Proceratium eocenicum

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Proceratium eocenicum
Temporal range:
Middle Eocene
P. eocenicum paratype male
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Genus: Proceratium
Species:
†P. eocenicum
Binomial name
†Proceratium eocenicum
Dlussky, 2009

Proceratium eocenicum is an

formicid in the ant subfamily Proceratiinae
known from fossils found in the Baltic region.

History and classification

P. eocenicum is known from two fossil specimens of adult males. The fossils were discovered preserved as

Quercus and Pinus species, while the lower sections of the forests had paratropical plant elements, such as palms.[2]

At the time of description, the

Cerapachyinae, and Pseudomyrmecinae in European Eocene ambers. In the type description, Dlussky named the species P. eocenicum, with the specific epithet derived from "Eocene" as a reference to the age of the amber.[1]

As of 2015, six species of

diatomite deposits of the Bol’shaya Svetlovodnaya site on the Pacific coast of Russia. P. eocenicum is of similar age to P. petrosum, the only other species with a described fossil male.[4]

Description

P. eocenicum males range between 2.2–2.7 mm (0.087–0.106 in) in adult length, with a shiny exoskeleton. The surface of the exoskeleton has hairs, both upright and laying flat, and pitting across the whole body. The hairs are short, being shorter than the distance between each hair, while the upright hair is confined to areas of the legs, and around the tip of the gaster. The pits are not well developed on the head or the scutum, but become much more developed on the upper surface of the mesopleura and propodeum, spaced slightly closer than the diameter of each pit. Fore-wings on the males range between 1.7–2.1 mm (0.067–0.083 in) in length and have a distinct fringe of hair along the back edge of the wing.[1]

References

  1. ^
    S2CID 84170960
    .
  2. ^
    ISBN 978-0-9558636-4-6
    .
  3. ^ Henderickx, H.; Tafforeau, P.; Soriano, C (2012). "Phase-contrast synchrotron microtomography reveals the morphology of a partially visible new Pseudogarypus in Baltic amber (Pseudoscorpiones: Pseudogarypidae)". Palaeontologia Electronica. 15 (2, 17A, 11p): 1–11.
  4. doi:10.23885/1814-3326-2015-11-1-131-152
    .

External links
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