NaturePrehistoric (Pleistocene)Argentinamedium confidence

The Neoesclerocalyptus specimen weighed around 400 kilograms, stood about 90 centimeters tall, and measured 1.30 meters in total length including skull, shell, and tail tube.

Notes on verification

Figures are consistent across many outlets but all trace back to a single CONICET press release rather than independently verified measurements. Independent scientific literature on the genus supports a similar mass range, lending plausibility but not full independent corroboration of this specific specimen's stats.

Sources