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Eotemnothorax rhytidus
| †Eotemnothorax rhytidus Temporal range: Priabonian, Late Eocene Baltic amber, Baltic Sea region | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Hymenoptera |
| Family: | Formicidae |
| Subfamily: | Myrmicinae |
| Tribe: | Crematogastrini |
| Genus: | Eotemnothorax |
| Species: | †E. rhytidus |
| Binomial name | |
| †Eotemnothorax rhytidus Radchenko, 2024 | |
Photo Gallery
Radchenko (2024), Figure 5. Photographs of workers of Eotemnothorax groehni, HOLOTYPE: (A) body, lateral view; Eotemnothorax balticus, HOLOTYPE: (B) body, left lateral view; (C) body, right lateral view; PARATYPE, ZIN 4/7: (D) body, lateral view; Eotemnothorax rhytidus, HOLOTYPE: (E) body, lateral view; (F) body, dorsal view.
Radchenko (2024), Figure 10. Photographs of details of mouthpart of workers of Eotemnothorax species: E. gracilis: (A) ZISK UA-2246, ventral view; (B) AMNH 40129-511; E. rhytidus, HOLOTYPE: (C) ventral view; E. punctatus, PARATYPES: (D) ZISK K-18127, ventral view; (E) SIZK K-9388, ventral view; (F) SIZK K-1943, head and mandibles, lateral view. White arrows indicate stipes of maxilla.
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Identification
Eotemnothorax rhytidus well differs from all known Eotemnothorax species with moderately long propodeal spines (except for Eotemnothorax rav) by the coarse rugose sculpture, combined with the smooth and shiny body surface, by abundant standing hairs, and bigger body size. It differs from E. rav by the distinctly longer petiole (PL/PH 1.40 vs. 1.15–1.16), longer propodeal spines, and especially by the shape of the frontal carinae: they do not curve outwards and do not merge with the rugae that surround antennal sockets in E. rhytidus, but they are curved outwards to merge with the rugae that surround the antennal sockets in E. rav.
Keys including this Species
Distribution
This taxon was described from Baltic amber, Baltic Sea region, Europe (Priabonian, Late Eocene) and Rovno amber, Baltic Sea region, Europe (Priabonian, Late Eocene).
Castes
Nomenclature
The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.
- †rhytidus. †Eotemnothorax rhytidus Radchenko, 2024: 737, Figs. 5E-F, 10C (w.) BALTIC AMBER (Eocene), ROVNO AMBER (Eocene).
Type Material
- Holotype worker, complete specimen, Baltic amber, 4943 (LIB) (CCGG 6787).
- Paratype worker, Rovno amber, F-083 (MKHC).
Localities. Poland, Baltic amber; Ukraine, Rivne Prov., Rovno amber, both late Eocene, Priabonian age, 37.8–33.9 Ma.