Orthocormus

{{Short description|Extinct genus of fishes}}

{{Automatic taxobox

| fossil_range = {{fossilrange|Kimmeridgian|earliest=Callovian}}

| image = Orthocormus cornutus 1.JPG

| image_caption = Fossil of Orthocormus roeperi

| image2 = Orthocormus cornutus.png

| image2_caption = Restoration of Orthocormus cornutus

| taxon = Orthocormus

| authority = Weitzel,1930

| type_species = Orthocormus cornutus

| type_species_authority = Weitzel,1930

| subdivision = *Orthocormus cornutus Weitzel, 1930

• Orthocormus teyleri Lambers, 1988
• Orthocormus roeperi Arratia & Schultze, 2013

}}

Orthocormus is an extinct genus of prehistoric pachycormiform bony fish.{{cite journal | last = Sepkoski | first = Jack | title = A compendium of fossil marine animal genera | journal = Bulletins of American Paleontology | volume = 364 |page=560 | year = 2002 | url = http://strata.ummp.lsa.umich.edu/jack/showgenera.php?taxon=611&rank=class | accessdate = 2009-02-27 }} It is known from three species found in Late Jurassic (Kimmeridgian) aged plattenkalk deposits in Bavaria, Germany.{{Cite journal|last1=Arratia|first1=Gloria|last2=Schultze|first2=Hans-Peter|date=2013|title=Outstanding features of a new Late Jurassic pachycormiform fish from the Kimmeridgian of Brunn, Germany and comments on current understanding of pachycormiforms|url=http://bionames.org/references/2cceff9865614fe77e7b8f337e18c502|journal=Mesozoic Fishes 5 - Global Diversity and Evolution Editors: Gloria Arratia, Hans-Peter Schultze, Mark V. H. Wilson|publisher=Verlag Dr. F. Pfeil|pages=87–120}} The species "Hypsocormus" tenuirostris Woodward 1889 from the late Middle Jurassic (Callovian) Oxford Clay is not closely related to the type species of Hypsocormus, and is more closely related to Orthocormus + Protosphyraena, and thus has sometimes been referred to in open nomenclature as Orthocormus? tenuirostris.{{Cite journal|last1=Maxwell|first1=Erin|last2=Lambers|first2=Paul|last3=Lopez-Arbarello|first3=Adriana|last4=Schweigert|first4=Günter|date=2020|title=Re-evaluation of pachycormid fishes from the Late Jurassic of Southwestern Germany|url=http://dx.doi.org/10.4202/app.00749.2020|journal=Acta Palaeontologica Polonica|volume=65|doi=10.4202/app.00749.2020|s2cid=221691151 |issn=0567-7920|doi-access=free}} The species of Orthocormus reached over a metre in length, and are thought to have been pelagic predators.