https://en.bharatpedia.org/w/index.php?action=history&feed=atom&title=UnaysauridaeUnaysauridae - Revision history2026-10-25T06:45:18ZRevision history for this page on the wikiMediaWiki 1.43.6https://en.bharatpedia.org/w/index.php?title=Unaysauridae&diff=542589&oldid=prevShereeScotto4: made initial data first draft2025-10-02T10:13:03Z<p>made initial data first draft</p>
<p><b>New page</b></p><div>{{short description|Extinct clade of dinosaurs}}<br />
{{Automatic taxobox<br />
| name = Unaysaurids<br />
| fossil_range = [[Late Triassic]], {{fossil range|225|209}}<br />
| image = Unaysaurus.jpg<br />
| image_caption = Restoration of ''Unaysaurus''<br />
| taxon = Unaysauridae<br />
| authority = Müller ''et al.'', 2018<br />
| subdivision_ranks = Genera<br />
| subdivision = *{{extinct}}''[[Jaklapallisaurus]]''<br />
*{{extinct}}''[[Macrocollum]]''<br />
*{{extinct}}''[[Unaysaurus]]''<br />
}}<br />
<br />
'''Unaysauridae''' is a [[clade]] of basal [[sauropodomorph]]s from the Late [[Triassic]] of [[India]] and [[Brazil]].<br />
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==Diagnosis and systematics==<br />
Unaysauridae was defined by Müller ''et al.'' (2018) as the most inclusive clade including ''Unaysaurus tolentinoi'', but not ''[[Plateosaurus engelhardti]]'' nor ''[[Saltasaurus loricatus]]''.<ref name=Muller2018 /><br />
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Members of Unaysauridae are diagnosed by a substantially expanded cranial part of the medial condyle of the astragalus, as well as a promaxillary fenestra. Unaysauridae is sister to Plateosauria, more derived than ''[[Nambalia]]'', ''[[Thecodontosaurus]]'' ISI R277, ''[[Pantydraco]]'', and ''[[Efraasia]]''.<ref name="Muller2018">{{cite journal |author1=Rodrigo Temp Müller |author2=Max Cardoso Langer |author3=Sérgio Dias-da-Silva |year=2018 |title=An exceptionally preserved association of complete dinosaur skeletons reveals the oldest long-necked sauropodomorphs |journal=Biology Letters |volume=14 |issue=11 |article-number=20180633 |doi=10.1098/rsbl.2018.0633 |pmid=30463923 |pmc=6283919 }}</ref> ''Unaysaurus'' and ''Jaklapallisaurus'' had previously been assigned to [[Plateosauridae]] by prior authors.<ref>{{cite journal | last1 = Leal | first1 = L.A. | last2 = Azevodo | first2 = S.A.K. | last3 = Kellner | first3 = A.A.W. | last4 = da Rosa | first4 = A.A.S. | year = 2004 | title = A new early dinosaur (Sauropodomorpha) from the Caturrita Formation (Late Triassic), Paraná Basin, Brazil | journal = Zootaxa | volume = 690 | pages = 1–24 | url = http://www.mapress.com/zootaxa/2004f/z00690f.pdf | doi = 10.11646/zootaxa.690.1.1 |archive-url=https://web.archive.org/web/20231119170743/https://www.mapress.com/zootaxa/2004f/z00690f.pdf |archive-date=November 19, 2023 |url-status=live }}</ref><ref>{{cite journal |last=[[Fernando Novas|Novas]] |first=Fernando E. |last2=Ezcurra |first2=Martín D. |last3=[[Sankar Chatterjee|Chatterjee]] |first3=Sankar |last4=Kutty |first4=T.S. |year=2011 |title=New dinosaur species from the Upper Triassic Upper Maleri and Lower Dharmaram formations of central India |url=https://www.researchgate.net/publication/231824148 |journal=[[Earth and Environmental Science Transactions of the Royal Society of Edinburgh]] |volume=101 |issue=3-4 |pages=333–349 |doi=10.1017/S1755691011020093}}</ref> However, Beccari ''et al''. (2021) questioned the validity of Unaysauridae in their description of ''[[Issi|Issi saaneq]]'' because it "suffers from the missing data and fragmentary nature of specimens. For example, one synapomorphy of unaysaurids is related to the astragalus medial end length ratio to the anteroposterior length of the lateral end, a which has not been confirmed in ''U. tolentinoi'', whereas a second synapomorphy, the presence of a promaxillary fenestra, cannot be observed in ''J. asymmetrica ''which lacks the required cranial remains."<ref name=":0">{{Cite journal |last1=Beccari |first1=Victor |last2=Mateus |first2=Octávio |last3=Wings |first3=Oliver |last4=Milàn |first4=Jesper |last5=Clemmensen |first5=Lars B. |date=2021-11-03 |title=Issi saaneq gen. et sp. nov.—A New Sauropodomorph Dinosaur from the Late Triassic (Norian) of Jameson Land, Central East Greenland |journal=Diversity |language=en |volume=13 |issue=11 |page=561 |doi=10.3390/d13110561 |issn=1424-2818|doi-access=free |hdl=10362/128951 |hdl-access=free }}</ref> Subsequently, their phylogenetic analysis recovered ''Unaysaurus'' and ''Macrocollum'' within Plateosauridae.<ref name=":0" /><br />
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==References==<br />
{{Reflist}}<br />
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{{Portal|Dinosaurs}}<br />
{{Sauropodomorpha|S.}}<br />
{{Taxonbar|from=Q59124438}}<br />
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[[Category:Unaysauridae| ]]<br />
[[Category:Dinosaur families]]<br />
[[Category:Late Triassic dinosaurs]]</div>ShereeScotto4