Dinosaur egg deposits in the Cretaceous Gyeongsang Supergroup, Korea: Diversity and paleobiological implications

Paik, In Sung; Kim, Hyun Joo; Huh, Min

doi:10.1016/j.jseaes.2012.05.006

Cited by 29 publications

(20 citation statements)

References 42 publications

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“…The distribution of calcite and clay in both femora was investigated due to their abundance from the depositional environment and their supposed role in taphonomy31323334353651, and Fig. 5 illustrates the overall distribution trend of these phases.…”

Section: Resultsmentioning

confidence: 99%

“…This may explain the disparity in correlation of the microstructure and nanostructure. Presumably as a result of seasonal flooding3336, the right femur experienced subsequent burial by mud. Clay precipitation in bone likely originated from subsequent burials.…”

Section: Discussionmentioning

confidence: 99%

“…Here, we describe correlative structural investigations of the right (associated with KDRC-BB1) and left (associated with KDRC-BB3) femora of Koreanosaurus boseongensis 31 from the Late Cretaceous dinosaur nesting sites in Boseong County313233343536, South Korea to elucidate such assumptions (see Supplementary Table S1 for specimen details). Koreanosaurus was a small basal ornithopod that may have been fossorial based on the context of its discovery, suggested enlarged forelimb elements and pectoral girdle31, and comparisons with a fossorial ornithopod Oryctodromeus cubicularis from Montana, USA373839.…”

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confidence: 99%

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Disparities in correlating microstructural to nanostructural preservation of dinosaur femoral bones

Kim

Kwon

Lee

et al. 2017

Sci Rep

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Osteohistological researches on dinosaurs are well documented, but descriptions of direct correlations between the bone microstructure and corresponding nanostructure are currently lacking. By applying correlative microscopy, we aimed to verify that well-preserved osteohistological features correlate with pristine fossil bone nanostructures from the femoral bones of Koreanosaurus boseongensis. The quality of nanostructural preservation was evaluated based on the preferred orientation level of apatite crystals obtained from selected area electron diffraction (SAED) patterns and by measuring the “arcs” from the {100} and {002} diffraction rings. Unlike our expectations, our results revealed that well-preserved microstructures do not guarantee pristine nanostructures and vice versa. Structural preservation of bone from macro- to nanoscale primarily depends on original bioapatite density, and subsequent taphonomical factors such as effects from burial, pressure, influx of external elements and the rate of diagenetic alteration of apatite crystals. Our findings suggest that the efficient application of SAED analysis opens the opportunity for comprehensive nanostructural investigations of bone.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

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Disparities in correlating microstructural to nanostructural preservation of dinosaur femoral bones

Kim

Kwon

Lee

et al. 2017

Sci Rep

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“…In general, an accumulation of intact and closely associated dinosaur eggs is defined in literature as a fossil nest or clutch. Many authors used either or both of these terms to refer to an egg accumulation (e.g., Tandon et al, 1995;Cojan et al, 2003;Van Itterbeeck et al, 2004;Díaz-Molina et al, 2007;Grigorescu et al, 2010;Paik et al, 2012). However, other authors (Chiappe et al, 2004;Salgado et al, 2007;Vila et al, 2010) restricted the fossil nest definition to cases where there is clear evidence that an organism has laid eggs in a site suitable to ensure successful egg incubation and hatching.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Preservation of titanosaur egg clutches in Upper Cretaceous cumulative palaeosols (Los Llanos Formation, La Rioja, Argentina)

Basílici

Hechenleitner

Fiorelli

et al. 2017

Palaeogeography, Palaeoclimatology, Palaeoecology

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Studies of the palaeobiology of titanosaur eggs are significantly more common than studies of titanosaur-egg-bearing strata. Nevertheless, the latter provide significant insight into palaeoenvironmental conditions associated with the egg-laying behaviour. This study examines titanosaur-egg-bearing strata of the Upper Cretaceous Los Llanos Formation (La Rioja, Argentina) and relates them to the laying and preservation of titanosaur egg clutches. Los Llanos Formation is a predominantly sandstone succession throughout represented by palaeosol profiles. Five titanosaur egg clutches were recovered from the Bw horizon of an Inceptisol profile. This palaeosol type, named

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“…(Color figure available online.) Varricchio et al-Troodontid nest reuse (e932797-3) Early Jurassic site, thereby paralleling the overall density of the Mesozoic egg record (Paik et al, 2012). Only one site, Khermeen Tsav, Mongolia, involves eggs of theropods, Gobioolithus minor of likely enantiornithine birds (Mikhailov et al, 1994).…”

Section: Review Of Dinosaur Site Fidelitymentioning

confidence: 99%

Lay, brood, repeat: nest reuse and site fidelity in ecologic time for two Cretaceous troodontid dinosaurs

Varricchio

Jin

Jackson

2015

Journal of Vertebrate Paleontology

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Whereas 'biological site fidelity' refers to the regular reuse of a favored locale (e.g., breeding ground or nest) by an individual animal, 'paleontological site fidelity' typically refers to repeated use of a nesting locality by a herd or species over geologic time scales. Two new Cretaceous specimens from the Two Medicine Formation of Montana, U.S.A., and the Liantoutang Formation of Zhejiang, China, each preserve two closely superimposed clutches of the egg form Prismatoolithus. These eggs belong to the Troodontidae, small theropod dinosaurs sharing a close ancestry with Aves. In both specimens, eggs of a lower clutch are truncated at a level below what would normally preserve in an undisturbed hatched clutch. These traces differ from past examples of dinosaur site fidelity in (1) the close or cross-cutting relationship of the clutches, (2) the precise overlay of clutch atop clutch, and (3) the implication of nest reuse and, thus, site fidelity on an ecologic rather than geologic scale and at approximately the individual rather than species level. Given the likely extended occupation of troodontid nesting sites by attending adults, factors such as nesting success and territoriality may, in addition to favorable substrates, have influenced the behaviors recorded by these specimens. The arrangements of eggs as clutches within the geologic record represent trace fossils. Thus, they record past in situ behavior, providing important insight into dinosaur nesting. In addition, they can serve as independent indicators of substrate conditions and sedimentary history, potentially refining our understanding of paleoenvironments.

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Dinosaur egg deposits in the Cretaceous Gyeongsang Supergroup, Korea: Diversity and paleobiological implications

Cited by 29 publications

References 42 publications

Disparities in correlating microstructural to nanostructural preservation of dinosaur femoral bones

Disparities in correlating microstructural to nanostructural preservation of dinosaur femoral bones

Preservation of titanosaur egg clutches in Upper Cretaceous cumulative palaeosols (Los Llanos Formation, La Rioja, Argentina)

Lay, brood, repeat: nest reuse and site fidelity in ecologic time for two Cretaceous troodontid dinosaurs

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