1 Talk Orthacanthidae Edit Fossil Record Orthacanthidae is an extinct family of sharks belonging to the order Xenacanthiformes. This article is a stub. You can help Fossil Wiki by expanding it. Read more Carcharodon carcharias Squalicorax Scapanorhynchus ("Spade Snout") is an extinct genus of shark from the Cretaceous era. Their... Scapanorhynchus Related Categories Categories: Article stubs | Sharks Add category