What is Pycnodontiformes?
[[File:Coccodus insignis.JPG|thumb|''[[Coccodus]]'']] '''Pycnodontiformes''' is an extinct order of primarily marine [[bony fish]]. These [[prehistoric fish]] resembled the [[Opah|opahs]], but the upper part was larger. This is seen in the genus ''[[Megalampris]]''. The type genus is ''[[Pycnodus]]''. == Families and genera == '''Order Pycnodontiformes''' * Genus ''Acrorhinichthys'' <small>Taverne & Capasso, 2015</small> * Genus ''Archaeopycnodon'' <small>Sanchez & Benedetto, 1980</small> * Genus ''Arduafrons'' <small>Frickhinger, 1991</small> * Genus ''[[Athrodon]]'' <small>le Sauvage 1880 non Osborn, 1887</small> * Genus ''Callodus'' <small>Thurmond, 1974</small> * Genus ''Ellipsodus'' <small>Cornuel, 1877</small> * Genus ''Eomesodon'' <small>Woodward, 1918</small> * Genus ''[[Grypodon]]'' <small>Hay, 1899</small> * Genus ''Mercediella'' <small>Koerber, 2012</small> * Genus ''Paramesturus'' <small>Taverne, 1981</small> * Genus ''[[Piranhamesodon]]'' <small>Kölbl-Ebert ''et al.'', 2018</small> * Genus ''Pseudopycnodus'' <small>Taverne, 2003</small> * Genus ''Tergestinia'' <small>Capasso, 2000</small> * Genus ''Thurmondella'' <small>Thurmond, 1974 non</small> * Genus ''Uranoplosus'' <small>le Sauvage, 1879</small> * Genus ?''[[Woodthropea]]'' <small>Swinnerton, 1925</small> ** '''Family''' '''[[Brembodontidae]]''' <small>Tintori, 1981</small> *** Genus ''[[Brembodus]]'' <small>Tintori, 1981</small> *** Genus ''[[Gibbodon]]'' <small>Tintori, 1981</small> ** '''Family''' ?'''Hadrodontidae''' <small>Thurmond & Jones, 1981</small> *** Genus ''Hadrodus'' <small>Leidy, 1858</small> ** '''Family''' '''Gyrodontidae''' <small>Berg, 1940</small> *** Genus ''Gyrodus'' <small>Agassiz, 1833</small> ** '''Family''' '''Mesturidae''' <small>Nursall, 1996</small> *** Genus ''Mesturus'' <small>Wagner, 1862</small> ** '''Family''' '''[[Pycnodontidae]]''' <small>Agassiz, 1833 corrig. Bonaparte, 1845</small> *** Genus ''Abdobalistum'' <small>Poyato-Ariza & Wenz, 2002</small> *** Genus ''Acrotemnus'' <small>Agassiz, 1843</small> ***