Stupendemys geographica

Overview

Stupendemys geographica is a fossil side-necked turtle known from part of the head together with the carapace, plastron, and limbs. Associated material from an individual labelled VPPLT1337 reveals several body regions. Connections between the head and shell can be examined together.^[1]

Key facts

VPPLT1337 includes descriptions of hind limbs, the shoulder girdle, and neck vertebrae in addition to an articulated carapace and plastron. Different regions in the same associated material reveal the body’s construction.^[1]

Time and place

The recorded fossil-bearing strata are summarized as Miocene and Pliocene material roughly 14–2.6 million years old. Associated head, shell, and limb material forms the basis for exploring this fossil turtle’s body.^[3]

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

Size, form and skeleton

The material includes a partial skull, articulated carapace and plastron, hind limbs, shoulder girdle, and neck vertebrae. It allows examination of several body regions together rather than just the large shell.^[1]

The carapace alone conveys the enormous size of Stupendemys. A 2020 study reported a carapace reaching 2.4m in length. This figure is the length of the carapace, not the total body length including the head and tail.^[4]

Habitat and reproduction

How does the large shell connect to the head and limbs? Looking at the associated neck vertebrae, shoulder girdle, and hind limbs together allows comparison of each body region. Stupendemys offers a case of exploring connections in one source of evidence preserving several parts.^[1]

Fossil discovery

Wood described Stupendemys in 1976. Later anatomical and growth research addressed head, shell, and limb material from the newly assigned VPPLT1337. New fossils added information about the body after the animal was first named.^[2][1]

References

1. Follow-up study on the anatomy and growth of Stupendemys
2. Wood (1976) — Original description of Stupendemys
3. Paleobiology Database — Age of fossil-bearing strata of Stupendemys
4. Cadena et al. (2020) — Anatomy and paleobiology of the giant side-necked turtle Stupendemys
5. Anderson (1925) — Morphology and occurrences of Meiolania

Research questions

What more can be learned than when only the carapace and plastron remain? When the head, neck, shoulder, and hind limbs are included in the same associated material, structures around the shell can be compared together. The large outline and the connecting regions convey different clues.^[1]

Observation

Move your gaze from the head and neck to the carapace and plastron. Examining the shoulder girdle and hind limbs together helps you explore the connections between the large shell and surrounding body.^[1]