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Extreme armour in the world's oldest ankylosaur Supplementary Material

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Resumen del artículo

Título de Paperzilla
Spiky Dinosaur Shows Off Early Armor: New Ankylosaur Fossil From Morocco!

This supplementary material provides a detailed anatomical description of new fossil material attributed to the early ankylosaur *Spicomellus afer* from the Middle Jurassic of Morocco. The fossil material includes a partial skeleton with unique "T"-shaped dorsal ribs bearing co-ossified dermal spikes, an elaborate cervical half-ring, and other armor elements. Phylogenetic analyses place *Spicomellus* as an early-diverging ankylosaur, suggesting early development of dermal armor.

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A new fossil of an armored dinosaur, *Spicomellus*, was found in Morocco. Its unique spikes and armor show how these dinosaurs evolved defenses early on.

Posibles conflictos de intereses

None identified.

Limitaciones identificadas

Limited fossil material and complex phylogeny
The phylogenetic placement of *Spicomellus* remains somewhat uncertain due to limited fossil material and the complexity of early ankylosaur relationships. Additional fossils could refine its position within Ankylosauria.
Disarticulated skeletal material
The referred material to *Spicomellus* in this paper consists of disarticulated skeletal elements, making it difficult to fully reconstruct the animal's anatomy and to confidently assign all elements to the same individual.
Descriptive study, no statistical tests
Since the paper focuses on the description of new fossil material, there are no experimental or statistical tests conducted. The conclusions are based on comparative anatomy and phylogenetic analysis.

Explicación de la calificación

This paper describes important new fossil material of an early ankylosaur, *Spicomellus afer*, providing insights into the evolution of armor in this group. While limitations exist due to the incomplete and disarticulated nature of the material, the fossil's unique features and phylogenetic placement make it a significant contribution to our understanding of early ankylosaurs.

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Información del archivo

Título original: Extreme armour in the world's oldest ankylosaur Supplementary Material
Subido: 28 ago 2025, 15:50:11
Privacidad: Público