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New species of Embolemidae (Hymenoptera: Chrysidoidea) from Cretaceous Burmese amber.

Abstract : Embolemidae (Hymenoptera: Chrysidoidea) are parasitoid wasps whose biology is particularly unknown. These insects, present in the fossil record since the Lower Cretaceous, today have a cosmopolitan distribution. The current species are divided into 3 genera: Embolemus Westwood, 1833; Ampulicomorpha Ashmead, 1893 and Trogloembolemus Olmi et al., 2014. Three new species of Embolemus and two new species of Ampulicomorpha are described from Cretaceous Burmese amber (ca. -99 Ma). The specimens of the genus Embolemus constitute the first occurrence outside Europe and more particularly in Asia. One female and five males of this genus were found within the same fragment, which would hypothetically be the first observation of a reproductive behaviour in Embolemidae. Ampulicomorpha females, considered as macropterous in the descriptions, can also be brachypterous according to A sp. nov. 1, at least in the Upper Cretaceous. In addition, interspecific variability generally seems to be restricted to continuous traits such as antenna, scape or eye size. Intraspecific variability seems to be reduced or absent, which has notably been observed in the specimens of Embolemus ruddii Westwood 1833 preserved at the National Museum of Natural History in Paris. Finally, it seems that Embolemus and Ampulicomorpha already coexisted in the Cretaceous Myanmar's tropical forests.
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https://hal-insu.archives-ouvertes.fr/insu-02404871
Contributor : Isabelle Dubigeon <>
Submitted on : Wednesday, December 11, 2019 - 3:28:42 PM
Last modification on : Tuesday, September 1, 2020 - 11:48:02 AM

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  • HAL Id : insu-02404871, version 1

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Elvis Guillam, Cédric Chény, Bo Wang, André Nel, Vincent Perrichot. New species of Embolemidae (Hymenoptera: Chrysidoidea) from Cretaceous Burmese amber.. 1st Asian Palaeontological Congress, Nov 2019, Beijing, China. pp.110-111. ⟨insu-02404871⟩

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