Chronomyrmex

†Chronomyrmex Temporal range: Campanian, Late Cretaceous K Pa Eo Ol Mi Pl Foremost Formation amber, Alberta, Canada
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Hymenoptera
Family:	Formicidae
Subfamily:	Dolichoderinae
Tribe:	Leptomyrmecini
Genus:	†Chronomyrmex McKellar, Glasier & Engel, 2013
Type species
Chronomyrmex medicinehatensis
Diversity
1 fossil species (Species Checklist)

Chronomyrmex and Eotapinoma, from Canadian Campanian amber (79-78 Ma), are the only dolichoderines known from the Cretaceous. They were originally placed in the Leptomyrmecini and Tapinomini, respectively, but are now treated as stem-group dolichoderines (Dlussky, 1999; McKellar et al., 2013; Boudinot et al., 2016; Perrichot et al., 2019).

Distribution

This taxon is known from Foremost Formation amber, Alberta, Canada (Campanian, Late Cretaceous).

Nomenclature

The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.

• †CHRONOMYRMEX [Dolichoderinae: Leptomyrmecini]
  • †Chronomyrmex McKellar, Glasier & Engel, 2013: 586. Type-species: †Chronomyrmex medicinehatensis, by original designation.

Taxonomic history

• †Chronomyrmex in Dolichoderinae, Leptomyrmecini: McKellar, et al. 2013a: 586.
• †Chronomyrmex as stem-taxon to Dolichoderinae: Borysenko, 2017: 19.

References

• Barden, P. 2017. Fossil ants (Hymenoptera: Formicidae): ancient diversity and the rise of modern lineages. Myrmecological News 24: 1-30.
• Barden, P., Engel, M.S. 2020. Fossil social insects. Encyclopedia of Social Insects, Springer, Cham (doi:10.1007/978-3-319-90306-4_45-1).
• Borysenko, L.H. 2017. Description of a new genus of primitive ants from Canadian amber, with the study of relationships between stem- and crown-group ants (Hymenoptera: Formicidae). Insecta Mundi 570: 1–57.
• Boudinot, B.E., Perrichot, V., Chaul, J.C.M. 2020. †Camelosphecia gen. nov., lost ant-wasp intermediates from the mid-Cretaceous (Hymenoptera, Formicoidea). ZooKeys 1005, 21–55 (doi:10.3897/zookeys.1005.57629).
• Cantone, S., Von Zuben, C.J. 2019. The hindwings of ants: A phylogenetic analysis. Psyche: A Journal of Entomology 2019, 1–11 (doi:10.1155/2019/7929717).
• McKellar, R. C.; Glasier, J. R. N.; Engel, M. S. 2013. New ants (Hymenoptera: Formicidae: Dolichoderinae) from Canadian Late Cretaceous amber. Bulletin of Geosciences 88:583-594. [2013-07-03]
• Perrichot, V., Salas-Gismondi, R., Antoine, P.-O. 2019. The ant genus Tapinoma Förster (Formicidae: Dolichoderinae) in Miocene amber of Peru. Palaeoentomology 2(6): 585-590 (doi:10.11646/palaeoentomology.2.6.8).