Taxonomic description and phylogenetic placement of two new species of Spalangiopelta (Hymenoptera: Pteromalidae: Ceinae) from Eocene Baltic amber

PeerJ

article

Marina Moser¹  Roger A. Burks³  Jonah M. Ulmer¹  John M. Heraty³  Thomas van de Kamp⁴  Lars Krogmann¹ 

[1] Department of Entomology;Institute of Biology, Systematic Entomology ,(190n), University of Hohenheim;Department of Entomology, University of California Riverside;Institute for Photon Science and Synchrotron Radiation ,(IPS), Karlsruhe Institute of Technology;Laboratory for Applications of Synchrotron Radiation, Karlsruhe Institute of Technology

关键词: Baltic amber;    µCT;    Character evolution;    Chalcidoidea;    Parasitoids;   

DOI  :  10.7717/peerj.10939

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

Spalangiopelta is a small genus of chalcid wasps that has received little attention despite the widespread distribution of its extant species. The fossil record of the genus is restricted to a single species from Miocene Dominican amber. We describe two new fossil species, Spalangiopelta darlingi sp. n. and Spalangiopelta semialba sp. n. from Baltic amber. The species can be placed within the extant genus Spalangiopelta based on the distinctly raised hind margin of the mesopleuron. 3D models reconstructed from µCT data were utilized to assist in the descriptions. Furthermore, we provide a key for the females of all currently known Spalangiopelta species. The phylogenetic placement of the fossils within the genus is analyzed using parsimony analysis based on morphological characters. Phylogenetic and functional relevance of two wing characters, admarginal setae and the hyaline break, are discussed. The newly described Baltic amber fossils significantly extend the minimum age of Spalangiopelta to the Upper Eocene.

【 授权许可】

CC BY