Manukyan A.R. 2025. Darwin wasp Furpherhombus gen.n. (Hymenoptera: Ichneumonidae: Pherhombinae) indicates faunal connections between the earliest Eocene Fur formation and late Eocene Baltic amber. Notes on the taphonomy and biology of Darwin wasps in amber // Russian Entomol. J. Vol.34. No.2: 265–273 [in English].
Kaliningrad Amber Museum, Marshal Vasilevskiy Square 1, Kaliningrad 236016 Russia.
Andranik Manukyan: manukyan@list.ru; https://orcid.org/0000-0001-9510-1880
doi: 10.15298/rusentj.34.2.09
ABSTRACT. The Darwin wasp Furpherhombus leleji gen. et sp.n. is being described from the late Eocene Baltic amber (~38.0–33.9 Ma). The new genus also includes the species F. parvulus Meier, Walker et Klopfstein, 2022 (comb.n.), previously described from the Danish earliest Eocene Fur Formation (~54 Ma). A hypothesis of a mechanism of ichneumonids getting trapped in the amber that takes into account different qualities of the initial resin, which may act in accordance with the laws of either a Newtonian or a non-Newtonian (Bingham) fluid, is proposed. For the extinct subfamily Pherhombinae, parasitization in cocoons of ants (Hymenoptera, Formicidae) is assumed.
KEY WORDS: Ichneumonidae, Pherhombinae, fossils, new species, Eocene.