[dinosaur] Uberabatitan vertebral air-sacs + Orthomerus + Eolambia + Giganotosaurus

Ben Creisler
[email protected]

Some new or recent dino papers:



Tito Aureliano, Aline M. Ghilardi, Julian C.G. Silva Junior, Agustín G.
Martinelli, Luiz Carlos Borges Ribeiro, Thiago Marinho, Marcelo A.
Fernandes, Fresia Ricardi-Branco & P. Martin Sander (2019)
Influence Of Taphonomy On Histological Evidence For Vertebral Pneumaticity
In An Upper Cretaceous Titanosaur From South America
Cretaceous Research: 104337 (advance online publication)
https://urldefense.proofpoint.com/v2/url?u=https-3A__doi.org_10.1016_j.cretres.2019.104337&d=DwIFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=c8fgNIsSnhV9eRB_FVB8q9uuQBTuwtQybknsT6KawhY&s=iWtoHJ5cDHc9vdU8wa-K4zu985Q26vRmZSscwDNDS5g&e= 
https://urldefense.proofpoint.com/v2/url?u=https-3A__www.sciencedirect.com_science_article_pii_S0195667119302939&d=DwIFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=c8fgNIsSnhV9eRB_FVB8q9uuQBTuwtQybknsT6KawhY&s=GDlEmeIOpim0tQvB2AjeFKG9etRt4Utne176QQfaH-0&e= 


Highlights

A new workflow for CT-Scan imaging is presented.
Pneumosteum is described in a cervical vertebra of a titanosaur.
We corroborate previous hypotheses on the insertion of bird-like air-sacs
system on titanosaurian vertebrae based on external observation and
CT-Scans.
It is possible that the camellate architecture is directly influenced by
the air-sacs system that surrounds the vertebra.
A good understanding on the diagenesis of a specimen could avoid false
negatives of pneumosteum.


Abstract

There is a necessity to systematically sample taxa to enlighten our
knowledge on the presence of histological correlates of avian-like air sacs
among dinosaurs. This work expands the studies on the occurrence of
pneumosteum in sauropods to the Brazilian lithostrotian titanosaur
Uberabatitan ribeiroi. This confirms previous hypotheses on the insertion
of an air sacs system on titanosaurian vertebrae based on external
observation and CT-scans. We also highlight that diagenesis can obliterate
traces of pneumosteal bone. Caution is required to have a good
understanding of the diagenetic history of the studied specimens. This
could avoid false negatives, especially when sampling pneumatic
histological traces in stem taxa. Additionally, we describe a new workflow
for manipulating CT-scan data using open-source software. The goal is to
make this technology more accessible to research groups with limited
funding and potentialize the achievement of more paleontological data.

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Free pdf:

Daniel Madzia, John W.M. Jagt & Eric W.A. Mulder (2019)
Osteology, phylogenetic affinities and taxonomic status of the enigmatic
late Maastrichtian ornithopod taxon Orthomerus dolloi (Dinosauria,
Ornithischia).
Cretaceous Research: 104334 (advance online publication)
doi: https://urldefense.proofpoint.com/v2/url?u=https-3A__doi.org_10.1016_j.cretres.2019.104334&d=DwIFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=c8fgNIsSnhV9eRB_FVB8q9uuQBTuwtQybknsT6KawhY&s=wlDiH0c8ijbKrlJoZNqu4bOJkhC2p81K30cYVQqx7no&e= 
https://urldefense.proofpoint.com/v2/url?u=https-3A__www.sciencedirect.com_science_article_pii_S0195667119302654&d=DwIFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=c8fgNIsSnhV9eRB_FVB8q9uuQBTuwtQybknsT6KawhY&s=bxRY6TZ2GW3a5h3IwRD4uFKthYScArt6RgxxNzCKoTs&e= 


Ornithopod dinosaurs were abundant inhabitants of European islands during
the Late Cretaceous. The long history of dinosaur research in Europe has
led to the establishment of new taxa for numerous ornithopod specimens that
received considerable attention in the literature; however, many of these
remain essentially unstudied. This explains why little is known of their
potential phylogenetic, ecological and biogeographical importance. Here we
provide a reassessment of Orthomerus dolloi, an enigmatic ornithopod taxon
that was established on the basis of isolated appendicular elements,
including a left tibia, a right femur, a left femur and a metatarsal. The
material originates from the uppermost Maastrichtian of southern Limburg
(the Netherlands) or adjacent Belgian territory. Despite the fact that they
have been known for almost 140 years, none of these elements has been
evaluated in detail since their original description. Here we redescribe
and illustrate the syntypes of O. dolloi, and compare them to corresponding
elements in other latest Cretaceous ornithopods from Europe. The character
distribution in O. dolloi is further explored by means of phylogenetic
analyses, using a revised ornithopod-wide dataset. The material belongs to
at least two, probably conspecific, individuals that show clear
hadrosauroid affinities, although the exact placement of the taxon within
the clade remains contentious, because it is likely that its elements are
osteologically immature. Therefore, the common assignment of O. dolloi to
hadrosaurid ornithopods is questionable. Nevertheless, our revision of the
material has not identified any autapomorphies, nor a combination of
characters that would be indisputably unique among Hadrosauroidea.
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Free pdf:

Thiago Vernaschi V. Costa (2019)
Remarks on the name of the hadrosauroid dinosaur Eolambia caroljonesa
Kirkland, 1998 (Ornithischia)
Revista Brasileira de Paleontologia 22(2):165–166
doi:10.4072/rbp.2019.2.07
https://urldefense.proofpoint.com/v2/url?u=http-3A__www.sbpbrasil.org_assets_uploads_files_rbp2019207.pdf&d=DwIFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=c8fgNIsSnhV9eRB_FVB8q9uuQBTuwtQybknsT6KawhY&s=BWpMRtegDg7TL-Dhszaq9-vto3rAImL638L8MERMS60&e= 

The large hadrosauroid dinosaur Eolambia caroljonesa was named in honor of
Carol Jones, the discoverer of the place where the type specimens were
found. However, according to the article 31.1.2 of the ICZN, the form
caroljonesae should have been used and, thus, caroljonesa represents an
incorrect original spelling subject to a justified emendation. Such
emendation is required in cases on which the incorrect original spelling of
a species-group name must be corrected, as stated by the article 32.5.1 of
the ICZN. Therefore, based on the express application of the nomenclatural
rules, the name of the species must be corrected to Eolambia caroljonesae.

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Not yet mentioned. Can't find any content summary...

Ariana Paulina-Carabajal &  Mauro N. Nieto (2019)
Brief comment on the brain and inner ear of Giganotosaurus carolinii
(Dinosauria: Theropoda) based on CT scans.
Ameghiniana (advance online publication)
doi: 10.5710/AMGH.25.10.2019.3237
https://urldefense.proofpoint.com/v2/url?u=http-3A__www.ameghiniana.org.ar_index.php_ameghiniana_article_view_1001&d=DwIFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=c8fgNIsSnhV9eRB_FVB8q9uuQBTuwtQybknsT6KawhY&s=r1TNtOeyksfLARgFGsIRMcRLIJuvnIk_VtVO_zdxIPI&e=