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An avian egg from the Lower Cretaceous (Albian) Liangtoutang Formation of Zhejiang Province, China

Published on May 3, 2016in Journal of Vertebrate Paleontology1.74
· DOI :10.1080/02724634.2016.1100631
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
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Abstract
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 are ML:CL:EL = 1:1:1.6. An external layer that exceeds the thickness of the continuous layer represents an autapomorphy of this new egg type, which we herein establish as Pachycorioolithus jinyunensis oogen. et oosp. nov. within Pachycorioolithidae oofam. nov. Documentation of eggshell features and their first occurrence in the fossil record provides phylogenetically important information that may potentially aid in clarifying the evolution of avian reproduction and biology.http://zoobank.org/urn:lsid:zoobank.org:p...
  • References (45)
  • Citations (6)
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References45
Newest
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 Oct 2, 2014in Alcheringa1.02
Júlio C. A. Marsola3
Estimated H-index: 3
,
Gerald Grellet-Tinner14
Estimated H-index: 14
+ 3 AuthorsMax C. Langer24
Estimated H-index: 24
Marsola, J.C.A., Grellet-Tinner, G., Montefeltro, F.C., Sayao, J.M., Hsiou, A.S. & Langer, M.C., 2014. The first fossil avian egg from Brazil. Alcheringa 38, 563–567. ISSN 0311-5518.In contrast to the rich record of eggs from non-avian dinosaurs, complete eggs attributable to Mesozoic birds are relatively scarce. Nevertheless, several well-preserved specimens have been discovered over the last three decades revealing functional and phylogenetic characters that shed light on the breeding strategi...
Published on Mar 4, 2014in Historical Biology1.49
Konstantin E. Mikhailov3
Estimated H-index: 3
(RAS: Russian Academy of Sciences)
Different aspects of using eggshell structure in description of fossil eggs and in phylogenetic analysis are critically discussed. One of the lines of discussion is that correct identification of the so-called squamatic ultrastructure (important feature of the spongy layer in ornithoid type of eggshell) is a key point for the results of the analysis. The complex biocrystalline nature of the so-called squamatic ultrastructure is under particular consideration. The other line concerns the use of p...
Published on Jan 1, 2014in Acta Palaeontologica Polonica1.64
David J. Varricchio28
Estimated H-index: 28
,
Daniel E. Barta3
Estimated H-index: 3
In 1991, Sabath described “larger avian eggs” from the Upper Cretaceous Barun Goyot and Djadokhta Formations of Mongolia. These were later included in the ootaxon Gobioolithus major. Here we recognize the larger avian eggs of Sabath as a distinct ootaxon, Styloolithus sabathi, oogen. et oosp. nov. These eggs differ from those of Gobioolithus in being larger (70 by 32 mm) and more elongate. Microscopically, the shell bears a third layer (possible external zone) thicker than the mammillary layer a...
Published on Dec 1, 2013in Paleontological Journal0.72
E. N. Kurochkin10
Estimated H-index: 10
(RAS: Russian Academy of Sciences),
S. Chatterjee1
Estimated H-index: 1
(Museum of Texas Tech University),
K. E. Mikhailov1
Estimated H-index: 1
(RAS: Russian Academy of Sciences)
Enantiornithes is the most speciose clade of Cretaceous birds, but many taxa are known from isolated postcranial skeletons. Two embryonic enantiornithine bird skeletons of Gobipipus reshetovi gen. et sp. nov. from the Upper Cretaceous (Campanian) Barun Goyot Formation of the Gobi Desert in Mongolia provide new insights into the anatomy, radiation, and mode of development of early avialans. In recent times, both enantiornithine and ornithuromorph birds are known from the Barun Goyot Formation as ...
Published on Sep 1, 2013in Journal of Vertebrate Paleontology1.74
Frankie D. Jackson19
Estimated H-index: 19
(MSU: Montana State University),
David J. Varricchio28
Estimated H-index: 28
(MSU: Montana State University),
Joseph A. Corsini5
Estimated H-index: 5
(Eastern Oregon University)
ABSTRACT Partial eggs from the Eocene Willwood Formation of Wyoming contain unidentifiable embryonic remains; the eggs are referable to a theropod on the basis of their structural layering of calcite and to an avian theropod because of their Eocene age. We assign the specimens to the oofamily Medioolithidae as Microolithus wilsoni, oogen. et oosp. nov., on the basis of the following unique combination of characters: 600-µm-thick eggshell composed of three structural layers; abrupt and undulating...
Published on Apr 17, 2013in PLOS ONE2.78
Mariela Soledad Fernández8
Estimated H-index: 8
(CONICET: National Scientific and Technical Research Council),
Rodolfo A. García13
Estimated H-index: 13
+ 5 AuthorsGareth J. Dyke28
Estimated H-index: 28
(NOC: National Oceanography Centre)
We report the first evidence for a nesting colony of Mesozoic birds on Gondwana: a fossil accumulation in Late Cretaceous rocks mapped and collected from within the campus of the National University of Comahue, Neuquen City, Patagonia (Argentina). Here, Cretaceous ornithothoracine birds, almost certainly Enanthiornithes, nested in an arid, shallow basinal environment among sand dunes close to an ephemeral water-course. We mapped and collected 65 complete, near-complete, and broken eggs across an...
Published on Mar 1, 2013in Cretaceous Research2.12
Yoichi Azuma14
Estimated H-index: 14
(AMNH: American Museum of Natural History),
Junchang Lü18
Estimated H-index: 18
+ 4 AuthorsWenjie Zheng3
Estimated H-index: 3
(AMNH: American Museum of Natural History)
Abstract A new Cretaceous bird ichnotaxon, Dongyangornipes sinensis ichnogen. et ichnosp. nov., is described. It is the first record of a webbed bird footprint in China. It was recovered from the early Late Cretaceous Jinhua Formation in Dongyang City, Zhejiang Province. It is characterized by comparatively small tridactyl footprints with a notably developed web structure without a hallux impression. The web impression of digits II–III is connected from the apex of digit II to the posterior thir...
Published on Jan 1, 2013in Paleobiology2.35
David J. Varricchio28
Estimated H-index: 28
(MSU: Montana State University),
Frankie D. Jackson19
Estimated H-index: 19
(MSU: Montana State University)
+ 1 AuthorsDarla K. Zelenitsky15
Estimated H-index: 15
(U of C: University of Calgary)
Abstract Using tangential thin sections, we examined variation in porosity and water vapor conductance across two eggs of Troodon formosus, a small (∼50 kg) theropod dinosaur from the North American Upper Cretaceous, testing two hypotheses of egg incubation: (1) full burial within sediments or vegetation and (2) partial burial with exposed upper egg portions. We divided and sampled the eggs in five zones, 1 through 5 from blunt top to more pointed bottom. A geometric model composed of a hemisphe...
Cited By6
Newest
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 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 Dec 1, 2018in Scientific Reports4.01
Wenjie Zheng3
Estimated H-index: 3
,
Xingsheng Jin6
Estimated H-index: 6
(AMNH: American Museum of Natural History)
+ 3 AuthorsXing Xu41
Estimated H-index: 41
(CAS: Chinese Academy of Sciences)
The tail club knob is a highly specialized structure thought to characterize a subgroup of the ankylosaurine ankylosaurians, and the oldest documented tail club knob in the fossil record occurred in the Campanian ankylosaurine Pinacosaurus. Here we report a new ankylosaurid Jinyunpelta sinensis, gen. et sp. nov., from the Albian–Cenomanian Liangtoutang Formation, Jinyun County, Zhejiang, China. This is the first definitive and the best preserved ankylosaurid dinosaur ever found in southern China...
Published on May 1, 2018in Cretaceous Research2.12
Ana Bravo5
Estimated H-index: 5
(CSIC: Spanish National Research Council),
Paloma Sevilla9
Estimated H-index: 9
(Complutense University of Madrid),
Fernando Barroso-Barcenilla10
Estimated H-index: 10
(Complutense University of Madrid)
The new upper Barremian microfossil site of Vadillos-1 (Lower Cretaceous, Beteta Gorges, Cuenca province, Spain) has yielded a rich fossil assemblage consisting of numerous eggshell fragments along with diverse skeletal remains of fishes, amphibians, turtles, crocodyliforms and dinosaurs. Crocodilian eggshells constitute the main fraction of the eggshell assemblage which includes abundant material belonging to the oofamily Krokolithidae, as well as a new type of crocodilian eggshells (Neokrokoli...
Published on May 1, 2018in Journal of Evolutionary Biology2.54
D. Charles Deeming15
Estimated H-index: 15
(University of Lincoln),
Gerald Mayr32
Estimated H-index: 32
(AMNH: American Museum of Natural History)
Numerous new fossils have driven an interest in reproduction of early birds, but direct evidence remains elusive. No Mesozoic avian eggs can be unambiguously assigned to a species, which hampers our understanding of the evolution of contact incubation, which is a defining feature of extant birds. Compared to living species, eggs of Mesozoic birds are relatively small, but whether the eggs of Mesozoic birds could actually have borne the weight of a breeding adult has not yet been investigated. We...
Published on Oct 1, 2016in The Auk2.66
David J. Varricchio28
Estimated H-index: 28
(MSU: Montana State University),
Frankie D. Jackson19
Estimated H-index: 19
(MSU: Montana State University)
ABSTRACT The reproductive biology of living birds differs dramatically from that of other extant vertebrates. Although some attributes of modern avian reproduction had their origin within theropod dinosaurs like oviraptors and troodontids, even the most derived non-avian theropods lack key features of modern birds. We review the current knowledge of reproduction in Mesozoic birds and 3 lines of evidence that contribute to our understanding of the evolution of the modern avian reproductive mode: ...
View next paperReidentification of Avian Embryonic Remains from the Cretaceous of Mongolia