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Myrmica dictyosa
| †Myrmica dictyosa Temporal range: 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. dictyosa |
| Binomial name | |
| †Myrmica dictyosa Radchenko, 2023 | |
Photo Gallery
Radchenko (2023), Figure 4. Myrmica dictyosa, worker, holotype: (A) body, dorsal view; (B) scape; Myrmica damzeni, worker, holotype: (C) body, lateral view; Myrmica saxonica, worker, holotype: (D) body, dorsal view; (E) head, dorso-lateral view; (F) waist and propodeum, dorsolateral view. Scale bars: A, C, D – 1 mm, B, E, F – 0.5 mm.
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Identification
Meso- and metatibiae without spur; head dorsum and mesosoma with very coarse reticulation, only lower part of frons with short coarse longitudinal rugae; upper lateroventral corners of head somewhat pointed; eyes located distinctly in front of midlength of sides of head; scape gradually, but quite strongly curved at base, without any angle, lobe or carina; mesosoma long and narrow; propodeal spines directed mainly backward (seen in profile) and strongly divergent (seen from above).
For differences from Myrmica longispinosa, Myrmica rudis, Myrmica intermedia, Myrmica eocenica and Myrmica electrina see those species.
Myrmica dictyosa well distinguished from Myrmica damzeni and Myrmica saxonica by the entirely reticulated mesosoma. In addition, M. saxonica has pectinate spurs on the metatibia, not pointed upper lateroventral corners of the head, and shorter propodeal spines that are strongly widened at the base, massive and somewhat curved inwards. The scape in M. damzeni is less strongly curved at the base. The eyes of both latter species are located approximately at the midlength of the sides of the head, while in M. dictyosa they are located in front of the the midlength of the sides of the head.
Keys including this Species
Distribution
This taxon was described from Baltic amber, Baltic Sea region, Europe (Bartonian, Middle to Late Eocene).
Castes
Nomenclature
The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.
- †dictyosa. Myrmica damzeni Radchenko, 2023: 641, fig. 4C, tables 1, 2 (w.) POLAND (Baltic Amber, Eocene).
Type Material
- Holotype worker, complete specimen, Baltic amber, No. 472, WK 79 (MAGU).
Type locality: Poland, Baltic amber, late Eocene, Priabonian age, 37.8–33.9 Ma.