Longitud hocico-cola 65 mm

where the sail would act as a surface to absorb or dissipate heat

It is thought to have weighed between 200 and 250 kilograms

as it features unique characteristics compared to other known thyreophorans

probably feeding on small vertebrates

Stethacanthus altonensis Dino and Dog Longitud hocico-cola 65 mmStethacanthus altonensis is an extinct cartilaginous fish from the Early Carboniferous (late Mississippian, approx. 330320 million years ago), belonging to the Symmoriida group within Chondrichthyes, a primitive lineage closely related to early sharks and chimaeras. It is the type species of the genus Stethacanthus, a taxon particularly renowned for one of the strangest anatomical structures known among Paleozoic vertebrates: a modified anterior