New Wasps of Maimetshidae (Hymenoptera: Ceraphronoidea) from the Mid-Cretaceous Myanmar Amber.

One new genus and five new species of the extinct family Maimetshidae from mid-Cretaceous Kachin amber are described based on five well-preserved specimens as follows: Li, Kopylov and Rasnitsyn, sp. nov.; Li, Kopylov and Rasnitsyn, sp. nov.; Li, Kopylov and Rasnitsyn, sp. nov.; Li, Kopylov and Rasnitsyn, sp. nov.; and Li, Kopylov and Rasnitsyn, sp. nov. A new generic synonymy is proposed: Rasnitsyn, 1990 (= Engel, 2016, syn. nov. and = Perrichot, Azar, Nel and Engel, 2011, syn. nov.); Perrichot, Nel and Néraudeau, 2004 (= Perrichot, 2013, syn. nov.); , Rasnitsyn and Brothers, 2009 (=, Rasnitsyn and Brothers, 2009, syn. nov.); and Ortega-Blanco, Delclòs and Engel, 2011 are transferred to Rasnitsyn and Brothers, 2009. This results in the following new combinations: , Rasnitsyn and Jarzembowski, 1998, comb. resurr.; (Perrichot, Azar, Nel & Engel, 2011), comb. nov; (Rasnitsyn & Brothers, 2009), comb. nov; and (Ortega-Blanco, Delclòs & Engel, 2011), comb. nov. The occurrence of various genera of Maimetshidae in amber and compression fossil and the morphological differences of the forewings in all the fossil species are provided, which highlights a high level of genus-level diversity among Mesozoic maimetshids. The key to genera was updated.