Aclistomycter is an extinct genus of oreodont. It lived during the early Chadronian subepoch 37.2—33.9 mya, existing for approximately 3 million years.[1] from the Chambers Tuff Formation near Adobe Springs in Presidio County, Texas.
| Aclistomycter Temporal range: Late Eocene
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Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Order: | Artiodactyla |
| Family: | †Merycoidodontidae |
| Subfamily: | †Aclistomycterinae Lander 1998 |
| Genus: | †Aclistomycter Wilson 1971 |
| Species | |
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Aclistomycter was a very small herbivorous artiodactyl with a short face, small, but tusk-like canine teeth.[citation needed]
Diagnosis
editThe type specimen consists of a skull and jaws.
Generic characters assigned by Wilson (1970):
- Medium small merycoidodontid with very large and deep, probably perforated, antorbital fossae.
- Brachycephalic.
- Posterior part of skull extended.
- Molar teeth with thick enamel and deep fossettes.
- Posterior base of zygomatic processes wide, making the skull broad posteriorly.
- Bullae thought to be inflated (though the bullae are not exposed in the figures of the type specimen illustrated by Wilson).