Cebochoerus helveticus

Overview

Cebochoerus helveticus was a fossil mammal of Late Eocene Europe. Small molars from Sossís, Spain, are among its notable records. A few fragments of teeth connect to long-standing taxonomic discussions and the story of an ancient locality.^[1][2]

Key facts

The same fossil teeth have received different names from different researchers. The Sossís material was classified under several genera and species before being associated with helveticus. New comparative material can change the names assigned to old collections.^[1]

Time and place

The material dates to the early part of the late Eocene, around 38 million years ago. It came from Sossís in the Pyrenean foreland basin of present-day Lleida Province, Spain. The authors compared the locality’s artiodactyls with faunas of the MP17a interval.^[1]

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

Size, form and skeleton

The Sossís material includes a right upper second molar and fragments of the rear portions of lower molars. Body comparisons at genus level describe a short-legged, pig-like form. This animal invites consideration of small dental differences alongside genus-level body comparisons.^[1][2]

Cebochoerus helveticus specimen IPS 5889 from Sossís, Spain, is an upper second molar measuring 8.2 mm long and 9 mm wide. Rounded cusps gather on a chewing surface less than 1 cm across, allowing the food-crushing structures of a tiny tooth to be examined.^[3]

Habitat and reproduction

Sossís is a Late Eocene locality known for several terrestrial vertebrates. The combination of associated artiodactyls is used to compare regional faunas of the time. Cebochoerus teeth, placed alongside material from other localities, also contribute to studies of ancient terrestrial life.^[1]

Fossil discovery

Sossís has been studied as a fossil locality since the 1940s. Three teeth of this species were separately cataloged in a 2006 paper and recorded at that time as holdings of the paleontological museum in Sabadell. Long-term research at one locality has revisited the names and significance of small pieces of evidence.^[1]

References

1. Cuesta, Checa & Casanovas2006 — Artiodactyls from Sossís
2. Body comparison of fossil mammals — Cebochoerus
3. Cuesta Ruíz-Colmenares, Checa Soler & Casanovas Cladellas (2006), Artiodáctilos del yacimiento de Sossís (Eoceno superior, Cuenca Prepirenaica, Península Ibérica)
4. Gazin (1953) — A study of tillodont mammals

Research questions

What must be compared to identify a species from part of a tooth? Researchers consider its position in the upper or lower dentition, size, and cusp shape together. The history of different names for the Sossís specimens reveals the process of interpreting small differences.^[1]

Observation

Imagine the molars’ positions in the jaws, then examine differences between upper and lower molars. Alternating between the entire short-legged body and tiny teeth conveys the different scales involved in paleontological research.^[1][2]