# Caproberyx
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> Source: https://en.wikipedia.org/wiki/Caproberyx
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{{Short description|Extinct genus of fishes}}
{{Italic title}}{{Speciesbox
| fossil_range = {{fossil range|94|89.8|[Turonian](/source/Turonian)}}
| image = Pen and Pencil (newspaper), 24 February 1855 page 13, Lately discovered Fossil Fish, Beryx Superbus (cropped).jpg
| image_caption = Illustration of type specimens
| parent_authority = [Regan](/source/Charles_Tate_Regan), 1911
| taxon = Caproberyx superbus
| authority = (Dixon, 1850)
| synonyms = * ''[Beryx](/source/Beryx) superbus'' Dixon, 1850
* ''[Berycopsis](/source/Berycopsis) major'' [Woodward](/source/Arthur_Smith_Woodward), 1902
}}
'''''Caproberyx''''' is an [extinct](/source/extinct) [genus](/source/genus) of marine [acanthomorph](/source/Acanthomorpha) [ray-finned fish](/source/Actinopterygii), possibly a [holocentrid](/source/Holocentridae), from the [Late Cretaceous](/source/Late_Cretaceous).[{{Cite web |title=PBDB Taxon |url=https://paleobiodb.org/classic/basicTaxonInfo?taxon_no=439584 |access-date=2024-04-19 |website=paleobiodb.org}}]
It contains a single species, '''''C. superbus''''', from the early to late [Turonian](/source/Turonian) of the [English Chalk](/source/Chalk_Group). Other former species found in [Lebanon](/source/Lebanon) (''C. pharsus'') and [Morocco](/source/Morocco) (''C. polydesmus'') have been assigned to their own genera (''[Pattersonoberyx](/source/Pattersonoberyx)'' and ''[Stichoberyx](/source/Stichoberyx)'' respectively).[{{Cite journal |last1=Friedman |first1=Matt |last2=Beckett |first2=Hermione T. |last3=Close |first3=Roger A. |last4=Johanson |first4=Zerina |date=2016 |title=The English Chalk and London Clay: two remarkable British bony fish Lagerstätten |url=https://www.lyellcollection.org/doi/10.1144/SP430.18 |journal=Geological Society, London, Special Publications |language=en |volume=430 |issue=1 |pages=165–200 |doi=10.1144/SP430.18 |issn=0305-8719|url-access=subscription }}][{{Cite journal |last=Murray |first=Alison M. |date=2014 |title=Mid-Cretaceous acanthomorph fishes with the description of a new species from the Turonian of Lac des Bois, Northwest Territories, Canada |url=https://journals.library.ualberta.ca/vamp/index.php/VAMP/article/view/25439 |journal=Vertebrate Anatomy Morphology Palaeontology |language=en |volume=1 |pages=101–115 |doi=10.18435/B5CC78 |issn=2292-1389|doi-access=free }}] Potential remains of an indeterminate species have also been found in the [Smoky Hill Chalk](/source/Smoky_Hill_Chalk) of [Kansas](/source/Kansas), USA.[{{Cite web |last=Pool |first=Bob |date=1991-08-16 |title=A Fish Catch With Cachet : Buyer Must Donate Fossil to Museum, but Gets to Name Species |url=https://www.latimes.com/archives/la-xpm-1991-08-16-me-468-story.html |access-date=2024-04-19 |website=Los Angeles Times |language=en-US}}][{{Cite journal |last1=Allen |first1=Jonathan G. |last2=Shimada |first2=Kenshu |date=2021-10-01 |title=Fossil vertebrates from a unique marine bonebed of the Upper Cretaceous Smoky Hill Chalk, western Kansas, U.S.A.: new insights into the paleoecology of the Niobrara Formation |url=https://www.tandfonline.com/doi/full/10.1080/02724634.2021.2066999 |journal=Journal of Vertebrate Paleontology |language=en |volume=41 |issue=6 |article-number=e2066999 |doi=10.1080/02724634.2021.2066999 |issn=0272-4634|url-access=subscription }}] The fossil of a similar fish is also known from the [Mancos Shale](/source/Mancos_Shale) of [New Mexico](/source/New_Mexico), USA.[{{Cite journal |title=New Mexico Geological Society Annual Spring Meeting:Abstract |url=https://nmgs.nmt.edu/meeting/abstracts/view.cfm?aid=2894 |access-date=2024-04-19 |website=New Mexico Geological Society |language=en |doi=10.56577/sm-2023.2894}}]
[[File:Canadaga, Ichthyornis, Scapanorhynchus, Caproberyx JWArtworks.png|left|thumb|296x296px|Restored [Western Interior Seaway](/source/Western_Interior_Seaway) scene with ''Caproberyx'']]
Previously considered a [berycid](/source/Berycidae), it has more recently often been considered an early holocentrid, making it related to [squirrelfishes](/source/Holocentrinae) and [soldierfishes](/source/Myripristinae).[{{Cite journal |last1=Andrews |first1=James V. |last2=Schein |first2=Jason P. |last3=Friedman |first3=Matt |date=2023 |title=An earliest Paleocene squirrelfish (Teleostei: Beryciformes: Holocentroidea) and its bearing on the timescale of holocentroid evolution |journal=Journal of Systematic Palaeontology |language=en |volume=21 |issue=1 |article-number=2168571 |doi=10.1080/14772019.2023.2168571 |bibcode=2023JSPal..2168571A |issn=1477-2019|doi-access=free }}]
The species name ''superbus'' references the exceptional nature of some specimens, consisting of three-dimensionally preserved mass death assemblages with mouths open in [tetany](/source/tetany). Such specimens may be the result of rapid burial following these mass mortalities.