imported>IJReid: − 7 categories; + 3 categories using HotCat

2025-05-20T02:28:14Z

− 7 categories; + 3 categories using HotCat

New page

{{Short description|Extinct genus of dinosaurs}}
{{Speciesbox
|fossil_range=[[Late Cretaceous]], {{fossilrange|75}}
|image=Adamantisaurus mezzalirai 2copia.jpg
|image_caption=Life reconstruction
|genus=Adamantisaurus
|parent_authority=[[Rodrigo Santucci|Santucci]] & [[Reinaldo Jose Bertini|Bertini]], 2006
|species=mezzalirai
|authority=Santucci & Bertini, 2006
}}

'''''Adamantisaurus''''' ({{IPAc-en|ˌ|æ|d|ə|ˌ|m|æ|n|t|ɪ|ˈ|s|ɔːr|ə|s}} {{respell|AD|ə|MAN|tiss|OR|əs}}) is a poorly-known [[genus]] of [[titanosauria]]n [[sauropod]] [[dinosaur]] from the [[Late Cretaceous]] [[Period (geology)|Period]] of what is now [[South America]]. It is only known from six tail [[vertebra]]e but, as a sauropod, it can be assumed that this dinosaur was a very large animal with a long neck and tail.
[[File:Adamantisaurus by Ademar Pereira.JPG|thumb|Sculpture of ''Adamantisaurus'']]

Like many titanosaurians, ''Adamantisaurus'' is incompletely known, making its exact relationships difficult to establish. However, similarities have been noted with ''[[Aeolosaurus]]'' and the Bauru Group titanosaurian formerly known as the "Peiropolis titanosaur", now called ''[[Trigonosaurus]]''.

==Description==
As ''Adamantisaurus mezzalirai'' is only known from the anterior portion of the tail, relatively little is known about the anatomy of this species. It was probably a medium-sized titanosaur. In 2010 [[Gregory S. Paul]] estimated it to be roughly 13 meters (43 ft) long and 5 tonnes (5.5 short tons) in weight .<ref name=GSP/> However, in 2020 Molina-Pérez and Larramendi gave a larger estimation of 18 meters (60 ft) and 14.4 tonnes (15.8 short tons).<ref>{{Cite book|last=Molina-Pérez & Larramendi|title=Dinosaur Facts and Figures: The Sauropods and Other Sauropodomorphs|publisher=Princeton University Press|year=2020|location=New Jersey|pages=266|bibcode=2020dffs.book.....M }}</ref>

==Discovery and naming==
Although this animal's remains were first mentioned in print in 1959, it was not named until the description written by [[Brazil]]ian [[paleontologist]]s [[Rodrigo Santucci]] and [[Reinaldo Bertini]] in 2006. It was the first dinosaur named in that year. The type specimen, the only material known of the genus, consists of the second through seventh caudal vertebrae and two chevrons.<ref name=Adamantisaurus/>

''Adamantisaurus'' is currently known only from the [[Adamantina Formation]] of Brazil. The Adamantina Formation is part of the [[Bauru Group]] of [[geologic formation]]s. The [[stratigraphy]] and exact age of the Bauru Group is still unsettled, but the Adamantina probably occurs somewhere between the [[Turonian]] through early [[Maastrichtian]] stages of the [[Late Cretaceous]] Period (93 to 70 million years ago). ''Adamantisaurus'' shares the Adamantina with fellow titanosaurian, ''[[Gondwanatitan]]''.

''Adamantisaurus'' is named after the [[Adamantina Formation]] in the Brazilian state of [[São Paulo (state)|São Paulo]], where the [[fossil]] was found and also incorporates the [[Ancient Greek|Greek]] word ''sauros'' meaning 'lizard', the most common suffix used in dinosaur names.<ref name=Adamantisaurus/> The type and only species, ''Adamantisaurus mezzalirai'' is named in honor of [[Sérgio Mezzalira]], the Brazilian [[geologist]] who originally found the specimen and first mentioned it in print.

==Classification==
The phylogenetic relationship of ''Adamantisaurus'' has yet to be rigorously tested. However, it appears to be more derived than ''Malawisaurus'' based on the ball-and-socket articulation of the caudal vertebrae.<ref name=Adamantisaurus/> All titanosaurs at least as derived as ''Malawisaurus'' are members of the clade [[Lithostrotia]].<ref name=Titanosaurus/> Within that clade, however, its relationships are unclear. ''Adamantisaurus'' resembles ''Aeolosaurus'', a close relative of its contemporary ''Gondwanatitan'', in some respects. ''Adamantisaurus'' cannot be directly compared to ''Brasilotitan'', another genus found in the Adamantina Formation.<ref name=Brasilotitan/>

==References==
{{Reflist|2|refs=
<ref name=Adamantisaurus>{{cite journal |first1=R. M. |last1=Santucci |first2=R. J. |last2=Bertini |year=2006 |title=A new titanosaur from western São Paulo State, Upper Cretaceous Bauru Group, south-east Brazil |journal=Palaeontology |volume=49 |issue=1 |pages=59–66 |doi=10.1111/j.1475-4983.2005.00527.x |bibcode=2006Palgy..49...59S |hdl=11449/33993 |hdl-access=free }}</ref>
<ref name=Brasilotitan>{{cite journal |first1=E. B. |last1=Machado |first2=L. D. S. |last2=Avilla |first3=W. R. |last3=Nava |first4=D. D. A. |last4=Campos |first5=A. W. A. |last5=Kellner |title=A new titanosaur sauropod from the Late Cretaceous of Brazil |journal=Zootaxa |year=2013 |volume=3701 |issue=3 |pages=301–321 |doi=10.11646/zootaxa.3701.3.1 |pmid=26191585 }}</ref>
<ref name=GSP>{{cite book |first1=G. S. |last1=Paul |year=2010 |title=The Princeton Field Guide to Dinosaurs |url=https://archive.org/details/princetonfieldgu0000paul |url-access=registration |publisher=Princeton University Press }}</ref>
<ref name=Titanosaurus>{{cite journal |first1=J. A. |last1=Wilson |first2=P. |last2=Upchurch |year=2003 |title=A revision of ''Titanosaurus'' Lydekker (Dinosauria–Sauropoda), the first dinosaur genus with a 'Gondwanan' distribution |journal=Journal of Systematic Palaeontology |volume=1 |issue=3 |pages=125–160 |doi=10.1017/S1477201903001044 |bibcode=2003JSPal...1..125W }}</ref>
}}

==Further reading==
{{Portal|Dinosaurs}}
*{{cite journal |last1=Mezzalira |first1=S |year=1959 |title=Nota preliminar sobre as recentes descobertas paleontológicas no Estado de São Paulo, no período 1958–59 |journal=Notas Prévias do Instituto Geográfico e Geológico |volume=2 |pages=1–7 }} [In Portuguese]
*Powell, J.E. 1987. Morfológia del esqueleto axial de los dinossaurios titanosáuridos (Saurischia, Sauropoda) del Estado de Minas Gerais, Brasil. In ''Anais X Congresso Brasileiro de Paleontologia, Rio de Janeiro.'' Rio de Janeiro: Sociedade Brasileira de Paleontologia. Pp. 155–171. [In Spanish]
*{{cite journal |last1=Powell |first1=J.E. |year=2003 |title=Revision of South American titanosaurid dinosaurs: palaeobiological, palaeobiogeographical and phylogenetic aspects |journal=Records of the Queen Victoria Museum |volume=111 |pages=1–173 }}

{{Sauropodomorpha|T.}}
{{Taxonbar|from=Q285364}}

[[Category:Lithostrotia]]
[[Category:Dinosaur genera]]
[[Category:Campanian dinosaurs]]
[[Category:Adamantina Formation]]
[[Category:Dinosaurs of Brazil]]
[[Category:Fossil taxa described in 2006]]

Adamantisaurus - Revision history

imported>IJReid: − 7 categories; + 3 categories using HotCat