Dalpiazia is a prehistoric genus of saw fish whose fossils are found in rocks dating from the Maastrichtian

Maastrichtian

The Maastrichtian is, in the ICS' geologic timescale, the latest age or upper stage of the Late Cretaceous epoch or Upper Cretaceous series, the Cretaceous period or system, and of the Mesozoic era or erathem. It spanned from 70.6 ± 0.6 Ma to 65.5 ± 0.3 Ma...

 stage in Morocco

Morocco

Morocco , officially the Kingdom of Morocco , is a country located in North Africa. It has a population of more than 32 million and an area of 710,850 km², and also primarily administers the disputed region of the Western Sahara...

. It was named in honor of Ernst Stromer

Ernst Stromer

Ernst Freiherr Stromer von Reichenbach was a German paleontologist.He described the following Cretaceous dinosaurs from Egypt: Aegyptosaurus, Bahariasaurus, Carcharodontosaurus, and the largest known theropod, Spinosaurus aegyptiacus...

.

Classification

The validity of Dalpiazia has been questioned by Arambourg, who felt it was synonymous with Ischyrhiza, which in turn is a subgenus

Subgenus

In biology, a subgenus is a taxonomic rank directly below genus.In zoology, a subgeneric name can be used independently or included in a species name, in parentheses, placed between the generic name and the specific epithet: e.g. the Tiger Cowry of the Indo-Pacific, Cypraea tigris Linnaeus, which...

 of Onchosaurus. If Arambourg is correct, then Dalpiazia sp. would be properly notated as Onchosaurus (Ischyrhiza) sp.

See also

• Flora and fauna of the Maastrichtian stage
  Flora and fauna of the Maastrichtian stage
  This is an incomplete list that briefly describes vertebrates that were extant during the Maastrichtian, a stage of the Late Cretaceous Period which extended from 70.6 to 65.5 million years before present...
  
  
• List of prehistoric cartilaginous fish (Chondrichthyes)