Article (Scientific journals)
The first fossil record of the cuckoo wasp genus Primeuchroeus in Eocene Baltic amber, with revision of two fossil Chrysididae (Hymenoptera: Chrysidoidea).
Brazidec, Manuel; Rosa, Paolo; Perrichot, Vincent
2024In Annales de Paléontologie, 110 (3), p. 102682
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Keywords :
Aculeata; Chrysidoidea; Cretaceous; Insecta; Neogene; Paleogene; Revisionary systematics; Paleontology
Abstract :
[en] Chrysididae fossils are rare and understudied compared to their extant diversity, with an overwhelming proportion of genera found in Cenozoic fossiliferous deposits currently thought to be extinct. Here, we document the oldest known representative of the extant genus Primeuchroeus Linsenmaier, 1968 based on a specimen from Priabonian (upper Eocene) Baltic amber, and described as Primeuchroeus groehni sp. nov. This finding is the oldest Chrysididae fossil indisputably attributed to an extant genus and refutes the hypothesis that modern genera are not older than Neogene in age, as hitherto believed. Additionally, we propose the reallocation of a recently described fossil genus and fossil species. The genus Sphaerocleptes Cockx et al. (2016), described in the subfamily Cleptinae from Cenomanian French amber, is transferred to Chrysidinae, tribe Elampini; this is the first temporal occurrence for the tribe, previously not known earlier than the upper Eocene. The fossil species Hedychridium rosai Brazidec and Perrichot, 2023 is transferred from the subfamily Chrysidinae to Amiseginae and we propose the new combination Atoposega rosai (Brazidec and Perrichot, 2023) comb. nov. These findings provide deep insights into the evolution of Chrysididae: within the Chrysidinae subfamily, established by the mid-Cretaceous, some of the modern generic lineages had already diverged by the upper Eocene, and the Miocene Chrysididae fauna was likely similar to the extant fauna, pending further discoveries. Based on our observations, the fossil record of Chrysididae shows more similarities to that of other diverse hymenopteran families than was previously thought.
Disciplines :
Zoology
Author, co-author :
Brazidec, Manuel;  Université de Rennes, CNRS, Géosciences Rennes, UMR 6118, Rennes, France ; Institut de Systématique, Évolution, Biodiversité (ISYEB), Muséum national d'Histoire naturelle, CNRS, Sorbonne Université, EPHE, Université des Antilles, Paris, France ; State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Paleoenvironment, Chinese Academy of Sciences, Nanjing, China
Rosa, Paolo  ;  Université de Mons - UMONS > Faculté des Sciences > Service de Zoologie
Perrichot, Vincent;  Université de Rennes, CNRS, Géosciences Rennes, UMR 6118, Rennes, France
Language :
English
Title :
The first fossil record of the cuckoo wasp genus Primeuchroeus in Eocene Baltic amber, with revision of two fossil Chrysididae (Hymenoptera: Chrysidoidea).
Alternative titles :
[fr] Le premier fossile de guêpe coucou du genre Primeuchroeus dans l'ambre éocène balte, avec révision de deux Chrysididae fossiles (Hymenoptera : Chrysidoidea)
Publication date :
July 2024
Journal title :
Annales de Paléontologie
ISSN :
0753-3969
Publisher :
Elsevier Masson s.r.l.
Volume :
110
Issue :
3
Pages :
102682
Peer reviewed :
Peer Reviewed verified by ORBi
Research unit :
S869 - Zoologie
Research institute :
R100 - Institut des Biosciences
Available on ORBi UMONS :
since 25 August 2024

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