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Reassessing the endemic European Upper Cretaceous dinosaur egg Cairanoolithus

Published on Jul 3, 2016in Historical Biology1.49
· DOI :10.1080/08912963.2014.998666
Albert G. Sellés12
Estimated H-index: 12
,
Àngel Galobart19
Estimated H-index: 19
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Abstract
The fossil record of dinosaur eggs and eggshells from the uppermost Cretaceous strata of south-western Europe is composed of both worldwide-distributed and endemic egg types. In this study, we are reviewing the enigmatic European oogenus Cairanoolithus, which after analysing abundant material from classic and new localities it is reassigned to a new oofamily (Cairanoolithidae oofam. nov.) in the light of the unique combination of structural characters. The new oofamily includes one oogenus and two oospecies. Cairanoolithid eggs share several features with other ornithopod egg types indeed. Furthermore, our phylogenetic analysis places Cairanoolithus as the sister ootaxon of the ornithopod ootaxa, being considered the most basal ornithischian egg type known so far. Although neither embryonic nor bones remains are known in association with cairanoolithid eggs so far, several taxonomic attributions have been proposed for this egg type over time. On the basis of microstructural features, phylogenetic results ...
  • References (70)
  • Citations (5)
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References70
Newest
Published on Feb 17, 2015in Historical Biology1.49
Mariela Soledad Fernández8
Estimated H-index: 8
(CONICET: National Scientific and Technical Research Council),
Ashu Khosla15
Estimated H-index: 15
(Panjab University, Chandigarh)
The eggshell oospecies from India and Argentina are compared and reviewed in detail. These eggshells resemble each other in having a nodular outer surface ornamentation and clearly arched growth lines of the shell units. Microstructurally, the eggshell oospecies belonging to the oofamily Megaloolithidae shows fan-like shell units, which are sharply separated from each other throughout the thickness of the eggshell and can be traced up to the surface of the eggshell. Comparisons between four oosp...
Published on Jan 2, 2015in Historical Biology1.49
M. Marzola3
Estimated H-index: 3
,
João Russo2
Estimated H-index: 2
,
Octávio Mateus23
Estimated H-index: 23
Eggshells from the three extant crocodilian species Crocodylus mindorensis (Philippine Crocodile), Paleosuchus palpebrosus (Cuvier's Smooth-fronted Caiman or Musky Caiman) and Alligator mississippiensis (American Alligator or Common Alligator) were prepared for thin section and scanning electron microscope analyses and are described in order to improve the knowledge on crocodilian eggs anatomy and microstructure, and to find new apomorphies that can be used for identification. Both extant and fo...
Published on Jan 1, 2015in Journal of Iberian Geology0.93
Bernat Vila18
Estimated H-index: 18
(University of Zaragoza),
Albert G. Sellés12
Estimated H-index: 12
Since the beginning of the 20th Century the Upper Cretaceous continental and transitional marine deposits of the southern Pyrenees have produced more than 220 dinosaur fossil localities. New discoveries and advances in magnestostratigraphy and biostratigraphy provide a robust biostratigraphical framework for the latest Cretaceous dinosaur faunas in the region, although the age of some localities has remained uncertain. Here, we re-evaluate the age of some classic and new dinosaur fossil localiti...
Published on Sep 1, 2014in Cretaceous Research2.12
Miguel Moreno-Azanza11
Estimated H-index: 11
(University of Zaragoza),
José Ignacio Canudo19
Estimated H-index: 19
(University of Zaragoza),
José Manuel Gasca8
Estimated H-index: 8
(University of Zaragoza)
Abstract Early Cretaceous spheroolithid eggshells have always been extremely scarce, unlike their putative egg layers, ornithopod dinosaurs, which are ubiquitous in Early Cretaceous ecosystems. In this paper, we re-evaluate eggshells previously assigned to the oofamily Elongatoolithidae, an oofamily related to derived theropod dinosaurs (including maniraptorans and oviraptorids), and reassign them to the oofamily Spheroolithidae, on the basis of the lack of a squamatic ultrastructure, and the pr...
Published on May 1, 2014in Cretaceous Research2.12
Albert G. Sellés12
Estimated H-index: 12
,
Bernat Vila18
Estimated H-index: 18
(University of Zaragoza),
Àngel Galobart19
Estimated H-index: 19
Abstract The scarcity of diagnostic skeletal elements in the latest Cretaceous theropod record of the Ibero-Armorican domain (southwestern Europe) prevents to perform accurate phylogenetic, paleobiogeographic, and diversity studies. In contrast, eggs and eggshells of theropod dinosaurs are relatively abundant and well known in this region from which several ootaxa have been described. Here, we describe the first Late Maastrichtian theropod ootaxon ( Prismatoolithus trempii oosp. nov.) from SW Eu...
Published on Mar 4, 2014in Historical Biology1.49
Miguel Moreno-Azanza11
Estimated H-index: 11
(University of Zaragoza),
Blanca Bauluz16
Estimated H-index: 16
(University of Zaragoza)
+ 2 AuthorsAlbert G. Sellés12
Estimated H-index: 12
The Upper Cretaceous outcrops of the Pyrenees yield one of the most extensive and continuous records of paleoological remains anywhere in the world. Most of eggs and eggshells have been referred to the oofamily Megaloolithidae. In this study, we present a revision of eggshell fragments from the Blasi 2 locality, lattermost Maastrichtian in age, previously assigned to aff. Megaloolithidae. The presence of a blocky extinction pattern and basal knobs supports a crocodilian affinity of these materia...
Published on Dec 2, 2013in PLOS ONE2.78
James I. Kirkland19
Estimated H-index: 19
(Utah Geological Survey),
L Alcalá-Martínez20
Estimated H-index: 20
+ 3 AuthorsJelle P. Wiersma1
Estimated H-index: 1
(UofU: University of Utah)
Nodosaurids are poorly known from the Lower Cretaceous of Europe. Two associated ankylosaur skeletons excavated from the lower Albian carbonaceous member of the Escucha Formation near Arino in northeastern Teruel, Spain reveal nearly all the diagnostic recognized character that define nodosaurid ankylosaurs. These new specimens comprise a new genus and species of nodosaurid ankylosaur and represent the single most complete taxon of ankylosaur from the Cretaceous of Europe. These two specimens we...
Published on Dec 1, 2013in Scientific Reports4.01
Ricardo Araújo10
Estimated H-index: 10
,
R Castanhinha6
Estimated H-index: 6
+ 5 AuthorsL. C. Alves1
Estimated H-index: 1
The non-avian saurischians that have associated eggshells and embryos are represented only by the sauropodomorph Massospondylus and Coelurosauria (derived theropods), thus missing the basal theropod representatives. We report a dinosaur clutch containing several crushed eggs and embryonic material ascribed to the megalosaurid theropod Torvosaurus. It represents the first associated eggshells and embryos of megalosauroids, thus filling an important phylogenetic gap between two distantly related g...
Published on Aug 1, 2013in Cretaceous Research2.12
Attila Ősi16
Estimated H-index: 16
(MTA: Hungarian Academy of Sciences),
Edina Prondvai5
Estimated H-index: 5
(MTA: Hungarian Academy of Sciences)
Abstract A complete and well-preserved right ankylosaurian humerus from the Upper Cretaceous (Santonian) Csehbanya Formation of Iharkut, western Hungary is described here. Based on its osteological features and 21.5 cm adult length, the new specimen is markedly different from the slender humerus of Hungarosaurus , the previously known ankylosaur from the locality, and more similar to that of Struthiosaurus . Thus, the new Hungarian specimen is tentatively assigned here to cf. Struthiosaurus ther...
Cited By5
Newest
Published on Nov 5, 2017in Historical Biology1.49
Pavel P. Skutschas13
Estimated H-index: 13
(SPbU: Saint Petersburg State University),
Valentina D. Markova1
Estimated H-index: 1
+ 4 AuthorsAlexander O. Averianov23
Estimated H-index: 23
(RAS: Russian Academy of Sciences)
AbstractThe Lower Cretaceous Ilek Formation in Western Siberia (Russia) has yielded various vertebrate fossils, including skeletal remains of dinosaurs. Here we report on a fragmentary theropod egg from the vertebrate locality Shestakovo 3 of the Ilek Formation in Kemerovo Province. We assign the specimen to the oogenus Prismatoolithus (oofamily Prismatoolithidae) as Prismatoolithus ilekensis oosp. nov., on the basis of the following unique combination of characters: ovoid-shaped egg; thin eggsh...
Published on Apr 1, 2019in Earth-Science Reviews9.53
Víctor Fondevilla8
Estimated H-index: 8
(Autonomous University of Barcelona),
V. Riera (Centro de Estudios y Experimentación de Obras Públicas)+ 6 AuthorsÀngel Galobart19
Estimated H-index: 19
Abstract In south-western Europe, the uppermost Cretaceous continental deposits in the different sedimentary basins of Iberia (Portugal and north and central Spain), the Pyrenees (Spain and France) as well as Languedoc and Provence (southern France) provide one of the few terrestrial records that allow a comprehensive study of the Campanian-Maastrichtian dinosaur assemblages. For the last years the southern Pyrenees has been the target of intense geological, palaeontological and geochronological...
Published on Jan 1, 2016in Cretaceous Research2.12
Víctor Fondevilla8
Estimated H-index: 8
(Autonomous University of Barcelona),
Jaume Dinarès-Turell30
Estimated H-index: 30
+ 4 AuthorsÀngel Galobart19
Estimated H-index: 19
Abstract The first detailed stratigraphic succession of the Upper Cretaceous continental record from the Upper Aude Valley (southern France) is presented together with a magnetostratigraphic study. The combined stratigraphy and magnetostratigraphy of the Marnes rouges inferieures Fm (Lower Red Marls), constrained by biochronological markers such as charophyte occurrence and revised dinosaur eggshells, results in a succession of fluvial red beds dated from chron C32n to the top of chron C31r. It ...
Published on Nov 25, 2015in PLOS ONE2.78
Kohei Tanaka5
Estimated H-index: 5
(U of C: University of Calgary),
Darla K. Zelenitsky7
Estimated H-index: 7
(U of C: University of Calgary),
François Therrien16
Estimated H-index: 16
(Royal Tyrrell Museum)
Knowledge about the types of nests built by dinosaurs can provide insight into the evolution of nesting and reproductive behaviors among archosaurs. However, the low preservation potential of their nesting materials and nesting structures means that most information can only be gleaned indirectly through comparison with extant archosaurs. Two general nest types are recognized among living archosaurs: 1) covered nests, in which eggs are incubated while fully covered by nesting material (as in cro...