Some recent (and not so recent) papers:
Highlights
The largest Europe Cenomanian concentration of macrovertebrates comes from Algora.
Recent fieldwork campaigns in Algora have provided numerous remains.
The faunal list of the site is updated here.
Information about the Early to Late Cretaceous faunal transition is provided.
This replacement is recognized as strongly conditioned by climate changes.
Abstract
The palaeontological area of Algora (Guadalajara Province, central Spain) provides the largest concentration of vertebrate macroremains for the Cenomanian of south-western Europe. The available faunal list for Algora, based on the analysis of scarce remains collected in geological surveys carried out more than thirty years ago, was never updated. Therefore, and despite the great potential of this site to reveal novel information about the composition of the vertebrate fauna from the base of the Upper Cretaceous in the continent, the previous determination of many of the taxa recognized there is recognized here as inaccurate or erroneous (e.g., the identification of two actinopterygian fishes, a single crocodyliform, the helochelydrid turtle Helochelys danubina and carcharodontosaurid dinosaurs). Recent fieldwork campaigns have provided numerous remains, including those of clades poorly represented so far, as well as others hitherto unknown at this site. The new faunal list proposed here included the lepisosteoid Obaichthys africanus, the helochelydrid aff. Plastremys lata, the pleurodiran Algorachelus peregrina, an indeterminate elasmosaurid, a non-eusuchian neosuchian and a eusuchian crocodyliform, a likely abelisaurid theropod and a lithostrotian sauropod. The study of these taxa provides new information about the palaeobiogeography and temporal distributions of some lineages, and increases knowledge about the poorly-known transition between the Lower and the Upper Cretaceous faunas in Europe. This faunal replacement, in which several well-represented lineages in the uppermost Cretaceous were established, is recognized as strongly conditioned by climate changes that took place between the end of the Early Cretaceous and the beginning of the Late Cretaceous.
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Chan-Gyu Yun (2020)
An exceptionally small juvenile Gorgosaurus libratus (Dinosauria Theropoda) specimen from the dinosaur Park Formation (Campanian) of Alberta.
The Mosasaur 11: 107-113
https://drive.google.com/file/d/1L5RS3D2QGycTTwUOzO8G5VKf7UIp_yjO/viewÂ
A distal end of theropod left metatarsal II from the Dinosaur Park Formation (Campanian) of Alberta is described. Despite its very small size, the specimen shows several autapomorphies of tyrannosaurids, particularly Gorgosaurus libratus Lambe 1914, and thus referable to this taxon. With estimated total length that is less than 300 mm, the specimen represents one of the smallest tyrannosaurid specimens known to date, and possibly a smallest Gorgosaurus libratus discovered so far. The morphology and its differences from the contemporaneous tyrannosaurid Daspletosaurus torosus indicate that juveniles of two Dinosaur Park tyrannosaurids may be easier to distinguish from one another than previously thought.
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Attila Åsi, MÃrton Szabà & GÃbor Botfalvai (2020)
Tanystropheus and other archosauromorph reptile remains from the Middle and Late Triassic of VillÃny (VillÃny Hills, Hungary).
Geologica Carpathica 71(3): 264 - 273
DOI:
https://doi.org/10.31577/GeolCarp.71.3.5http://www.geologicacarpathica.com/browse-journal/volumes/71-3/article-947/Tanystropheus and other possible archosauromorph fossils have been discovered from Middle to Upper Triassic shallow marine sedimentary sections in VillÃny (VillÃny Hills, southern Hungary). Four fragmentary cervical vertebrae can be assigned to Tanystropheus sp. based on characteristic features including the strongly elongate and hollow vertebral body with extremely reduced neural spine. Besides the cervicals, various teeth, classified into four different morphotypes including longitudinally striated, carinated and ziphodont ones, are thought to belong to archosauromorphs, since they markedly differ from the frequently found teeth of fish and sauropterygians. In addition, three enigmatic cranial bones that might represent some circumorbital elements, have been found as well, and are referred to here as Sauropsida indet. These fossils, originated from the same tectonic unit as those from the Anisian of Bihor (Romania), are of great importance for a better understanding of the poorly known semi-aquatic to terrestrial vertebrate fauna of the Middle to Late Triassic of central Europe
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Andrej ÄerÅanskÃ, Nicole Klein, Silvio Renesto, Jozef MichalÃk, Juraj Åurka & Michal Sentpetery (2020)
Here we describe the first skeletal evidence of a tetrapod from Rhaetian (Upper Triassic) marine deposits of the Western Carpathians. The material consists of an isolated left femur and comes from the ÃboÄka locality near ÄiÄmany in the StrÃÅov Highlands. Based on morphological, histological, and stratigraphic evidence, we can exclude affinities of this femur to the most commonly occurring aquatic reptiles: the Eosauropterygia. The histology of a femur of aff. Pachystropheus from Aust Cliff, Gloucestershire, UK, is also described here for the first time and compared to the bone from Slovakia. However, a precise taxonomical assignment of the Rhaetian femur from Slovakia is not possible. The bone shows strong osteosclerosis that points to an inhabitant of a shallow marine environment. On the basis of morphological and histological characters, affinities to a cyamodontoid placodont, Endennasaurus-like thalattosaur or a rhynchocephalian are conceivable. The morphology of the Slovak find does not fully exclude choristoderan affinity, but the rare histological data available for comparison do not support such a statement. For all these reasons, we allocated this bone as Diapsida indet. The bone described here sheds the first, although limited light on the possible faunal composition of the Rhaetian tetrapod assemblage in the Western Carpathians. We can assume that the bone, which shows marks of transport, either represents an allochthonous component in this marine environment, transported postmortem and most likely from nearby dry land (i.e., in the case of rhynchocephalian affinities), or it belonged to an inhabitant of this shallow coastal biotope (e.g., cyamodontoid placodont affinities).
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