Ben Creisler
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Also, a short supplement to another abstracts book already posted on the DML last year.Â
JORNADAS ARGENTINAS DE PALEONTOLOGÃA DE VERTEBRADOS LIBRO DE RESÃMENES
MEGALOSAURID AND ?SPINOSAURID (THEROPODA, TETANURAE) TEETH FROM THE LATE JURASSIC OF URUGUAY: BIOGEOGRAPHICAL IMPLICATIONS
M. SOTO1, D. PEREA1, AND P. TORIÃO1* 1
Instituto de Ciencias GeolÃgicas, Facultad de Ciencias, Universidad de la RepÃblica. Iguà 4225, 11600, Montevideo, Uruguay.
msoto@fcien.edu.uy;
perea@fcien.edu.uy;
paleopablo@gmail.com The Tacuarembà Formation (Late Jurassicâ?earliest Cretaceous, Uruguay) has recently yielded new theropod teeth, which represent the first confidently identified tetanuran remains from the unit. Most of them are large (near 80 mm high), slightly distally curved, moderately labiolingually compressed. The carinae show very coarse denticles (5â8 denticles/mm). The enamel is ornamented with apicobasal, submillimetrical ridges. This combination of characters is only found in megalosaurine megalosaurids. Megalosaurids have been rarely described from Gondwana but are instead a common component of Middle to Jurassic Laurasian assemblages. The occurrence of a megalosaurid, coherent with the results of multivariate analyses, is another evidence of a pre-Cretaceous age for the fossiliferous horizon of the Tacuarembà Formation. We also refer to Megalosauridae several teeth from the Late Jurassic of Tanzania. Thus, the family had a Pangean distribution. One single tooth fragment from a new locality is very different from the remaining teeth from the unit. It is mediumsized (ca. 20 mm in diameter), not labiolingually compressed. The carinae lack denticles. The enamel is ornamented with minute, apicobasal ridges not visible to the naked eye, which curve towards the carinae. This character combination suggest the tooth may belong to a spinosaurine spinosaurid. If confirmed, it would represent the oldest confident record of the family (we disagree with the referral of other Jurassic teeth to Spinosauridae). The Spinosaurinae are recorded so far in the midâCretaceous of Africa and Brazil. The theropod fauna of the Tacuarembà Formation was more diverse than previously known.Â
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Aratasaurus
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Dilophosaurus
The article says: "To help keep the research accessible to people on the Navajo Nation, Marsh says, The Journal of Paleontology agreed to waive its usual fee, making the paper free online for anyone who wants to read it."
Â
However, the paper is still paywalled when I last checked.
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Lusovenator
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Trierarchuncus
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JURASSIC DAYS (Carnegie Museum blog...)
SPECIMEN SCAVENGER HUNT
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TYRANNOSAURUS REX
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RTMP Behind the Scenes with FrancoisTherrien: Embryonic Hadrosaurs
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Brain of Sauron (in Italian)
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Who was the earliest dinosaur? (in Czech)
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So Much For 'Please Touch,' After COVID-19, Kids' Museums Will Be Less Hands-On
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Spring Hill Dinosaur-Shaped Building in Florida Set to Become National Landmark
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The Dodo in Life (what it really looked like...)
Tet Zoo
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Paleontologist Trevor Worthy is Mr. Moa: The man who handled almost every moa bone collected in New Zealand
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Whale, Dolphin, or Porpoise? A meaningful question about meaningless terms
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Biosignatures may reveal a wealth of new data locked inside old fossils
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Imperial College London addresses controversy over geologist and early paleontologist Henry de La Beche, a slaveholder--removes bust, changes names of prize and of society
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