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Csiki-Sava Z, Vremir M, Meng J, Vasile Ş, Brusatte SL, Norell MA. Spatial and Temporal Distribution of the Island-Dwelling Kogaionidae (Mammalia, Multituberculata) in the Uppermost Cretaceous of Transylvania (Western Romania). BULLETIN OF THE AMERICAN MUSEUM OF NATURAL HISTORY 2022. [DOI: 10.1206/0003-0090.456.1.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- Zoltán Csiki-Sava
- Laboratory of Paleontology, Faculty of Geology and Geophysics, and Center for Risk Studies, Space Modeling and Dynamics of Terrestrial and Coastal Systems, University of Bucharest
| | - Mátyás Vremir
- Deceased; formerly Department of Natural Sciences, Transylvanian Museum Society, Cluj-Napoca, Romania
| | - Jin Meng
- Division of Paleontology, American Museum of Natural History, New York
| | - Ştefan Vasile
- Laboratory of Paleontology, Faculty of Geology and Geophysics, and Center for Risk Studies, Space Modeling and Dynamics of Terrestrial and Coastal Systems, University of Bucharest
| | | | - Mark A. Norell
- Division of Paleontology, American Museum of Natural History, New York
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Piazza MV, Fernández MS, Leiva PML, Piña CI, Simoncini MS. "Intracascaral space" an eggshell structure of Caiman latirostris eggs. Sci Rep 2021; 11:5579. [PMID: 33692431 PMCID: PMC7970913 DOI: 10.1038/s41598-021-85113-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Accepted: 02/25/2021] [Indexed: 11/09/2022] Open
Abstract
In recent decades, eggshells of eggs from large-bodied reptiles have been studied by many researchers, to describe the eggshell, to compare them to extinct lineages that once inhabited our planet and also to understand how the egg provides the embryo specific conditions during incubation. In previous studies we described and characterized normal and pathologic Caiman latirostris eggshells; we also evaluated how the eggshell changes during incubation. In a study relating temperature variation and eggshell structures of successful eggs, we observed empty structures not previously described that we termed “intracascaral space”. The aim of this study is to describe this structure of C. latirostris eggshells. We hypothesize about the possible functions which it would perform during incubation and for development of the embryos.
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Affiliation(s)
- Mila V Piazza
- Facultad de Ciencias Agrarias, Universidad Nacional de Rosario, Campo Experimental Villarino C.C. 14, Zavalla, Santa Fe, Argentina
| | - Mariela S Fernández
- Instituto de Investigaciones en Biodiversidad y Medioambiente-Consejo Nacional de Investigaciones Científicas y Técnicas, Quintral 1250, 8300, Bariloche, Río Negro, Argentina.
| | - Pamela M L Leiva
- Centro de Investigación Científica y de Transferencia Tecnológica a la Producción-Consejo Nacional de Investigaciones Científicas y Técnicas, España 149, 3105, Diamante, Entre Ríos, Argentina.,Proyecto Yacaré, Laboratorio de Zoología Aplicada: Anexo Vertebrados (Facultad de Humanidades y Ciencias - Universidad de Nacional del Litoral / Ministerio de Aguas, Servicios Públicos y Medio Ambiente), Aristóbulo del Valle 8700, 3000, Santa Fe, Santa Fe, Argentina.,Facultad de Ciencia y Tecnología, Universidad Autónoma de Entre Ríos, Tratado del Pilar 314, 3105, Diamante, Entre Ríos, Argentina
| | - Carlos I Piña
- Centro de Investigación Científica y de Transferencia Tecnológica a la Producción-Consejo Nacional de Investigaciones Científicas y Técnicas, España 149, 3105, Diamante, Entre Ríos, Argentina.,Proyecto Yacaré, Laboratorio de Zoología Aplicada: Anexo Vertebrados (Facultad de Humanidades y Ciencias - Universidad de Nacional del Litoral / Ministerio de Aguas, Servicios Públicos y Medio Ambiente), Aristóbulo del Valle 8700, 3000, Santa Fe, Santa Fe, Argentina.,Facultad de Ciencia y Tecnología, Universidad Autónoma de Entre Ríos, Tratado del Pilar 314, 3105, Diamante, Entre Ríos, Argentina
| | - Melina S Simoncini
- Centro de Investigación Científica y de Transferencia Tecnológica a la Producción-Consejo Nacional de Investigaciones Científicas y Técnicas, España 149, 3105, Diamante, Entre Ríos, Argentina. .,Proyecto Yacaré, Laboratorio de Zoología Aplicada: Anexo Vertebrados (Facultad de Humanidades y Ciencias - Universidad de Nacional del Litoral / Ministerio de Aguas, Servicios Públicos y Medio Ambiente), Aristóbulo del Valle 8700, 3000, Santa Fe, Santa Fe, Argentina. .,Facultad de Ciencia y Tecnología, Universidad Autónoma de Entre Ríos, Tratado del Pilar 314, 3105, Diamante, Entre Ríos, Argentina.
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Elejalde-Cadena N, Cabrera-Hernández JS, Hernández-Rivera R, Moreno A. Searching for a Clue to Characterize a Crystalline Dinosaur's Eggshell of Baja California, Mexico. ACS OMEGA 2020; 5:25936-25946. [PMID: 33073120 PMCID: PMC7557945 DOI: 10.1021/acsomega.0c03334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Accepted: 09/16/2020] [Indexed: 06/11/2023]
Abstract
This work presents a detailed structural and morphological analysis of different dinosaur eggshells such as Spheroolithus (sample 1, 2), lambeosaurinae, Prismatoolithus, and one unidentified ootaxon performed by high-resolution scanning electron microscopy (HRSEM). These ancient eggshells of Late Cretaceous dinosaurs were collected in the coastal area of El Rosario, Baja California in Mexico. Additionally, a thorough study was performed on the elements present in the samples by different techniques such as energy-dispersive spectroscopy (EDS), X-ray fluorescence (XRF), and X-ray photoelectron spectroscopy (XPS). The XPS technique was performed to make an accurate identification of the compounds of two different types of eggshells (Spheroolithus sample 1 and Prismatoolithus). This contribution compares the surface of five different dinosaur eggshells of 74 Ma and their inner section to determine the morphology, distribution of the chemical elements present, as well as their relationship. The observed morphology of the ornithopod eggshells of the herbivorous species shows that the mammillary cones are in the form of columns with microaggregates and irregular pores. In contrast, in the theropod eggshells, the mammillary cones are observed in different forms with wider pores. Finally, the chemical components present in the structures of each of the samples were estimated using the information obtained from SEM-EDS, evidencing the presence of calcite, quartz, and albite in each of the samples. The composition reveals that eggshells contain Si, P, S, K, Ca, Mn, Fe, and Sr and trace elements such as Cr, Cu, and Zn. The presence of heavy metals may be an indication that the eggshells presented diagenetic alterations.
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Affiliation(s)
- Nerith
R. Elejalde-Cadena
- Instituto
de Química, Universidad Nacional
Autónoma de México, Avenue Universidad 3000, Colonia UNAM, Ciudad de México 04510, México
| | | | - René Hernández-Rivera
- Instituto
de Geología, Universidad Nacional
Autónoma de México, Avenue Universidad 3000, Colonia UNAM, Ciudad
de México 04510, México
| | - Abel Moreno
- Instituto
de Química, Universidad Nacional
Autónoma de México, Avenue Universidad 3000, Colonia UNAM, Ciudad de México 04510, México
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