Article
Geology
Ashley L. Ferguson, Leif Tapanila
Summary: This study describes a well-preserved clutch of turtle eggs in southern Utah. The characteristics of the eggshell and porosity suggest that these turtles nested in a humid environment. By extrapolating from the egg size, the researchers estimated the size of the adult turtle and the number of eggs in the clutch. A new species of turtle egg was named based on the unique attributes of the eggshell.
CRETACEOUS RESEARCH
(2022)
Article
Paleontology
Stephanie K. Drumheller, Hannah Maddox, Michelle R. Stocker, Christopher R. Noto
Summary: Patterns of bone damage can provide insights into the paleobiology and paleoecology of extinct groups. Shell disease and vertebrate feeding traces among turtles have been difficult to accurately identify due to convergent morphologies. This study uses microcomputed tomographic scanning to visualize internal bone damage in modern and fossil examples and demonstrates that internal damage patterns can differentiate between different bone modifying processes. This suggests that internal visualization techniques have been underutilized in untangling surficial modifications.
PALAEONTOLOGIA ELECTRONICA
(2023)
Article
Biodiversity Conservation
Malcolm L. McCallum
Summary: Biodiversity losses due to climate change are a critical issue facing humanity, with turtles as a unique vertebrate group facing significant extinction. Recent studies show that the extinction rate of modern turtles far exceeds that of geological eras, raising concerns about the rapid loss of these charismatic animals in our lifetime. The findings highlight the urgent need for conservation efforts to prevent further biodiversity loss.
BIODIVERSITY AND CONSERVATION
(2021)
Article
Geology
Li Xu, Junfang Xie, Shukang Zhang, Seung Choi, Noe-Heon Kim, Diansong Gao, Xingsheng Jin, Songhai Jia, Yongli Gao
Summary: A detailed study of a batch of eggs found in Neixiang County, Henan Province, China revealed that they are turtle eggs with unique eggshell structures and formation mechanisms. Furthermore, the discovery of aragonite may extend the temporal record of confirmed aragonite in turtle eggs.
CRETACEOUS RESEARCH
(2022)
Article
Multidisciplinary Sciences
Amy P. Bogolin, Drew R. Davis, Richard J. Kline, Abdullah F. Rahman
Summary: The study investigated the use of drones and high-resolution cameras to survey large freshwater turtle populations in arid riverine landscapes, demonstrating the great potential of drone-based surveys.
Article
Zoology
Scott A. Thomson, Natalia R. Friol, Arthur White, Dion Wedd, Arthur Georges
Summary: Disagreement exists regarding the taxonomic identity of the Australian Elseya populations. Recent research suggests that the extant species is conspecific with the late Pleistocene fossil Elseya lavarackorum, rather than being a new species.
VERTEBRATE ZOOLOGY
(2023)
Article
Ecology
Thomas W. Dudgeon, Marissa C. H. Livius, Noel Alfonso, Stephanie Tessier, Jordan C. Mallon
Summary: A new model using intramanual measurements has been introduced to estimate habitat likelihood more accurately. This model supports the hypothesis that stem-turtles were primarily terrestrial in nature.
ECOLOGY AND EVOLUTION
(2021)
Article
Biodiversity Conservation
Joshua R. Ennen, Mickey Agha, Sarah C. Sweat, Wilfredo A. Matamoros, Jeffrey E. Lovich, John B. Iverson, Anders G. J. Rhodin, Robert C. Thomson, H. Bradley Shaffer, Christopher W. Hoagstrom
Summary: The study conducted the first global evaluation of turtle biodiversity and imperilment at a sub-basin level, identifying smaller areas of high conservation value. High-priority sub-basin clusters were mostly located along tropical and subtropical coastlines. The findings emphasize the global significance of Asia as a key area for turtle conservation, while identifying focal areas across the globe where targeted turtle conservation is especially needed.
BIOLOGICAL CONSERVATION
(2021)
Article
Materials Science, Multidisciplinary
Radan Elvis Matias de Oliveira, Fernanda Loffler Niemeyer Attademo, Ana Caroline Freitas Caetano de Sousa, Joao Vitor de Oliveira Gurgel, Marcela dos Santos Magalhaes, Carlos Eduardo Bezerra de Moura, Ana Bernadete Lima Fragoso, Flavio Jose de Lima Silva, Moacir Franco de Oliveira
Summary: The morphological studies on the digestive system of hawksbill turtle hatchlings revealed strong indications of adaptations to a carnivorous diet, shedding light on their feeding behavior in the wild.
MICROSCOPY AND MICROANALYSIS
(2022)
Article
Paleontology
Randolph Glenn de la Garza, Henrik Madsen, Mats E. Eriksson, Johan Lindgren
Summary: This study describes a new hard-shelled sea turtle fossil from the lower Eocene of Denmark, with vestigial soft tissues preserved. The fossil shows primitive characters and possible affinity with the extinct pan-cheloniid Eochelone. The presence of bite marks on the carapace suggests attacks by crocodylians or other large-sized seagoing tetrapods.
JOURNAL OF VERTEBRATE PALEONTOLOGY
(2021)
Article
Geology
A. Guerrero, F. Ortega, A. Perez-Garcia
Summary: Shell pitting is a relatively common phenomenon in extinct turtles, but its characteristics and causes are still unclear. Previous interpretations of shell pitting in turtle fossils were often speculative or lacked sufficient justification. In this study, a mark found on the carapace of a bothremydid turtle from a fossil site in Spain was analyzed using physical examination and computerized axial tomography scan. The possible etiology, pathogenesis, and healing stages of the mark were discussed, and an ectoparasitic origin was suggested as the most likely explanation. This study provides the first report of a pathology of ectoparasitic origin in the shell of a bothremydid turtle.
CRETACEOUS RESEARCH
(2022)
Article
Marine & Freshwater Biology
Zaira M. Perazo, Cibele C. Monteiro, Karoline Fernanda Ferreira Agostinho, Vitor L. Carvalho, Leticia G. Pereira, Cinthya L. de Oliveira, Vicente Vieira Faria
Summary: The northeast coast of Brazil has been a known feeding area for sea turtles, with little information on stranding patterns. A decade-long monitoring program from 2010-2019 revealed 905 stranded sea turtles along a 130km stretch, with green turtles being the most common. Strandings show seasonal and geographic patterns, emphasizing the need for conservation measures to consider these factors.
JOURNAL OF THE MARINE BIOLOGICAL ASSOCIATION OF THE UNITED KINGDOM
(2021)
Article
Biodiversity Conservation
Andrea Guerrero, Adan Perez-Garcia
Summary: The study focused on several shell anomalies in P. bullockii, identifying and examining 14 specimens with anomalies to determine the frequency and distribution of these anatomical deviations. All anomalies were described, figured, and discussed for their morphogenetic causes, and it was concluded that these anomalies did not present negative consequences for the vital activities of the specimens.
Article
Biology
Leah M. Costello, Daniel Garcia-Parraga, Jose Luis Crespo-Picazo, Jonathan R. Codd, Holly A. Shiels, William Joyce
Summary: Smooth muscle in the atria of semi-aquatic emydid turtles does not play a significant role in regulating cardiac filling, while the sinus venosus may contribute in this aspect.
JOURNAL OF EXPERIMENTAL BIOLOGY
(2022)
Article
Ecology
Chun Xue Chai, Abdullah Samat, Farah Shafawati Mohd-Taib, Izwan Bharudin, Johari Tim
Summary: Fungal infection is a potential threat to sea turtle embryos in nests. The presence of fungi in hatchery nest sand and failed eggs of green turtles and hawksbills collected from hatcheries in Malaysia was investigated. The three most common fungi were identified as Pseudallescheria ellipsoidea (35.4%), Scedosporium aurantiacum (27.2%), and Fusarium solani (22.0%) based on DNA sequencing. Although total fungi abundance had no significant effect on hatching success, the abundance of P. ellipsoidea significantly increased mortality in the nests. Future research should focus on understanding the biology of these fungi to develop better techniques to prevent fungal infection in sea turtle eggs and hatchery employees.
Article
Multidisciplinary Sciences
Edwin Cadena
Article
Multidisciplinary Sciences
Edwin Cadena
Article
Multidisciplinary Sciences
Edwin A. Cadena, Juan Abella, Maria D. Gregori
Review
Paleontology
Edwin Alberto Cadena, Jose Luis Roman-Carrion
Article
Geosciences, Multidisciplinary
Edwin A. Cadena, Alejandra Mejia-Molina, Carla M. Brito, Sofia Penafiel, Kleber J. Sanmartin, Luis B. Sarmiento
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2018)
Article
Multidisciplinary Sciences
Edwin Cadena, Juan Abella, Maria Gregori
Article
Geosciences, Multidisciplinary
Edwin-Alberto Cadena, Ismael Casado-Ferrer
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2019)
Article
Paleontology
Edwin-Alberto Cadena, Andres Vanegas, Carlos Jaramillo, John M. Cottle, Thomas A. Johnson
JOURNAL OF VERTEBRATE PALEONTOLOGY
(2019)
Article
Multidisciplinary Sciences
E-A Cadena, T. M. Scheyer, J. D. Carrillo-Briceno, R. Sanchez, O. A. Aguilera-Socorro, A. Vanegas, M. Pardo, D. M. Hansen, M. R. Sanchez-Villagra
Article
Geosciences, Multidisciplinary
Edwin-Alberto Cadena
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2020)
Article
Geography, Physical
Andres Alfonso-Rojas, Laura M. Herrera-Gutierrez, Catalina Suarez, MartiN R. Ciancio, Jonathan S. Pelegrin, Edwin-Alberto Cadena
Summary: Pubenza in Colombia is a significant palaeontological site with findings of small animals including birds, turtles, and vipers, indicating a rich Late Pleistocene ecosystem. The discovery of well-preserved wasp nests and new material of various animals makes it a region of great interest for future research in palaeontology and archaeology.
JOURNAL OF QUATERNARY SCIENCE
(2021)
Article
Multidisciplinary Sciences
Edwin-Alberto Cadena, Andres Link, Siobhan B. Cooke, Laura K. Stroik, Andres F. Vanegas, Melissa Tallman
Summary: This article reports fossils of Stupendemys geographica and Caninemys tridentata found in the Tatacoa Desert in Colombia, indicating that more than two large freshwater turtle species coexisted in a single ecosystem during the middle Miocene in northern South America. Additionally, the article shows changes in the morphology of S. geographica during its ontogeny, with comparisons made to extant representatives of Podocnemididae.
Article
Paleontology
Edwin-Alberto Cadena, Carlos De Gracia, Diego A. Combita-Romero
Summary: The oldest fossil record of Lepidochelys, a genus of marine turtles, has been discovered in the Upper Miocene Chagres Formation of Panama. The preserved carapace exhibits unique features and exceptional preservation, providing insights into the evolutionary history of Lepidochelys. Additionally, the discovery challenges traditional paradigms of biomolecular preservation by demonstrating potential DNA persistence in fossils from lower latitudes.
JOURNAL OF VERTEBRATE PALEONTOLOGY
(2023)
Article
Zoology
Edwin-Alberto Cadena, Diego A. Combita-Romero
Summary: This study describes limb bones and fossil shell remains from the upper Valanginian, Rosa Blanca Formation of Colombia, which shed light on the conditions and characteristics of large-size evolution in protostegid turtles.
ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY
(2023)