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1 July 2009 The First Xyelotomidae (Hymenoptera) from the Middle Jurassic in China
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Abstract

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-branched, to two separate parts, to apical part forming a crossvein, and finally to vestigial in Xyelotomidae from the Early Jurassic to the Early Cretaceous.

© 2009 Entomological Society of America
Taiping Gao, Dong Ren, and Chungkun Shih "The First Xyelotomidae (Hymenoptera) from the Middle Jurassic in China," Annals of the Entomological Society of America 102(4), 588-596, (1 July 2009). https://doi.org/10.1603/008.102.0402
Received: 13 January 2009; Accepted: 1 March 2009; Published: 1 July 2009
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