.jpg){kind=logo}
Myrmica electrina
| †Myrmica electrina Temporal range: Priabonian, Late Eocene Rovno amber, Ukraine, Bartonian, Middle to Late Eocene Baltic amber, Baltic Sea region | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Hymenoptera |
| Family: | Formicidae |
| Subfamily: | Myrmicinae |
| Tribe: | Myrmicini |
| Genus: | Myrmica |
| Species: | †M. electrina |
| Binomial name | |
| †Myrmica electrina Radchenko, 2023 | |
Photo Gallery
,_Fig._3.jpg)
Identification
Meso- and metatibiae without spur; head, mesosoma and waist coarsely sculptured; upper lateroventral corners of head somewhat pointed; eyes located approximately at midlength of sides of head; scape very feebly curved at base (similar to modern Myrmica rubra), without any angle, lobe or carina; mesosoma relatively short; petiole rather long, but high; propodeal spines directed mainly backward (seen in profile), curved down along their length and slightly divergent (seen from above).
For differences from Myrmica longispinosa, Myrmica rudis, Myrmica intermedia and Myrmica eocenica see those species.
It is clearly distinguished from Myrmica dictyosa by the mostly coarsely sinuously longitudinally rugosed mesosoma and waist, but the entire mesosoma is coarsely reticulate in the latter species. M. electrina well differs from Myrmica damzeni by the shorter and more robust mesosoma and shorter and higher petiole (ML/MH ≤ 2.50, PL/PH 1.29 vs. ML/MH 3.00, PL/PH 1.58 in the latter). Myrmica saxonica differs from M. electrina by the pectinate spurs on the metatibiae, not pointed upper lateroventral corners of the head, the distinctly shorter propodeal spines, which are strongly widened at the base, massive and somewhat curved inwards, and by the less coarse body sculpture.
Keys including this Species
Distribution
This taxon was described from Rovno amber, Baltic Sea region, Europe (Priabonian, Late Eocene) (holotype) and Baltic amber, Baltic Sea region, Europe (Bartonian, Middle to Late Eocene) (paratype).
Castes
Nomenclature
The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.
- †electrina. Myrmica electrina Radchenko, 2023: 639, fig. 3C-E, tables 1, 2 (w.) UKRAINE (Rovno Amber, Eocene), POLAND (Baltic Amber, Eocene).
Type Material
- Holotype worker, complete specimen, Rovno amber, No. K-7581 (SIZK).
- Paratype worker, complete specimen, Baltic amber, No. JDC 5627 (CJDL).
Type locality: Ukraine, Rivne Prov., Rovno amber; Poland, Baltic amber; both late Eocene, Priabonian age, 37.8–33.9 Ma.