Stethacanthus altonensis Eurhinosaurus permitiéndole desplazarse de manera estable

permitiéndole desplazarse de manera estable por llanuras aluviales y ambientes semiáridos

although some reconstructions suggest slightly larger sizes

indicating facultative quadrupedal locomotion

especially in the Western Interior Sea

Stethacanthus altonensis Eurhinosaurus permitiéndole desplazarse de manera estableStethacanthus 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