Blasisaurus canudoi gen. et sp. nov., a new lambeosaurine dinosaur (Hadrosauridae) from the Latest Cretaceous of Arén (Huesca, Spain)

2010 ◽  
Vol 47 (12) ◽  
pp. 1507-1517 ◽  
Author(s):  
Penelope Cruzado-Caballero ◽  
Xabier Pereda-Suberbiola ◽  
J. Ignacio Ruiz-Omeñaca
Keyword(s):  
Phylogenetic Analysis ◽  
Late Cretaceous ◽  
Junior Synonym ◽  
Posterior Process ◽  
South Central ◽  
Lower Jaw ◽  
Dorsal Edge ◽  
Dispersal Events ◽  
Central Pyrenees

Blasisaurus canudoi gen. et sp. nov. is described on the basis of disarticulated skull and lower jaw remains found in the Blasi 1 locality of Arén (Huesca, south-central Pyrenees of Spain), located in the upper part of the Arén Formation, late Maastrichtian in age. This new lambeosaurine hadrosaurid is characterized by a jugal combining a hook-like dorsal edge of the posterior process and a narrow, D-shaped infratemporal fenestra. Blasisaurus differs from Arenysaurus from the Blasi 3 site of Arén mainly by the absence of secondary ridges in the dentary teeth, and from Koutalisaurus (probably a junior synonym of Pararhabdodon ) from the Isona region of Lleida by the anteriormost portion of the dentary that is modestly deflected ventrally. A phylogenetic analysis places Blasisaurus as closely related to Arenysaurus in a clade of basal lambeosaurines more derived than Tsintaosaurus and Jaxartosaurus ; this clade forms part of a polytomy with Amurosaurus and with more derived lambeosaurines. Palaeobiogeographically, the presence of Blasisaurus and other hadrosaurids in the Maastrichtian European archipelago suggests one or, more probably, a series of dispersal events from Asia across intermittent land bridges during the second half of the Late Cretaceous.

Sediment provenance and routing evolution in the Late Cretaceous–Eocene Ager Basin, south‐central Pyrenees, Spain

2019 ◽  
Vol 32 (3) ◽  
pp. 485-504 ◽  
Author(s):  
Kelly D. Thomson ◽  
Daniel F. Stockli ◽  
Margaret L. Odlum ◽  
Pauline Tolentino ◽  
Cai Puigdefàbregas ◽  
...  
Keyword(s):  
Late Cretaceous ◽  
Sediment Provenance ◽  
South Central ◽  
Central Pyrenees

scholarly journals The smallest known Devonian tetrapod shows unexpectedly derived features

2020 ◽  
Vol 7 (4) ◽  
pp. 192117 ◽  
Author(s):  
Per E. Ahlberg ◽  
Jennifer A. Clack
Keyword(s):  
Phylogenetic Analysis ◽  
Mass Extinction ◽  
Phase Contrast ◽  
New Genus ◽  
New Genus And Species ◽  
East Greenland ◽  
Posterior Process ◽  
Lower Jaw ◽  
Synchrotron Microtomography

A new genus and species of Devonian tetrapod, Brittagnathus minutus gen. et sp. nov., is described from a single complete right lower jaw ramus recovered from the Acanthostega mass-death deposit in the upper part of the Britta Dal Formation (upper Famennian) of Stensiö Bjerg, Gauss Peninsula, East Greenland. Visualization by propagation phase contrast synchrotron microtomography allows a complete digital dissection of the specimen. With a total jaw ramus length of 44.8 mm, Brittagnathus is by far the smallest Devonian tetrapod described to date. It differs from all previously known Devonian tetrapods in having only a fang pair without a tooth row on the anterior coronoid and a large posterior process on the posterior coronoid. The presence of an incipient surangular crest and a concave prearticular margin to the adductor fossa together cause the fossa to face somewhat mesially, reminiscent of the condition in Carboniferous tetrapods. A phylogenetic analysis places Brittagnathus crownward to other Devonian tetrapods, adjacent to the Tournaisian genus Pederpes . Together with other recent discoveries, it suggests that diversification of ‘Carboniferous-grade’ tetrapods had already begun before the end of the Devonian and that the group was not greatly affected by the end-Devonian mass extinction.

scholarly journals Vertebrate Succession from Late Cretaceous to Early Tertiary, South-Central Pyrenees (Lleida, Spain)

1996 ◽  
Vol 8 ◽  
pp. 246-246 ◽  
Author(s):  
Nieves López-Martínez ◽  
María A. ÁLvarez-Sierra ◽  
Remmert Daams ◽  
Pablo Peláez-Campomanes ◽  
Paloma Sevilla
Keyword(s):  
Late Cretaceous ◽  
South Central ◽  
Early Tertiary ◽  
Central Pyrenees

Timing of magnetization and vertical-axis rotations of the Cotiella massif (Late Cretaceous, South Central Pyrenees)

2015 ◽  
Vol 425 (1) ◽  
pp. 213-232 ◽  
Author(s):  
Miguel Garcés ◽  
Jesús García-Senz ◽  
Josep Antón Muñoz ◽  
Berta López-Mir ◽  
Elisabet Beamud
Keyword(s):  
Late Cretaceous ◽  
Vertical Axis ◽  
South Central ◽  
Central Pyrenees

scholarly journals An enigmatic specialized new eutherian mammal from the Late Cretaceous of Western Europe (Northern Pyrenees)

2021 ◽  
Author(s):  
Emmanuel GHEERBRANT ◽  
Dominique TEODORI
Keyword(s):  
Phylogenetic Analysis ◽  
Late Cretaceous ◽  
Fossil Record ◽  
Western Europe ◽  
Eutherian Mammal ◽  
Additional Material ◽  
Weak Support ◽  
Lower Jaw ◽  
Early Specialization

We report the discovery of a new Late Cretaceous eutherian mammal, Azilestes ragei n. gen., n. sp. from the Mas-d’Azil northern Pyrenean site (France), which is among the largest known. It is only known from a broken lower jaw found in uppermost levels of the Grès de Labarre Formation (early Maastrichtian). Despite its poor preservation, it displays distinctive specialized features with respect to known Cretaceous eutherians. This includes a reduced premolar formula and shortened and robust jaw, an incipient hypolophid, and a cingular-like postcristid and hypoconulid. The phylogenetic analysis suggests indeed a possible stem relationship between Azilestes n. gen. and some clades of herbivorous Cenozoic placentals, but with weak support. Several molar features reminiscent of the Zhelestidae, especially Valentinella Tabuce, Vianey-Liaud & Garcia, 2004, support instead that Azilestes n. gen. is a basal eutherian showing early specialization in a herbivorous diet convergent with some crown placentals. Whatever the suprageneric position of Azilestes n. gen., which remains to be clarified with additional material, its discovery highlights a significant diversity of European Cretaceous eutherians in contrast to their very poor fossil record.

Palynological characterization of a transgressive episode in transitional deposits in the Cretaceous Aren and Tremp formations (south-central Pyrenees, Spain)

2012 ◽  
Vol 266 (2) ◽  
pp. 159-172 ◽  
Author(s):  
Angélica Torices ◽  
María-Teresa Fernández-Marrón ◽  
Fernando Fonollá ◽  
Nieves López-Martínez
Keyword(s):  
South Central ◽  
Central Pyrenees
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