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| {{Short description|Extinct genus of ray-finned fishes}} | |||
| {{Taxobox | |||
| {{italic title}} | |||
| ⚫ | | |
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| {{Speciesbox | |||
| | image = |
| image = Cooyoo_australis_23.jpg | ||
| | fossil_range = ] | |||
| | fossil_range = {{fossil range|106.2|100.5|Late ]}} | |||
| | regnum = ]ia | |||
| | image_caption = Reconstruction according to specimen "Wandah" | |||
| | phylum = ] | |||
| ⚫ | | taxon = Cooyoo australis | ||
| | classis = ] | |||
| ⚫ | | parent_authority = ] & Lees,<ref name=Bart-Lees>{{Cite journal | ||
| | superordo = ] | |||
| ⚫ | |||
| | familia = ] | |||
| | genus = '''''Cooyoo''''' | |||
| ⚫ | | |
||
| | last = Bartholomai | | last = Bartholomai | ||
| |author2= |
|author2=Lees | ||
| | title = Cretaceous actinopterygian (Class Pisces) Cooyoo australis from Queensland | | title = Cretaceous actinopterygian (Class Pisces) Cooyoo australis from Queensland | ||
| | journal = Memoirs of the Queensland Museum | | journal = Memoirs of the Queensland Museum | ||
| | year = 1987}}</ref> 1987 | | year = 1987}}</ref> 1987 | ||
| | authority = (], 1894) | |||
| | species = '''''C. australis''''' | |||
| | |
| synonyms = *†''Portheus australis'' <small>Woodward, 1894</small> | ||
| *†''] australis'' <small>(Woodward, 1894)</small> | |||
| | binomial_authority = Bartholomai & Less, 1987 | |||
| }} | }} | ||
| '''''Cooyoo''''' ("fish" in the ]) is an extinct genus of ] ] known from the ]. It contains a single species, '''''C. australis''''', known from the ]-aged ] and ] Formations of ], ].<ref name=Bart-Lees/> ''C. australis'' was originally named by ] as a species of ''Portheus'' (now a probable synonym of '']'') in 1894, which was later amended to ''Xiphactinus''.<ref name="Bart-Lees" /> | |||
| '''''Cooyoo australis''''' is a primitive ] found in ] strata of ], ]. As with all other ichthyodectids, it was a predator of smaller fish. | |||
| Some phylogenetic studies have recovered it as an indeterminate ], but later ones have found it to either be a sister of '']'', or more recently a true ichthyodectid related to '']''.<ref>{{Cite journal |last=Cavin |first=Lionel |last2=Forey |first2=Peter L. |last3=Giersch |first3=Samuel |date=2013 |title=Osteology of Eubiodectes libanicus (Pictet & Humbert, ) and some other ichthyodectiformes (Teleostei): phylogenetic implications |url=https://www.tandfonline.com/doi/full/10.1080/14772019.2012.691559 |journal=Journal of Systematic Palaeontology |language=en |volume=11 |issue=2 |pages=115–177 |doi=10.1080/14772019.2012.691559 |issn=1477-2019}}</ref><ref>{{Cite journal |last=Yabumoto |first=Yoshitaka |last2=Hirose |first2=Koji |last3=Brito |first3=Paulo M. |date=2020-03-15 |title=A new ichthyodectiform fish, Amakusaichthys goshouraensis gen. et sp. nov. from the Upper Cretaceous (Santonian) Himenoura Group in Goshoura, Amakusa, Kumamoto, Japan |url=https://www.tandfonline.com/doi/full/10.1080/08912963.2018.1497022 |journal=Historical Biology |language=en |volume=32 |issue=3 |pages=362–375 |doi=10.1080/08912963.2018.1497022 |issn=0891-2963}}</ref><ref>{{Cite journal |last=Cavin |first=Lionel |last2=Berrell |first2=Rodney W. |date=2019-01-02 |title=Revision of Dugaldia emmilta (Teleostei, Ichthyodectiformes) from the Toolebuc Formation, Albian of Australia, with comments on the jaw mechanics |url=https://www.tandfonline.com/doi/full/10.1080/02724634.2019.1576049 |journal=Journal of Vertebrate Paleontology |language=en |volume=39 |issue=1 |pages=e1576049 |doi=10.1080/02724634.2019.1576049 |issn=0272-4634}}</ref><ref name=":1">{{Cite journal |last=Berrell |first=Rodney W. |last2=Boisvert |first2=Catherine |last3=Trinajstic |first3=Kate |last4=Siversson |first4=Mikael |last5=Alvarado-Ortega |first5=Jesús |last6=Cavin |first6=Lionel |last7=Salisbury |first7=Steven W. |last8=Kemp |first8=Anne |date=2020-04-02 |title=A review of Australia’s Mesozoic fishes |url=https://www.tandfonline.com/doi/full/10.1080/03115518.2019.1701078 |journal=Alcheringa: An Australasian Journal of Palaeontology |language=en |volume=44 |issue=2 |pages=286–311 |doi=10.1080/03115518.2019.1701078 |issn=0311-5518}}</ref> | |||
| ''Cooyoo'' was a dominant predator of the ].<ref name=":1" /> As with all other ichthyodectids, it was a predator of smaller fish, and had large conical teeth to easily catch them.<ref name=":0">{{Cite news |last=Robertson |first=Joshua |date=2015-07-17 |title=100 million-year-old fossils shed new light on Australia’s ancient inland sea |url=https://www.theguardian.com/science/2015/jul/17/100-million-year-old-fossils-shed-new-light-on-australias-ancient-inland-sea |access-date=2024-06-12 |work=The Guardian |language=en-GB |issn=0261-3077}}</ref> In contrast, ''Cooyoo'' itself was a prey item for larger animals, as a skull has been found with potentially fatal bite marks, which are referable to a ] plesiosaur, an ] pterosaur, or most likely the ] '']''.<ref>{{Cite journal |last=Wretman |first=Lovisa |last2=Kear |first2=Benjamin P. |date=2014-04-03 |title=Bite marks on an ichthyodectiform fish from Australia: possible evidence of trophic interaction in an Early Cretaceous marine ecosystem |url=http://www.tandfonline.com/doi/abs/10.1080/03115518.2014.848692 |journal=Alcheringa: An Australasian Journal of Palaeontology |language=en |volume=38 |issue=2 |pages=170–176 |doi=10.1080/03115518.2014.848692 |issn=0311-5518}}</ref> | |||
| ''Cooyoo'' was initially described from a complete specimen with length about {{convert|1.1|m|ft}},<ref name="Bart-Lees" /> and other fossil remains have been found including near-complete skulls.<ref name=":0" /><ref>{{Cite news |date=2015-07-17 |title=Fossils of giant fish unearthed in outback Qld |url=https://www.abc.net.au/news/2015-07-17/ancient-fish-fossils-unearthed-in-outback-qld/6626890 |access-date=2024-06-12 |work=ABC News |language=en-AU}}</ref> In 2011, a {{convert|2.5|m|ft}} long intact fossil, nicknamed "Wandah", was discovered in north-west ]. According to Rob Levers, ] founder and chairman, it was possible to detect the fish in the stomach of that specimen. ''Cooyoo'' is the largest bony fish known from the Eromanga Sea.<ref>{{Cite web |title=Kronosaurus Korner - Fish |url=https://www.kronosauruskorner.com.au/museum/collections/fish |access-date=2023-07-06 |website=www.kronosauruskorner.com.au}}</ref><ref>{{Cite news |date=2023-02-28 |title=Tourists unearth 100 million-year-old marine predator in western Queensland |url=https://www.abc.net.au/news/2023-03-01/richmond-cooyoo-australis-fish-fossil-rare-find/102031456 |access-date=2023-03-03 |work=ABC News |language=en-AU}}</ref> | |||
| ==References== | ==References== | ||
| {{Reflist}} | {{Reflist}} | ||
| ⚫ | {{Ichthyodectiformes}} | ||
| ==External links== | |||
| * ] | |||
| {{Taxonbar|from=Q5168130}} | {{Taxonbar|from=Q5168130}} | ||
| ] | ] | ||
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{{Ichthyodectiformes-stub}} | ||
Latest revision as of 21:05, 17 November 2024
Extinct genus of ray-finned fishes
| Cooyoo Temporal range: Late Albian PreꞒ Ꞓ O S D C P T J K Pg N | |
|---|---|
| |
| Reconstruction according to specimen "Wandah" | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | †Ichthyodectiformes |
| Family: | †Ichthyodectidae |
| Genus: | †Cooyoo Bartholomai & Lees, 1987 |
| Species: | †C. australis |
| Binomial name | |
| †Cooyoo australis (Woodward, 1894) | |
| Synonyms | |
| |
Cooyoo ("fish" in the Yirandhali language) is an extinct genus of ichthyodectid ray-finned fish known from the Lower Cretaceous. It contains a single species, C. australis, known from the Albian-aged Toolebuc and Allaru Formations of Queensland, Australia. C. australis was originally named by Arthur Smith Woodward as a species of Portheus (now a probable synonym of Xiphactinus) in 1894, which was later amended to Xiphactinus.
Some phylogenetic studies have recovered it as an indeterminate ichthyodectiform, but later ones have found it to either be a sister of Unamichthys, or more recently a true ichthyodectid related to Ichthyodectes.
Cooyoo was a dominant predator of the Eromanga Sea. As with all other ichthyodectids, it was a predator of smaller fish, and had large conical teeth to easily catch them. In contrast, Cooyoo itself was a prey item for larger animals, as a skull has been found with potentially fatal bite marks, which are referable to a polycotylid plesiosaur, an ornithocheiroid pterosaur, or most likely the ichthyosaur Platypterygius.
Cooyoo was initially described from a complete specimen with length about 1.1 metres (3.6 ft), and other fossil remains have been found including near-complete skulls. In 2011, a 2.5 metres (8.2 ft) long intact fossil, nicknamed "Wandah", was discovered in north-west Queensland. According to Rob Levers, Kronosaurus Korner museum founder and chairman, it was possible to detect the fish in the stomach of that specimen. Cooyoo is the largest bony fish known from the Eromanga Sea.
References
- ^ Bartholomai; Lees (1987). "Cretaceous actinopterygian (Class Pisces) Cooyoo australis from Queensland". Memoirs of the Queensland Museum.
- Cavin, Lionel; Forey, Peter L.; Giersch, Samuel (2013). "Osteology of Eubiodectes libanicus (Pictet & Humbert, ) and some other ichthyodectiformes (Teleostei): phylogenetic implications". Journal of Systematic Palaeontology. 11 (2): 115–177. doi:10.1080/14772019.2012.691559. ISSN 1477-2019.
- Yabumoto, Yoshitaka; Hirose, Koji; Brito, Paulo M. (2020-03-15). "A new ichthyodectiform fish, Amakusaichthys goshouraensis gen. et sp. nov. from the Upper Cretaceous (Santonian) Himenoura Group in Goshoura, Amakusa, Kumamoto, Japan". Historical Biology. 32 (3): 362–375. doi:10.1080/08912963.2018.1497022. ISSN 0891-2963.
- Cavin, Lionel; Berrell, Rodney W. (2019-01-02). "Revision of Dugaldia emmilta (Teleostei, Ichthyodectiformes) from the Toolebuc Formation, Albian of Australia, with comments on the jaw mechanics". Journal of Vertebrate Paleontology. 39 (1): e1576049. doi:10.1080/02724634.2019.1576049. ISSN 0272-4634.
- ^ Berrell, Rodney W.; Boisvert, Catherine; Trinajstic, Kate; Siversson, Mikael; Alvarado-Ortega, Jesús; Cavin, Lionel; Salisbury, Steven W.; Kemp, Anne (2020-04-02). "A review of Australia's Mesozoic fishes". Alcheringa: An Australasian Journal of Palaeontology. 44 (2): 286–311. doi:10.1080/03115518.2019.1701078. ISSN 0311-5518.
- ^ Robertson, Joshua (2015-07-17). "100 million-year-old fossils shed new light on Australia's ancient inland sea". The Guardian. ISSN 0261-3077. Retrieved 2024-06-12.
- Wretman, Lovisa; Kear, Benjamin P. (2014-04-03). "Bite marks on an ichthyodectiform fish from Australia: possible evidence of trophic interaction in an Early Cretaceous marine ecosystem". Alcheringa: An Australasian Journal of Palaeontology. 38 (2): 170–176. doi:10.1080/03115518.2014.848692. ISSN 0311-5518.
- "Fossils of giant fish unearthed in outback Qld". ABC News. 2015-07-17. Retrieved 2024-06-12.
- "Kronosaurus Korner - Fish". www.kronosauruskorner.com.au. Retrieved 2023-07-06.
- "Tourists unearth 100 million-year-old marine predator in western Queensland". ABC News. 2023-02-28. Retrieved 2023-03-03.
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| Taxon identifiers | |
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| Cooyoo australis | |
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