Well Known Member
"The Shovelnose Shark is also known as the Guitarfish, or Shovelnose Guitarfish. It is a bottom dwelling shark that has a very flattened appearance to its body. The head typically comes to a point at the snout".
It looks like a Shark subspecies. The Cali fish and game has it listed under Sharks, and it was always called that locally.....http://www.dfg.ca.gov/marine/mspcont5.asp
Meanwhile, back at the end of the Triassic, at about the same time as Palaeospinax was swimming around the coastline of the super continent Pangaea, another group of sharks were adapting well to the bottom terrain of the shallow slopes. By the upper Jurassic Period the first guitarfishes were grubbing around for food and blending into the bottom sediments. These rays were a little more primitive than those of today. The main differences being a more shark like skeletal structure and the presence of fin spines. It has been suggested that all modern rays were derived from primitive guitarfishes but it is unclear exactly where the families are linked. The most recent addition to the batoid tree are the stingrays which showed up a mere 60 million years ago yet they fill the shallows of most tropical and temperate continental waters.