Glyptodon clavipes

Overview

Glyptodon clavipes was an extinct cingulate mammal with large, dome-shaped armor. Its name and reference fossils were clarified through old discoveries and reexaminations. An individual foot, as well as the huge armor, carries an important naming story.^[3][1]

Key facts

A single complete foot can serve as the reference for a species name. A 1955 reassessment selected material from Villanueva among three old specimens as the name-bearing reference. A large animal’s history can be connected to small foot bones.^[3]

Time and place

It is known from the Pleistocene of the present-day Argentine Pampas. The three specimens in the early description came from layers in Buenos Aires Province. The Pleistocene spans approximately 2.6 million to 12,000 years ago.^[3][2]

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

Size, form and skeleton

This group is known for large, dome-shaped bony armor covering the back. Historical specimens of Glyptodon clavipes include discussions of foot and carapace material. Examining which regions survive allows comparisons of large cingulate anatomy.^[3][1]

A Royal College of Surgeons specimen introduced as Glyptodon clavipes in nineteenth-century research had a carapace about 1.70 m long.^[9]

Habitat and reproduction

How did a hard-armored animal support its body on land? Questions begin by comparing foot bones and armor together. Placing the feet and bodies of other large cingulates alongside them allows differences in life to be explored.^[3][1]

Fossil discovery

Owen proposed the genus name from a single tooth in 1838 and treated clavipes as its first species the following year. Later research also documented how an old reconstruction incorporated another animal’s tail. Reexamining specimens became an important process for understanding names and bodies.^[3]

References

1. American Museum of Natural History — Bony armor of glyptodonts
2. International Commission on Stratigraphy (2024) — Geological time chart
3. 2018 study — Comparison and history of descriptions of Glyptodon and Glyptotherium
4. 2018 study — Comparison and history of descriptions of Glyptodon and Glyptotherium
5. International Commission on Stratigraphy (2024) — Geological time chart
6. American Museum of Natural History — Bony armor of glyptodonts
7. Vizcaíno et al.2011 — Limb proportions and function in glyptodonts
8. Blanco et al.2009 — The center of percussion of biological hammers
9. Royal Society — Description of a new Glyptodon specimen

Research questions

How can separate feet, armor, and teeth be identified as material from the same animal? Old collection records and diagnostic specimen features are compared together. A 2018 comparative study connected descriptive history with distinctions between Glyptodon and related cingulates.^[3]

Observation

Move your gaze from the large dome-like carapace to the feet beneath the body. Remember that the overall armor outline and supporting bones convey different clues.^[3][1]