Palaeonisciformes

The Palaeonisciformes (Palaeoniscida) are an extinct order of early ray-finned fishes. Palaeonisciformes sensu lato first appeared in the fossil record in the Late Silurian and last appeared in the Late Cretaceous. The name is derived from the Ancient Greek words παλαιός (palaiós, ancient) and ὀνίσκος (oniskos, 'cod-fish' or woodlouse), probably pertaining to the organization of the fishes' scales, similar to the exoskeletal plating of woodlice.

 Classification 

 Order †Palaeonisciformes Hay, 1902 sensu stricto [Palaeoniscida Moy-Thomas & Miles, 1971]
 Family †Palaeoniscidae Vogt, 1852
 Genus ?†Agecephalichthys Wade, 1935
 Species †Agecephalichthys granulatus Wade, 1935
 Genus ?†Atherstonia Woodward, 18989 [Broometta Chabakov, 1927]
 Species †Atherstonia scutata Woodward, 1889 [Atherstonia cairncrossi Broom, 1913; Amblypterus capensis Broom, 1913; Broometta cairncrossi Chabakov, 1927]
 Species †Atherstonia minor Woodward, 1893
 Genus ?†Cryphaeiolepis Traquair, 1881
 Species †Cryphaeiolepis scutata Traquair, 1881
 Genus ?†Cteniolepidotrichia Poplin & Su, 1992
 Species †Cteniolepidotrichia turfanensis Poplin & Su, 1992
 Genus †Dicellopyge Brough, 1931
 Species †Dicellopyge macrodentata Brough, 1931
 Species †Dicellopyge lissocephalus Brough, 1931
 Genus ?†Duwaichthys Liu et al., 1990
 Species †Duwaichthys mirabilis Liu et al., 1990
 Genus ?†Ferganiscus Sytchevskaya & Yakolev, 1999
 Species †Ferganiscus osteolepis Sytchevskaya & Yakolev, 1999
 Genus †Gyrolepis Agassiz, 1833 non Kade, 1858
 Species †G. albertii Agassiz, 1833
 Species †G. gigantea Agassiz, 1833
 Species †G. maxima Agassiz, 1833
 Species †G. quenstedti Dames, 1888
 Species †G. tenuistriata Agassiz, 1833
 Genus †Gyrolepidoides Cabrera, 1944
 Species †G. creyanus Schaeffer, 1955
 Species †G. cuyanus Cabrera, 1944
 Species †G. multistriatus Rusconi, 1948
 Genus ?†Palaeoniscinotus Rohon, 1890
 Species †P. czekanowskii Rohon, 1890
 Genus †Palaeoniscum de Blainville, 1818 [Palaeoniscus Agassiz, 1833 non Von Meyer, 1858; Palaeoniscas Rzchak, 1881; Eupalaeoniscus Rzchak, 1881; Palaeomyzon Weigelt, 1930; Geomichthys Sauvage, 1888]
 Species †P. angustum (Rzehak, 1881) [Palaeoniscas angustus Rzehak, 1881]
 Species †P. antipodeum (Egerton, 1864) [Palaeoniscus antipodeus Egerton, 1864]
 Species †P. antiquum Williams, 1886
 Species †P. arenaceum Berger, 1832
 Species †P. capense (Bloom, 1913) [Palaeoniscus capensis Bloom, 1913]
 Species †P. comtum (Agassiz, 1833) [Palaeoniscus comtus Agassiz, 1833]
 Species †P. daedalium Yankevich & Minich, 1998
 Species †P. devonicum Clarke, 1885
 Species †P. elegans (Sedgwick, 1829) [Palaeoniscus elegans Sedgwick, 1829]
 Species †P. freieslebeni de Blainville, 1818 [Eupalaeoniscus freieslebeni (de Brainville, 1818); Palaeoniscus freieslebeni (de Brainville, 1818)]
 Species †P. hassiae (Jaekel, 1898) [Galeocerdo contortus hassiae Jaekel, 1898; Palaeomyzon hassiae (Jaekel, 1898)]
 Species †P. kasanense Geinitz & Vetter, 1880
 Species †P. katholitzkianum (Rzehak, 1881) [Palaeoniscas katholitzkianus Rzehak, 1881]
 Species †P. landrioti (le Sauvage, 1890) [Palaeoniscus landrioti le Sauvage, 1890]
 Species †P. longissimum (Agassiz, 1833) [Palaeoniscus longissimus Agassiz, 1833]
 Species †P. macrophthalmum (McCoy, 1855) [Palaeoniscus macrophthalmus McCoy, 1855]
 Species †P. magnum (Woodward, 1937) [Palaeoniscus magnus Woodward, 1937]
 Species †P. moravicum (Rzehak, 1881) [Palaeoniscas moravicus Rzehak, 1881]
 Species †P. promtu (Rzehak, 1881) [Palaeoniscas promtus Rzehak, 1881]
 Species †P. reticulatum Williams, 1886
 Species †P. scutigerum Newberry, 1868
 Species †P. vratislavensis (Agassiz, 1833) [Palaeoniscus vratislavensis Agassiz, 1833]
 Genus †Palaeothrissum de Blainville, 1818
 Species †P. elegans Sedgwick, 1829
 Species †P. macrocephalum de Blainville, 1818
 Species †P. magnum de Blainville, 1818
 Genus ?†Shuniscus Su, 1983
 Species †Shuniscus longianalis Su, 1983
 Genus ?†Suchonichthys Minich, 2001
 Species †Suchonichthys molini Minich, 2001
 Genus ?†Trachelacanthus Fischer De Waldheim, 1850
 Species †Trachelacanthus stschurovskii Fischer De Waldheim, 1850
 Genus ?†Triassodus Su, 1984
 Species †Triassodus yanchangensis Su, 1984
 Genus ?†Turfania Liu & Martínez, 1973
 Species †T. taoshuyuanensis Liu & Martínez, 1973
 Species †T. varta Wang, 1979
 Genus ?†Turgoniscus Jakovlev, 1968
 Species †Turgoniscus reissi Jakovlev, 1968
 Genus ?†Weixiniscus Su & Dezao, 1994
 Species †Weixiniscus microlepis Su & Dezao, 1994
 Genus ?†Xingshikous Liu, 1988
 Species †Xingshikous xishanensis Liu, 1988
 Genus ?†Yaomoshania Poplin et al., 1991
 Species †Yaomoshania minutosquama Poplin et al., 1991


 Other families attributed to Palaeonisciformes 
This list includes families that at one time or another were placed in this order.

 †Acropholidae Kazantseva-Selezneva, 1977
 †Atherstoniidae Gardiner, 1969
 †Brazilichthyidae Cox & Hutchinson, 1991
 †Centrolepididae Gardier, 1960
 †Coccolepididae Berg, 1940 corrig.
 †Commentryidae Gardiner, 1963
 †Cryphiolepididae MoyThomas, 1939 corrig.
 †Dwykiidae Gardiner, 1969
 †Holuridae Moy-Thomas, 1939
 †Igornichthyidae Heyler, 1977
 †Irajapintoseidae Beltan, 1978
 †Monesedeiphidae Beltan, 1989
 †Moythomasiidae Kazantseva, 1971
 †Rhabdolepididae Gardiner, 1963
 †Stegotrachelidae Gardiner, 1963
 †Thrissonotidae Berg, 1955
 †Tienshaniscidae Lu & Chen, 2010
 †Turseodontidae Bock, 1959 corrig.
 †Uighuroniscidae Jin, 1996
 †Urosthenidae Woodward, 1931

 Related pages 

 Acentrophorus
 Palaeoniscidae

 References 

 "Palaeonisciformes". Paleobiology Database. Retrieved November 17, 2012.

Category:Extinct fish
Category:Ray-finned fish