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New maimetshid wasps in Cretaceous amber from Myanmar (Insecta: Hymenoptera)

Abstract : The extinct, exclusively Cretaceous wasp family Maimetshidae is newly recorded from Earliest Cenomanian Burmese amber. Two new genera and species are described. Burmaimetsha concava gen. et sp. nov., based on a male and a female, is most similar to Guyotemaimetsha Perrichot, Nel & Néraudeau, from Albian-Cenomanian French amber, but differs in its larger mandibles, distinctly concave face, elongate antennomeres, and forewing with cell [1Rs] smaller and fourth abscissa of Rs shorter. Maimetshasia kachinensis gen. et sp. nov., is based on a male, and is characterized by asymmetric mandibles with two and three teeth, by its forewing venation without cross-vein 2rs-m, with cell [1M] large and trapezoidal, and vein 2Rs + M very short, and by the hind wing without a free apex of Rs. The family was evidently widespread in the Cretaceous, and the new records extend the paleobiogeographical range to the South-East of Eurasia. A discussion about the possible biology of Maimetshidae is provided.
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Submitted on : Thursday, March 28, 2013 - 9:01:31 AM
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Vincent Perrichot. New maimetshid wasps in Cretaceous amber from Myanmar (Insecta: Hymenoptera). Annales de Paléontologie, Elsevier Masson, 2013, 99, pp.67-77. ⟨10.1016/j.annpal.2012.10.002⟩. ⟨insu-00805479⟩



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