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.