A new parasitoid wasp (Hymenoptera: Chalcidoidea) from the Lower Cretaceous Crato Formation of Brazil: The first Mesozoic Pteromalidae |
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| Institution: | 1. Center for Mechanics and Materials and AML, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China;2. Department of Engineering Mechanics, Zhejiang University, Hangzhou 310027, China;3. Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Zhejiang University, Hangzhou 310027, China;4. Department of Civil Engineering and Department of Applied Mathematics, University of Akron, Akron, OH 44325, USA |
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| Abstract: | A new genus and species of small (3.5 mm excluding ovipositor) parisitoid wasp is described from the Lower Cretaceous (Aptian) Crato Formation Lagerstätte of Brazil. Parviformosus wohlrabeae gen. et sp. nov. is known from a single female imago and is assigned to Pteromalidae. It is diagnosed by the robustness of the scutellum, the structure, size and positioning of the mesopleuron, the complexity of the propodeum–petiole junction and a posteriorly curved dorsal ‘lip’ on metasomal segment 4. At only 3.5 mm in length, P. wohlrabeae is the smallest fossil wasp from the Cretaceous of South America and the first Mesozoic representative of Pteromalidae. |
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| Keywords: | Brazil Crato Formation Aptian Hymenoptera Chalcidoidea Pteromalidae |
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