The First Xyelotomidae (Hymenoptera) From the Middle Jurassic in China
The First Xyelotomidae (Hymenoptera) From the Middle Jurassic in China
复制标题
中国中侏罗世第一个木蝇科（膜翅目）
DOI：
10.1603/008.102.0402
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发表时间：
2009-07-01
影响因子：
2.3
通讯作者：
Shih, Chungkun
中科院分区：
文献类型：
--
作者：
Gao, Taiping;Ren, Dong;Shih, Chungkun
本文记述了中国膜翅目（Hyplotomidae）的三个新属、三个新种和两个已知属的两个新种。这些标本分别采自中侏罗世九龙山组道虎沟和晚侏罗世至早白垩世义县组大王杖子地层。本文提供了一个木蠹科已知属和新属检索表。从早侏罗世到早白垩世共发现14属20种化石，表明该时期的木蠹科种类丰富，数量丰富。新的发现提供了从早侏罗世到早白垩世，Xyelotomidae前翅Sc脉由两个分支到一个分支，再到两个独立部分，再到顶端部分形成横脉，最后到退化的演化和过渡证据。
Three new genera with three new species and two new species of two known genera, all in the family of Xyelotomidae (Hymenoptera), are described and illustrated. These specimens were collected from the Middle Jurassic of Daohugou, Jiulongshan Formation, and the Late Jurassic to Early Cretaceous of Dawangzhangzi, Yixian Formation, of China. A key to the known and new genera of Xyelotomidae is provided. Fourteen fossil genera with 20 species found so far from the Early Jurassic to the Early Cretaceous imply that Xyelotomidae was diverse and abundant during that period. New findings reported here provide additional evolutionary and transitional evidence of forewing Sc vein changed from two-branched to one-branebed, to two separate parts, to apical part forming a crossvein, and finally to vestigial in Xyelotomidae from the Early Jurassic to the Early Cretaceous.