Opsithrissops

{{Short description|Extinct genus of fishes}}

{{Automatic taxobox

| fossil_range = {{fossilrange|59|56|Thanetian{{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 }}}}

| taxon = Opsithrissops

| authority = Daniltshenko, 1968

| type_species = Opsithrissops osseus

| type_species_authority = Danilchenko, 1968

}}

Opsithrissops is an extinct genus of prehistoric bony fish that lived during the Thanetian stage of the Paleocene epoch. It is a {{convert|120|cm|ft|}} fish{{Cite journal |last1=Cavin |first1=Lionel |last2=Piuz |first2=André |last3=Ferrante |first3=Christophe |last4=Guinot |first4=Guillaume |date=2021-06-03 |title=Giant Mesozoic coelacanths (Osteichthyes, Actinistia) reveal high body size disparity decoupled from taxic diversity |journal=Scientific Reports |volume=11 |issue=1 |pages=11812 |doi=10.1038/s41598-021-90962-5 |issn=2045-2322 |pmc=8175595 |pmid=34083600|bibcode=2021NatSR..1111812C }} in the family Osteoglossiformes which includes other bony-tongues such as the extant species of arowana and arapaima.{{Cite journal |last1=Taverne |first1=L. |last2=Kumar |first2=Kishor |last3=Rana |first3=R. |date=2009 |title=Complement to the study of the Indian Paleocene osteoglossid fish genus Taverneichthys (Teleostei, Osteoglossomorpha) |url=https://www.vliz.be/imisdocs/publications/240393.pdf |journal=Bulletin de l'Institut Royal des Sciences Naturelles de Belgique, Sciences de la Terre |language=en |volume=79 |pages=155–160}}