Petrustitan
{{Short description|Extinct genus of dinosaurs}}
{{Speciesbox
| fossil_range = Maastrichtian, {{fossilrange|71|66}}
| image = Paralectotype and lectotype of Petrustitan hungaricus.jpg
| image_caption = Paralectotype and lectotype of Petrustitan
| taxon = Petrustitan hungaricus
| parent_authority = Díez Díaz et al., 2025
| authority = (von Huene, 1932)
[originally Magyarosaurus hungaricus]
}}
Petrustitan is a eutitanosaurian sauropod dinosaur from the Late Cretaceous (Maastrichtian) of Romania. The type and only species is P. hungaricus, originally assigned to the genus Magyarosaurus.{{Cite journal |last1=Díez Díaz |first1=V. |last2=Mannion |first2=P. D. |last3=Csiki-Sava |first3=Z. |last4=Upchurch |first4=P. |year=2025 |title=Revision of Romanian sauropod dinosaurs reveals high titanosaur diversity and body-size disparity on the latest Cretaceous Haţeg Island, with implications for titanosaurian biogeography |journal=Journal of Systematic Palaeontology |volume=23 |issue=1 |at=2441516 |doi=10.1080/14772019.2024.2441516|doi-access=free |bibcode=2025JSPal..2341516D }}
History of discovery
In 1932, Friedrich von Huene erected the genus Magyarosaurus and assigned three species based on sauropod specimens recovered from the Sânpetru Formation: M. dacus (the type species), M. hungaricus and M. transsylvanicus.von Huene, F. (1932). "Die fossile Reptil-Ordnung Saurischia, ihre Entwicklung und Geschichte." Mong. Geol. Pal., 4(1) pts. 1 and 2, viii +361 pp. However, subsequent analyses considered only M. dacus as a valid species of Magyarosaurus, with "M." transsylvanicus representing a chimera and partially a junior synonym of M. dacus, and with "M." hungaricus representing a distinct genus.{{cite journal|last1=Stein|first1=K.|last2=Csiki|first2=Z.|last3=Curry Rogers|first3=K.|last4=Weishampel|first4=D.B.|last5=Redelstorff|first5=R. |author6=Carballidoa, J.L. |author7=Sander, P.M.|year=2010|title=Small body size and extreme cortical bone remodeling indicate phyletic dwarfism in Magyarosaurus dacus (Sauropoda: Titanosauria)|journal=Proceedings of the National Academy of Sciences of the United States of America|volume=107|series=20|pages=9258–9263|doi=10.1073/pnas.1000781107|pmid=20435913|issue=20|pmc=2889090|bibcode=2010PNAS..107.9258S|doi-access=free}}
File:Petrustitan hungaricus.png
In 2025, Díez Díaz and colleagues reassigned "M." hungaricus to a new genus Petrustitan. The generic name is derived from Ancient Greek words πέτρα (pétra, "stone, rock"), referring to the origin of the holotype (rocky outcrops of the type locality, Sânpetru), and τιτάν (tītā́n, "giant"), which is often used when naming titanosaurian sauropods. Both the paralectotype (left tibia) and lectotype (left fibula) of P. hungaricus are catalogued under the same specimen number, NHMUK R.3853. Some material originally referred to this taxon were also given a separate genus name, Uriash.
References
{{Reflist}}
{{Sauropodomorpha|T.}}
{{Taxonbar|from=Q132639258}}
Category:Maastrichtian dinosaurs