---
title: Torosaurus
description: "Dalle origini del pianeta alle grandi estinzioni. Un viaggio attraverso 4 miliardi di anni di storia, dalle prime forme di vita dell'Adeano ai giganti del Mesozoico e oltre."
author: Angelo Denitto
url: https://noidinosauri.it/en/dinosaurs/ornithischians/marginocephalians/torosaurus
---

![](https://noidinosauri.it/images/encyclopedia/dinosaurs/torosaurus/torosaurus-in-floodplain-late-cretaceous.webp)

![](https://noidinosauri.it/images/encyclopedia/dinosaurs/torosaurus/torosaurus-in-floodplain-late-cretaceous.webp)

## Curiosity - Did you know?

Between 2010 and 2011, paleontologists John Scannella and Jack Horner published a polarizing hypothesis. They proposed that *Torosaurus* never existed as a distinct genus. They argued it merely represented the advanced elderly phase of *Triceratops*. According to this theory, as a *Triceratops* aged, its solid frill thinned and eventually opened to form the characteristic fenestrae.



Subsequent osteological research dismantled this theory. Paleontologists like Nicholas Longrich and Andrew Farke — with data verified up to 2024 — proved the existence of immature Torosaurus specimens. Furthermore, they identified specific morphological differences at the base of the skull that are entirely incompatible with the maturation hypothesis. Torosaurus and Triceratops are close cousins. Distinct, separate genera. Torosaurus retains its taxonomic identity.

IMPORTANT - Some statements regarding behavior, coloration, and sensory abilities reflect ongoing scientific hypotheses, not established certainties.