Editing Skate (fish) (section)

===Evolution===
Skates belong to the ancient lineage of cartilaginous fishes. Fossil [[Dermal denticle|denticle]]s (tooth-like scales in the skin) resembling those of today's [[chondrichthyan]]s date at least as far back as the [[Ordovician]], with the oldest unambiguous fossils of [[cartilaginous fish]] dating from the middle [[Devonian]]. A [[clade]] within this diverse family, the [[Neoselachii]], emerged by the [[Triassic]], with the best-understood neoselachian fossils dating from the [[Jurassic]]. This [[clade]] is represented today by [[shark]]s, [[sawfish]], [[ray (fish)|ray]]s and skates.<ref>[http://www.ucmp.berkeley.edu/vertebrates/basalfish/chondrofr.html UCMP Berkeley "Chondrichthyes: Fossil Record"]</ref>

The body plan of skates is caused by skate-specific genomic rearrangements that have altered the three-dimensional regulatory landscape of genes. These changes arose about 286–221  million years ago when skates diverged from sharks.<ref name='nature2023'>{{cite journal |last1=Marlétaz |first1=Ferdinand |last2=de la Calle-Mustienes |first2=Elisa |last3=Acemel |first3=Rafael D. |last4=Paliou |first4=Christina |last5=Naranjo |first5=Silvia |last6=Martínez-García |first6=Pedro Manuel |last7=Cases |first7=Ildefonso |last8=Sleight |first8=Victoria A. |last9=Hirschberger |first9=Christine |last10=Marcet-Houben |first10=Marina |last11=Navon |first11=Dina |last12=Andrescavage |first12=Ali |last13=Skvortsova |first13=Ksenia |last14=Duckett |first14=Paul Edward |last15=González-Rajal |first15=Álvaro |last16=Bogdanovic |first16=Ozren |last17=Gibcus |first17=Johan H. |last18=Yang |first18=Liyan |last19=Gallardo-Fuentes |first19=Lourdes |last20=Sospedra |first20=Ismael |last21=Lopez-Rios |first21=Javier |last22=Darbellay |first22=Fabrice |last23=Visel |first23=Axel |last24=Dekker |first24=Job |last25=Shubin |first25=Neil |last26=Gabaldón |first26=Toni |last27=Nakamura |first27=Tetsuya |last28=Tena |first28=Juan J. |last29=Lupiáñez |first29=Darío G. |last30=Rokhsar |first30=Daniel S. |last31=Gómez-Skarmeta |first31=José Luis |title=The little skate genome and the evolutionary emergence of wing-like fins |journal=Nature |date=20 April 2023 |volume=616 |issue=7957 |pages=495–503 |doi=10.1038/s41586-023-05868-1 |pmid=37046085 |pmc=10115646 |bibcode=2023Natur.616..495M }}</ref>