. The species of this genus can be identified by the numbers of basal subcostal crossveins (0–2), the branches of Rs (7–26), m-cu crossveins (2, 3), the pectinate branches of CuA+MP (4–7), and the pattern of forking of 1A and 2A (forked or not) in the forewing. Mesypochrysa intermedia Panfilov, 1980 is characterized by the presence of one basal subcostal crossvein in the forewing; Rs with about 14 branches; the presence of 1m-cu crossvein; CuA+MP with 6 distal pectinate branches; and 1A, 2A not being forked. Many specimens of this species have been found, but most of them are preserved with only forewings, except one specimen of Mesypochrysa cf. intermedia (NIGP 161886) which has an incomplete hind wing. A new specimen with nearly complete forewings and hind wings of this species was collected from the Middle Jurassic Jiulongshan Formation in Daohugou Village, Ningcheng County, Chifeng City, Inner Mongolia, China. Based on observation of this specimen, we revise the diagnosis of Mesypochrysa intermedia. The recorded specimens of M. intermedia, the differences among the genus Mesypochrysa and other genera of the Mesozoic, as well as the characteristics of each species of Mesypochrysa are also discussed in detail.
第三批宁夏青年科技人才托举工程项目(TJGC2018099), 宁夏自然科学基金项目(2020AAC03462), 国家自然基金(32070425,42072012)联合资助