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The first dinosaur egg from the Lower Cretaceous of Western Siberia, Russia

Published on Nov 5, 2017in Historical Biology1.49
· DOI :10.1080/08912963.2017.1396322
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)
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Abstract
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 eggshell 300–330 μm thick; angustiprismatic morphotype; eggshell with three different layers; gradual transition between mammillary layer and prismatic layer; abrupt contact between prismatic layer and external layer; mammillary layer to prismatic layer to external layer thickness ratio is 1:3:0.6; prismatic layer with ill-defined squamatic texture; angusticanaliculate pore system; and smooth outer surface. Like other Early Creataceous Prismatoolithus, the egg of Prismatoolithus ilekensis oosp. nov. was laid by a small ...
  • References (28)
  • Citations (4)
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References28
Newest
Published on Apr 1, 2017in Cretaceous Research2.12
Bernat Vila18
Estimated H-index: 18
,
Albert G. Sellés12
Estimated H-index: 12
,
Jean-Claude Beetschen6
Estimated H-index: 6
(Paul Sabatier University)
Abstract The fossil record of small-sized theropods in south-western Europe is scarce and fragmentary. In absence of more direct evidence, the oological record arises as an alternative source of information to infer biodiversity. In this regard, the controversial dinosaur eggshells from the Les Labadous locality in southern France are herein re-evaluated in the light of new material and current parataxonomic information. New data and analyses reveal a new eggshell type, Montanoolithus labadousen...
Published on Jul 3, 2016in Historical Biology1.49
Albert G. Sellés12
Estimated H-index: 12
,
Àngel Galobart19
Estimated H-index: 19
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 t...
Published on May 3, 2016in Journal of Vertebrate Paleontology1.74
Daniel R. Lawver5
Estimated H-index: 5
(AMNH: American Museum of Natural History),
Xingsheng Jin6
Estimated H-index: 6
(AMNH: American Museum of Natural History)
+ 1 AuthorsQiongying Wang1
Estimated H-index: 1
ABSTRACTMesozoic avian eggs are rare, especially from the mid-Cretaceous basins of Zhejiang Province, China. Here we report an avian egg from the Lower Cretaceous (Albian) Liangtoutang Formation. The specimen (JYM F0033) measures 50 mm × 32 mm and the 166-µm-thick eggshell consists of three structural layers of calcite. The mammillary layer (ML) and overlying continuous layer (CL) each measure approximately 46 µm, whereas the outermost, external layer (EL) measures 74 µm. Ratios of these layers ...
Published on Jan 1, 2016in Cretaceous Research2.12
Kohei Tanaka5
Estimated H-index: 5
(U of C: University of Calgary),
Darla K. Zelenitsky15
Estimated H-index: 15
(U of C: University of Calgary)
+ 3 AuthorsFrançois Therrien16
Estimated H-index: 16
(Royal Tyrrell Museum)
Abstract The Lower Cretaceous (Albian) Sasayama Group in the Hyogo Prefecture of southwestern Japan has yielded various vertebrate fossils, including skeletal remains of dinosaurs, anurans, lizards, and mammals, and recently eggshell fragments. Here we report on numerous fossil eggshells from the bone-bearing Kamitaki locality in Tamba City, which represents a diverse dinosaur eggshell assemblage. Of the more than 90 eggshell fragments recovered, five different types were identified, including e...
Published on Nov 17, 2015in Historical Biology1.49
Takuya Imai2
Estimated H-index: 2
(Fukui Prefectural University),
Yoichi Azuma14
Estimated H-index: 14
(Fukui Prefectural Dinosaur Museum)
Fossil record of Early Cretaceous birds may be geographically biased, and eggs and eggshells predating the Late Cretaceous were unknown. Here, we report the oldest known bird eggshell (FPDM-V-0009175) collected from the upper Barremian Kitadani Formation in Katsuyama City, Fukui, Japan. The Kitadani Formation likely represents fluvial environments. Thin-section and scanning electron microscope analyses revealed diagnostic characters of FPDM-V-0009175, including thin (0.44 mm) shell, smooth exter...
Published on Jun 1, 2015in PLOS ONE2.78
David J. Varricchio28
Estimated H-index: 28
(MSU: Montana State University),
Amy M. Balanoff15
Estimated H-index: 15
(SBU: Stony Brook University),
Mark A. Norell57
Estimated H-index: 57
(AMNH: American Museum of Natural History)
Embryonic remains within a small (4.75 by 2.23 cm) egg from the Late Cretaceous, Mongolia are here re-described. High-resolution X-ray computed tomography (HRCT) was used to digitally prepare and describe the enclosed embryonic bones. The egg, IGM (Mongolian Institute for Geology, Ulaanbaatar) 100/2010, with a three-part shell microstructure, was originally assigned to Neoceratopsia implying extensive homoplasy among eggshell characters across Dinosauria. Re-examination finds the forelimb signif...
Published on May 1, 2015in Cretaceous Research2.12
Alexander O. Averianov23
Estimated H-index: 23
(Tomsk State University),
A. V. Lopatin11
Estimated H-index: 11
(RAS: Russian Academy of Sciences)
Four mammalian taxa have been identified based on upper molariform tooth and edentulous dentary fragments from the Bol'shoi Terekhtyul' locality of the Lower Cretaceous Ilek Formation (Krasnoyarsk Territory, Russia): Docodonta indet., Amphidontidae indet., Zhangheotheria indet. sp. A and sp. B. The docodontan from Bol'shoi Terekhtyul is smaller than Sibirotherium rossicum from the Ilek Formation at Shestakovo 1 locality (Kemerovo Province, Russia) and may belong to a distinct taxon. It is one of...
Published on May 1, 2015in Doklady Biological Sciences
A. V. Lopatin11
Estimated H-index: 11
(RAS: Russian Academy of Sciences),
E. N. Mashchenko4
Estimated H-index: 4
(RAS: Russian Academy of Sciences)
+ 3 AuthorsE. A. Kuzmina1
Estimated H-index: 1
(AMNH: American Museum of Natural History)
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 Apr 16, 2014in Journal of Vertebrate Paleontology1.74
Jingmai K O'Connor1
Estimated H-index: 1
(Tomsk State University),
Alexander O. Averianov23
Estimated H-index: 23
(Tomsk State University),
N. V. Zelenkov10
Estimated H-index: 10
(RAS: Russian Academy of Sciences)
ABSTRACTWe describe a new isolated tarsometatarsus from the Early Cretaceous (Barremian-Aptian) Ilek Formation Shestakovo-3 locality in western Siberia. The new specimen represents a new taxon, Evgenavis nobilis, gen. et sp. nov., significantly increasing the Mesozoic avifauna from Russia. The specimen shares morphologies with a number of basal ornithothoracine taxa, but shows most similarity to the basal pygostylian Confuciusornis sanctus, the oldest known beaked bird and most common taxon from...
Cited By4
Newest
Published on Jun 1, 2019in Cretaceous Research2.12
Seung Im Choi3
Estimated H-index: 3
(SNU: Seoul National University),
Yuong-Nam Lee14
Estimated H-index: 14
(SNU: Seoul National University)
Abstract Among non-avian maniraptoran eggshells, oofamilies Prismatoolithidae and Elongatoolithidae are usually associated with troodontid and oviraptorosaur dinosaurs, respectively. However, dromaeosaurid eggshells are poorly known so far except for one possible Deinonychus egg associated with the gastralia of Deinonychus . Since then, some Deinonychus eggshell-like non-prismatoolithid and non-elongatoolithid maniraptoran eggshells have been reported including oogenera Reticuloolithus and Monta...
Published on May 17, 2019in Palaeontology2.63
Seung Im Choi3
Estimated H-index: 3
(SNU: Seoul National University),
Seung Ho Choi18
Estimated H-index: 18
(SNU: Seoul National University)
+ 0 AuthorsYuong-Nam Lee14
Estimated H-index: 14
(SNU: Seoul National University)
Published on Apr 30, 2018
A. V. Podlesnov (RAS: Russian Academy of Sciences), B. I. Morkovin (RAS: Russian Academy of Sciences), E. N. Maschenko (RAS: Russian Academy of Sciences)
Published on Apr 1, 2018in Canadian Journal of Earth Sciences1.42
Gregory F. Funston7
Estimated H-index: 7
(U of A: University of Alberta),
Philip J. Currie50
Estimated H-index: 50
(U of A: University of Alberta)
Abstract—Eggs and eggshell are generally rare in the Upper Cretaceous rocks of Alberta, despite being relatively abundant nearby in Montana. Palaeontologists and other people have been prospecting the Horseshoe Canyon Formation for more than a 130 years, but eggshell fragments have only just been recovered. The fragments are unornamented with angusticanaliculate pores and three structural layers. Numerous features support their referral to Prismatoolithus levis, and they confirm the presence of ...