Stegodibelodon schneideri

Overview

Stegodibelodon schneideri is an elephantid known from lower jaws, teeth, and a small amount of body-skeleton material. The absence of lower tusks is a described feature. Small structures of the jaw offer a way to recognize a large proboscidean.^[1][2]

Key facts

A comprehensive description states that the lower jaw lacks tusks. Which jaw bears tusks is one clue for comparing fossil proboscideans.^[2]

Time and place

The recorded fossil-bearing strata are summarized as material spanning the Miocene and Pliocene, roughly 12–2.6 million years ago. Institutional specimen lists and proboscidean descriptions convey this animal’s name and form.^[3]

The time range describes source context, not the complete duration of this species.

Size, form and skeleton

The material is described as lower jaws, teeth, and a small number of body bones. The absence of lower tusks and the jaw symphysis are features for comparison. Information comes from several parts of the preserved bones rather than the overall impression of the large body.^[2]

A comparative table summarizing Stegodibelodon schneideri material from Koulanga, Chad, records an upper third molar length of 300mm. A single molar reaching 30cm invites us to imagine the large chewing surface that processed food inside its mouth.^[4]

Habitat and reproduction

Which parts of fossil elephantid jaws differed? The region where the jaw meets at the front, tooth positions, and the presence or absence of lower tusks can be compared. These offer clues to different constructions within the same group.^[2]

Fossil discovery

The museum catalogue records MNHN.F.MCA2 as the type specimen and links it to the bibliography of the 1972 description. A separate comprehensive description reports information on jaws, teeth, and body bones. This is a case of reading the reference for a name together with descriptions of form.^[1][2]

References

1. National Museum of Natural History, Paris — Stegodibelodon specimen catalogue
2. Comprehensive description of proboscideans — Jaws and teeth of Stegodibelodon
3. Paleobiology Database — Age of fossil-bearing strata of Stegodibelodon
4. Sanders et al. (2021) — Morphological description and identification of an extraordinary new elephant cranium from the early Pliocene of Ileret, Kenya
5. Huttunen·Göhlich (2002) — The Prodeinotherium skeleton from Unterzolling

Research questions

When a jaw symphysis is described as long or short, what is it being compared with? The reference region and related animals must be considered together. This research reads the proportions of one bone among several sources of evidence.^[2]

Observation

Move your gaze from the front symphysis of the lower jaw to the tooth-bearing region. Keeping the described absence of lower tusks in mind helps you examine small diagnostic features of a large proboscidean.^[2]