What is Turiasauria?

All eusauropods more closely related to Turiasaurus riodevensis than to Saltasaurus loricatus. Turiasauria emerged in the Middle Jurassic, with possible roots reaching back into the Early Jurassic, as a lineage poised just outside the neosauropod rise yet capable of achieving monumental scale on its own terms. Recent work by Milan and Mateus (2023) described an Early Jurassic-aged tooth from Denmark bearing the characteristic crown of Turiasauria, potentially pushing their origins back some 17 million years and implying a long, cryptic early history before their skeletal record became visible. They are recognised across multiple continents: in Europe with giants such as Turiasaurus, Losillasaurus, and Zby; in North America with Moabosaurus and Mierasaurus; and in Africa with Narindasaurus from Madagascar; supplemented by a growing scatter of turiasaur-like remnants from India, England, and beyond.

Turiasaurians scoffed at the extensive air-space invasion that lightened the skeletons of the huge neosauropods, following instead an alternative blueprint for gigantism: huge flaring scapulae, vertebrae built as dense structural supports rather than hollowed beams, and extremely robust limbs carrying bodies that approached the upper limits of eusauropod mass. Their skulls retained archaic proportions—large and boxy, and equipped with unusually broad, heart-shaped teeth. These are animals shaped by density over delicacy, their bodies engineered for structural solidity.

Turiasauria persisted into the Early Cretaceous, long after many Jurassic lineages vanished, surviving as relict giants in the forests and floodplains of Laurasia and parts of Gondwana. Although their spread across these supercontinents is notable, turiasaurs never achieved the global spread of neosauropods, but even so, they showed that immense body size was a destination that sauropods could reach via different anatomical routes.

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