Su tronco era ancho y profundo

while the specific name lenticarpus derives from Latin for “flexible wrist”

It is thought to have weighed between 200 and 250 kilograms

Belonging to the family Ceratopsidae

probably feeding on small vertebrates

Stethacanthus altonensis Dino and Dog Su tronco era ancho yStethacanthus 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