Myledaphus

{{Short description|Extinct genus of cartilaginous fishes}}

{{Automatic taxobox

| fossil_range = {{fossil range|93.9|66.0|latest=47.8|Turonian-Maastrichtian|PS=(possible Paleogene occurrences)}}

| image = Myledaphus bipartatus (guitarfish).jpg

| image_caption = Myledaphus bipartitus

| taxon = Myledaphus

| authority = Cope, 1876{{cite journal |last=Cope |first=E.D. |date=1876 |title=Descriptions of some vertebrate remains from the Fort Union beds of Montana |journal=Proceedings of the Academy of Natural Sciences of Philadelphia |volume=28 |pages=248–261 |url=https://www.biodiversitylibrary.org/item/84760#page/278/mode/1up }}

| type_species = †Myledaphus bipartitus

| type_species_authority = Cope, 1876

| subdivision_ranks = Other species

| subdivision = *†Myledaphus tritus
Nessov in Nessov & Udovitschenko, 1986{{cite journal |last1=Nessov |first1=L.A. |last2=Udovitschenko |first2=N.I. |date=1986 |title=Novyye nakhodki ostatkov pozvonochnykh mela i paleogena Sredney Azii [New findings of vertebrate remains from the Cretaceous and Paleogene of Central Asia] |journal=Voprosy Paleontologii |volume=9 |pages=129–136 |url=https://www.researchgate.net/publication/283694665}}

• †Myledaphus pustulosus
  Cook, Newbrey, Brinkman, & Kirkland, 2014{{cite journal |last1=Cook |first1=T.D. |last2=Newbrey |first2=M.G. |last3=Brinkman |first3=D.B. |last4=Kirkland |first4=J.I. |date=2014 |title=Euselachians from the freshwater deposits of the Hell Creek Formation of Montana |journal=Geological Society of America Special Paper |volume=503 |pages=229–246 |doi=10.1130/2014.2503(08)|isbn=978-0-8137-2503-1 }}
• †Myledaphus araucanus
  Otero, 2019{{cite journal |last=Otero |first=R.A. |date=2019 |title=Myledaphus araucanus sp. nov. (Batomorphi, Rajiformes incertae sedis), a new Late Cretaceous ray from the austral Pacific, and first occurrence of the genus in the Southern Hemisphere |journal=Cretaceous Research |volume=100 |pages=82–90 |doi=10.1016/j.cretres.2019.03.025|bibcode=2019CrRes.100...82O }}

}}

Myledaphus is an extinct genus of guitarfish. It currently contains four valid species found in North America (M. bipartitus, M. pustulosus), South America (M. araucanus), and Central Asia (M. tritus). It is confirmed to have lived during the Late Cretaceous, with possible occurrences in the Paleocene and early Eocene.{{cite book |last=Cappetta |first=H. |date=2012 |title=Handbook of Paleoichthyology. Volume 3E. Chondrichthyes. Mesozoic and Cenozoic Elasmobranchii: Teeth. |location=Munich |publisher=Verlag Dr. Friedrich Pfeil |isbn=978-3-89937-148-2}} While the genus is mostly known from teeth, two partial skeletons of M. bipartitus have been found in the Dinosaur Park Formation of Alberta.{{cite book |last1=Neuman |first1=A.G. |last2=Brinkman |first2=D.B. |date=2005 |chapter=Fishes of the fluvial beds |editor-last1=Currie |editor-first1=P.J. |editor-last2=Koppelhus |editor-first2=E.B. |title=Dinosaur Provincial Park: A Spectacular Ancient Ecosystem Revealed |location=Bloomington, IN |publisher=Indiana University Press |pages=167–185 |isbn=978-0253345950 |chapter-url=https://www.researchgate.net/publication/287664210 }}