Ctenodus

{{Short description|Extinct genus of fishes}}

{{Automatic taxobox

| fossil_range = {{Fossil range|Tournaisian|Moscovian}}

| taxon = Ctenodus

| authority = Agassiz, 1838{{cite journal |last1=Sharp |first1=E. L. |last2=Clack |first2=J. A. |title=A review of the Carboniferous lungfish genus Ctenodus Agassiz, 1838 from the United Kingdom, with new data from an articulated specimen of Ctenodus interruptus Barkas, 1869 |journal=Earth and Environmental Science Transactions of the Royal Society of Edinburgh |date=July 2013 |volume=104 |issue=2 |pages=169–204 |doi=10.1017/S1755691013000479|s2cid=129223529 }}

}}

Ctenodus (from {{langx|el|κτείς}} {{Transliteration|el|kteis}}, 'comb' and {{langx|el|ὀδούς}} {{Transliteration|el|odoús}} 'tooth'){{cite book |last1=Roberts |first1=George |title=An etymological and explanatory dictionary of the terms and language of geology |date=1839 |publisher=Longman, Orme, Brown, Green, & Longmans |location=London |page=38 |url=https://archive.org/details/anetymologicala00robegoog |access-date=29 December 2021 |language=English}} is an extinct genus of prehistoric lungfish and the longest-surviving genus of Carboniferous lungfish.