Ancient Earth Trading Co. - (866) 327-8401

Ground Beetle Platynus senex from Green River Fm. Colorado

More Views

Ground Beetle Platynus senex from Green River Fm. Colorado

Availability: Out of stock

Platynus senex (Ground Beetle)

Age : Eocene (48 Ma)
Formation : Parachute Creek Member / Green River Formation
Locality : Hawes Quarry, Rio Blanco, Colorado

Beetle : 0.6 x 0.4 cm

This insect is a type of beetle. It is of the beetle order called Coleoptera. It has been dated to about 48 million years ago. There are members of the Carabidae family living today. This family of beetles has 151 genera and around 2500 species.

Typical for the ancient beetle suborder Adephaga to which they belong, they have paired pygidial glands in the lower back of the abdomen. These are well developed in ground beetles, and their modern relatives produce noxious or even caustic secretions used to deter would-be predators, it is theorized these beetles, 48 million years ago, also carried this trait.


The Green River Formation is famous worldwide for its fossil fish and other associated fauna (reptiles, birds, mammals, & plants). The Green River Fm. also provides us a rare snapshot glimpse into life 49 million years ago.

The preservation of the fossil insects in the Hawes Quarry are just spectacular, some good enough to allow not only identification to family and subfamily, but will sometimes show color patterns, wing venation, and sex-related characters.

This fossil specimen was collected by William Hawes, from his quarry, the Hawes Quarry, in Rio Blanco County, Colorado. The Hawes Quarry has produced some of the most amazingly beautiful insect fossils from the Green River Fm. and these represent the hand selected, choice picks, from Hawes years of collecting in the mountains of Colorado.

Specimen will come with an identification card.

Scientific Classification :
Kingdom:    Animalia
Phylum:    Arthropoda
Class:    Insecta
Order:    Coleoptera
Suborder:    Adephaga
Family:    Carabidae
Genus:    Platynus (Bonelli, 1810)