Dorcatherium

Dorcatherium was a Miocene genus of tragulids, the small ruminants commonly called chevrotains or mouse-deer. Fossils assigned to the genus occur in Europe, Africa and Asia. These animals had slender limbs and no bony antlers. In several species, males had enlarged upper canines, a feature more easily mistaken for tusks than for the headgear of a true deer.

Most specimens are jaws and teeth, so species are often distinguished by dental size and cusp pattern. Those characters vary with wear and can overlap between named forms. A rich Early Miocene sample from Els Casots, Spain, helps show variation within D. crassum; it also illustrates why one isolated crown cannot settle a species diagnosis. The genus is included in the ancient mammal catalogue.

Quick facts

Recognising a tragulid tooth row

The lower molars of tragulids have a distinctive M-shaped arrangement of crests. Their crowns combine rounded cusps with ridges that guide food through the jaw. This pattern helps identify the family; smaller details of the premolars and molars, along with tooth dimensions, are used to separate species of Dorcatherium.

Wear can conceal or exaggerate those details. A cusp that is crisp in a juvenile tooth may be flattened in an adult. Measurements and comparisons therefore need matching tooth positions and wear stages. Small samples can make size differences look more taxonomically decisive than they are.

Researchers describing D. crassum from the Els Casots locality in Catalonia had an unusually informative collection: permanent cheek teeth, lower deciduous premolars and several juvenile jaws. The site dates to about 16.5–16.3 million years ago (MN4). The sample’s size and occlusal morphology fit D. crassum from its French type locality, Sansan, while also exposing natural variation within the species.

A skull without deer antlers

Tragulids belong near the base of the living ruminant radiation, but they are not miniature deer. Dorcatherium had no bony antlers or horns. Males of several tragulid species instead carried enlarged upper canines that projected from the mouth.

Such canines may have served in display or competition, as they do in some living chevrotains. The fossil teeth do not preserve a fight or a courtship ritual, and a separated jaw is not always enough to identify sex. The inference should remain about a likely function, not a witnessed behaviour.

Thin limb bones and small body size are compatible with movement through dense vegetation and across soft forest ground. Modern chevrotains can swim or dive, but those habits cannot automatically be assigned to every fossil species. The skeleton and teeth, not a living relative’s whole behavioural repertoire, set the limits of reconstruction.

What the feeding evidence can support

Tragulids are plant-eating ruminants. Microscopic wear on fossil teeth provides a finer view than a broad herbivore label. Studies of early Miocene East African species have found differences among samples consistent with diets weighted toward leaves, fruit or mixed vegetation. Those differences show why it is risky to give every species in a widespread genus one uniform menu.

Dental microwear records the contact of food particles with enamel, including the effects of abrasive grit. It reflects a period of use rather than an entire lifetime, and the signal depends on local soil and vegetation. It can test feeding hypotheses, but rarely identify an exact plant species.

The Els Casots fossils also preserve juveniles. Milk teeth add information about dental development that an adult-only collection would miss. Comparisons with other European forms, including D. naui, show overlap in some measurements. Researchers must combine multiple tooth features, stratigraphic age and associated skeletal material to avoid extending a species name too freely.

A widespread genus with a changing taxonomy

Fossil tragulids once ranged more widely than their living relatives, which are now restricted to parts of Africa and Southeast Asia. Many European and African Miocene species have historically been placed in Dorcatherium. The genus has consequently accumulated names and referrals that do not all carry equal certainty.

Some skulls are fragmentary, some species were founded on limited dental differences, and historical locality ages have changed with improved stratigraphy. A specimen referred to Dorcatherium does not necessarily extend every other species or establish a direct ancestor-descendant sequence. New anatomical samples can shift the boundaries again.

The secure picture is of small, hornless Miocene tragulids distributed across several continents. Their molars reveal how plant food was processed; male canines and limb proportions add cautious clues about anatomy. Fine-scale behaviour and the precise relationships among all named species remain less certain.