Latest Images

Hesperocyon jaw

Sat, 09 Apr 2016 09:46:21 +0000

Hesperocyon (Early Dog) jaw from the Miocene of Nebraska (Arner Ranch). White River Formation.

Mesohippus jaw

Sat, 13 Feb 2016 04:20:18 +0000

My finished prep of this Mesohippus (three toed horse) jaw. This is from the White River Formation in Nebraska. 31-35Ma.

Xray of Hyaenodon mandibles

Mon, 25 Jan 2016 13:29:57 +0000

The two associated Hyaenodon horridus mandibles from Nebraska puzzled me because they appear to be from an adult but when I removed some matrix i saw gaps for a molar and a tip of a tooth peeping out. I looked into it and it seems that the last molar doesn't reupt until age 3-4 so that is roughly the age of this animal. To verify, I asked a good mate to xray it. Th huge erupting molars are clearly see in the imagine. You can also clearly see the tooth roots below the crowns of the teeth and below the gum line (ie embedded into the bone). You can also clearly make out the mandibular canal (long dark line running ventrally below) the teeth - it's where the major veins, arteries and nerves of the bone run. Great view of millions of years old bone and teeth! Confirms that the teeth are erupting molars and gives me a great idea of the age. Not, quite juvenile, more like subadult.

Prehistoric horse jaw. Mesohippus.

Thu, 10 Dec 2015 07:51:57 +0000

This mesohippus jaw was found near the Hyaenodon. Not sure of species yet but I believe it to be a three toed horse.

Coprolite, possibly carnivore?

Thu, 10 Dec 2015 07:51:26 +0000

A coprolite found in the same area as the Hyaenodon jaw. Looks like something I would find at the park walking the dog so am tentatively thinking its from a carnivore.

Hyaenodon (horridus?) right jaw.

Thu, 10 Dec 2015 07:51:00 +0000

Hyaenodon jaw found in the Nebraska Badlands. I believe it to be horridus but am no expert.

Hyaenodon (horridus?) left jaw.

Thu, 10 Dec 2015 07:50:33 +0000

Hyaenodon jaw found in the Nebraska Badlands. I believe it to be horridus but am no expert.

Hyaenodon (horridus?) left jaw.

Thu, 10 Dec 2015 07:49:53 +0000

Hyaenodon jaw found in the Nebraska Badlands. I believe it to be horridus but am no expert.