Stenopelix

Stenopelix (meaning "narrow pelvis") is a genus of early plant-eating dinosaurs that lived during the Early Cretaceous period, around 140 million years ago, in what is now Germany.

This dinosaur is part of a group called ceratopsians, known for special skull features. However, the fossil of Stenopelix does not include a skull. Scientists named this dinosaur because of unique traits in its hips, which showed it was a new kind of dinosaur.

Studying Stenopelix helps us learn about the early evolution of ceratopsian dinosaurs and life in Europe long ago, even though we only have a partial skeleton.

Discovery and species

In 1855, a fossil of a small dinosaur was found in a sandstone quarry near Bückeburg on the Harrl. Many of its bones were broken, so only outlines were left. These outlines have been used to make copies for study.

In 1857, a scientist named Christian Erich Hermann von Meyer named this dinosaur Stenopelix valdensis. The name means "narrow pelvis" in Greek. The fossil, called GZG 741/2, has most of the dinosaur's body but not its head or neck. It is kept at the Georg-August-Universität Göttingen.

Description

Stenopelix was a small plant-eating dinosaur that lived about 140 million years ago. It grew to be about 1.4 meters (4.6 feet) long and weighed around 10 kilograms (22 pounds). Scientists found fossils of this dinosaur, but they did not find its head. One special feature of Stenopelix is the shape of its hips. The bones in its hips have unique details.

Classification

The classification of Stenopelix is not fully agreed upon because its skull was not found. Before the 1960s, it was often placed in a group called ornithopods. In 1974, a scientist suggested it might be one of the oldest known pachycephalosaurs, but this was later shown to be incorrect.

More recent studies suggest Stenopelix might be a type of early ceratopsian. Some scientists still think it belongs to a group called Marginocephalia, while others see it as part of the chaoyangsaurids, a group that includes several early ceratopsians like Yinlong.