Abstract
Fossil hymenopterans incorporating two new species, Nevania deviata sp. nov. and Praeaulacon grossus sp. nov., and one new specimen of Praeaulacus scabratus referred to Praeaulacidae, together with another new species, Proapocritus habitus sp. nov., assigned to Ephialtitidae are described. These taxa were collected from outcrops of the Middle Jurassic Haifanggou Formation at Yujiagou village near Beipiao in Liaoning Province, China. We also summarize the distribution, stratigraphical range and diagnostic forewing character states of the genus Nevania to assess interspecific venational differences. Our study thus recognizes substantial diversity amongst the Middle Jurassic species of this lineage.
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