Gerontoformica sternorhabda

AntWiki: The Ants --- Online
Gerontoformica sternorhabda
Temporal range: Early Cenomanian, Late Cretaceous Burmese amber, Kachin State, Myanmar
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Sphecomyrminae
Tribe: Sphecomyrmini
Genus: Gerontoformica
Species group: pilosus
Species: G. sternorhabda
Binomial name
Gerontoformica sternorhabda
Boudinot, Richter, Katzke, Chaul, Keller, Economo, Beutel & Yamamoto, 2022



This taxon was described from Burmese amber, Kachin State, Myanmar (Early Cenomanian, Late Cretaceous).


GerontoformicaEconomo-header (  X-ray micro-CT scan 3D model of Gerontoformica sternorhabda (worker) prepared by the Economo lab at OIST.

This is a 3D model of a fossilized ant first presented in the scientific article ‘Evidence for the evolution of eusociality in stem ants and a systematic revision of †Gerontoformica (Hymenoptera: Formicidae)’ published in the Zoological Journal of the Linnean Society by Brendon E. Boudinot and others. The ant was identified and described as Gerontoformica sternorhabda from a piece of Cretaceous amber about 99 million years old (collection ID: AMNH Bu-SY23; specimen ID: CASENT0741233). To create the 3D model, the amber was micro-CT scanned. Adrian Richter created the model using segmentation techniques, Shuhei Yamamoto took the photo, and Julian Katzke scanned it and uploaded it to Sketchfab. See on Sketchfab. See list of 3D images.


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

  • sternorhabda. †Gerontoformica sternorhabda Boudinot, Richter, Katzke, et al. 2022: 10, figs. 1C, D, 2C, F, I, L, 4-6, 7E, 11 (1-2), 12 (2-1, 2-3, 2-4), 13 (3’-1) (q.) BURMESE AMBER (Myanmar, Cretaceous).