Deltadromeus agilis

Overview

Deltadromeus agilis was a theropod dinosaur known for long, slender limbs and a large shoulder region. Its partial skeleton provides material for comparing the front of the body, hind limbs, and tail. We can look beyond the first impression of long legs to examine several regions together.^[1]

Key facts

Pay attention not only to the hind limbs but also to the large shoulder blade and relatively well-developed forelimbs. The 1996 description considered these regions together. They are features of the front of the body easily overlooked when only slender hind limbs are emphasized.^[1]

Time and place

This Cretaceous dinosaur was described in a 1996 study of carnivorous dinosaurs from the Sahara. The Cretaceous spans approximately 140–66 million years ago. Partial postcranial and tail material was used to compare different dinosaur body plans of the time.^[1][2]

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

Size, form and skeleton

Long, slender hind limbs, a large shoulder region, and relatively well-developed forelimbs are described. Tail bones also help connect our understanding of the rear of the body.^[1]

The Natural History Museum in London gives a body length of about 8.1 m for the genus Deltadromeus.^[3]

Habitat and reproduction

Long legs raise questions about movement. The skeleton allows the shoulder, forelimbs, hind limbs, and tail to be compared together. Examining how the whole body connects, rather than relying on the impression of one limb region, gives a fuller view of dinosaur form.^[1]

Fossil discovery

The partial skeleton SGM-Din2 was important material in the 1996 study. The paper’s whole-body reconstruction distinguishes preserved bones from regions reconstructed to connect them. Its illustration of a Carcharodontosaurus skull represents a different dinosaur.^[1]

References

1. Sereno et al. (1996) — Carnivorous dinosaurs of the Sahara and Deltadromeus
2. International Commission on Stratigraphy (2024) — Geological time chart
3. Natural History Museum, London — Deltadromeus
4. PLOS ONE — The head and growth of Stegoceras

Research questions

When several dinosaurs appear in one paper, which bones belong to which animal? Following names and specimen numbers distinguishes the subject of a skull illustration from that of a postcranial skeleton. Correctly connecting evidence from different fossils is also part of dinosaur research.^[1]

Observation

Start at the shoulder and forelimbs, then move your gaze to the long, slender hind limbs and tail. Comparing the front and rear of the body reveals the features conveyed by the partial skeleton.^[1]