Ischnacanthiformes
Encyclopedia
Ischanacanthiformes is an order of Acanthodii
of spiny sharks. It contains Ischnacanthus
. This order of sharks have large teeth on their Palatoquadrate
.
Acanthodii
Acanthodii is a class of extinct fishes, sharing features with both bony fish and cartilaginous fish. In form they resembled sharks, but their epidermis was covered with tiny rhomboid platelets like the scales of holosteans...
of spiny sharks. It contains Ischnacanthus
Ischnacanthus
Ischnacanthus is an extinct genus of fish in class of Acanthodii. Ischnacanthus lived during the Early Devonian period. The Ischnacanthus have jaws but still have small mosaic scales. They either had very small teeth or none. Fossils were found in Tillywhandland Quarry, Forfar,...
. This order of sharks have large teeth on their Palatoquadrate
Palatoquadrate
In some fishes, the palatoquadrate is the dorsal component of the mandibular arch, the ventral one being Meckel's cartilage....
.