A5011085499- Paleontology and Evolutionary Biology
- Evolution and Paleontology Studies
- Turtle Biology and Conservation
- Ichthyology and Marine Biology
- Fish biology, ecology, and behavior
- Amphibian and Reptile Biology
- Cephalopods and Marine Biology
- Marine Biology and Ecology Research
- Paleontology and Stratigraphy of Fossils
- Physiological and biochemical adaptations
- Geological and Tectonic Studies in Latin America
- Bat Biology and Ecology Studies
- Geology and Paleoclimatology Research
- Coleoptera Taxonomy and Distribution
- Fossil Insects in Amber
- Plant Diversity and Evolution
- Lepidoptera: Biology and Taxonomy
- Calcium Carbonate Crystallization and Inhibition
- Comparative Animal Anatomy Studies
- Planetary Science and Exploration
- Mollusks and Parasites Studies
- Geological and Geochemical Analysis
- Animal Ecology and Behavior Studies
- Species Distribution and Climate Change
- Geochemistry and Geologic Mapping
Universidad del Rosario
2018-2024
Smithsonian Tropical Research Institute
2009-2024
Field Museum of Natural History
2023-2024
Universidad Yachay Tech
2015-2018
Centro de Investigación de la Caña de Azúcar de Colombia
2018
Senckenberg Research Institute and Natural History Museum Frankfurt/M
2014-2016
Alexander von Humboldt Foundation
2015
Smithsonian Institution
2015
North Carolina State University
2011-2014
Florida Museum of Natural History
2009-2012
Abstract Over the last 25 years, researchers, mostly paleontologists, have developed a system of rank-free, phylogenetically defined names for primary clades turtles. As these are not considered established by PhyloCode, newly created nomenclatural that governs naming clades, we take opportunity to convert vast majority previously clade extinct and extant turtles into this new framework. Some converted with minor adjustments. We also define number close apparent gaps. In total, establish 113...
Recent studies suggested that many fossil marine turtles might not be closely related to extant (Chelonioidea). The uncertainty surrounding the origin and phylogenetic position of impacts our understanding turtle evolution complicates attempts develop justify calibrations for molecular divergence dating. Here we present description analysis a new from Lower Cretaceous (upper Barremian-lower Aptian, >120 Ma) Colombia has minimum age is >25 million years older than previously recognized oldest...
ABSTRACT The fossil record of dyrosaurid crocodyliforms spans the Late Cretaceous to Middle Eocene Africa, Asia, Europe, North America, and South America. Prior this study, specimens from America have been limited a few fossils with only two taxa diagnosed. We describe nearly complete skull unassociated mandible new dyrosaurid, Cerrejonisuchus improcerus gen. et sp. nov., Paleocene Cerrejón Formation northeastern Colombia. C. has relatively elongate supratemporal fenestrae well-developed...
The largest extinct turtle from South America had males with horned shells.
Amber is fossilized resin that preserves biological remains in exceptional detail, study of which has revolutionized understanding past terrestrial organisms and habitats from the Early Cretaceous to present day. amber outcrops are more abundant Northern Hemisphere during an interval about 54 million years, Barremian Campanian. The extensive production generated this remarkable record may be attributed biology coniferous producers, growth resiniferous forests proximity transitional...
El bioma mioceno de La Venta (Colombia): un siglo investigación y perspectivas para el futuro. En los depósitos fosilíferos Venta, en Colombia, se registra una las biotas fósiles más ricas la porción tropical Suramérica, lo que representa oportunidad excepcional estudiar efectos cambios climáticos del Mioceno evolución clados existentes extintos ecosistema latitudes bajas. Los vertebrados terrestres acuáticos son mayormente representados; mientras registros plantas e invertebrados menos...
ABSTRACT A new pleurodiran turtle, Cerrejonemys wayuunaiki, from the middle to upper Paleocene, Cerrejón Formation of Colombia, is described on basis a complete skull, lower jaw, partial carapace and plastron, two cervical vertebrae, right coracoid, both pelvic girdles. wayuunaiki shares suite diagnostic characteristics with Podocnemididae, including fully developed, medially extensive cavum pterygoidei that almost completely covered by prolonged posterolateral flanges pterygoid, posterior...
Four distinct fossil turtle assemblages (Chelonia) are recognized from the Panama Canal Basin. The oldest, late Eocene–early Oligocene Gatuncillo Formation, is dominated by podocnemidid pleurodires. early Miocene Culebra Formation includes both podocnemidids and trionychids. to middle Cucaracha taxa classified in Geoemydidae (including Rhinoclemmys panamaensis n. sp.), Kinosternidae (represented Staurotypus moschus large testudinids, trionychids, podocnemidids, finally, Gatun records...
Pelomedusoides comprises five moderate-sized extant genera with an entirely Southern Hemisphere distribution, but the fossil record of these turtles reveals a great diversity extinct taxa, documents several instances gigantism, and indicates complex palaeobiogeographical history for clade. Here, we report new pelomedusoid turtle fossils from late Palaeocene Cerrejón Formation Colombia. The most complete is represented by large skull (condylobasal length = 16 cm) described as Carbonemys...
A new turtle, Puentemys mushaisaensis , from the middle to late Paleocene Cerrejón Formation of Colombia, is described on basis a partial skull and many nearly complete carapaces plastrons representing multiple ontogenetic stages. Whereas P. unique in aspects its shell morphology, it shares diagnostic characteristics bothremydid pleurodirans, including long exoccipital-quadrate contact, very low rounded almost circular carapace, thinner internal bone cortex than that external both carapace...
The Eocene (∾48 Ma) Messel Pit in Germany is a UNESCO World Heritage Site because of its exceptionally preserved fossils, including vertebrates, invertebrates, and plants. fossil vertebrates are typically characterized by their articulated state, some cases the skin, hair, feathers, scales stomach contents also preserved. Despite exceptional macroscopic preservation microstructural aspect these fossils has been poorly explored. In particular, soft tissue structures such as hair or feathers...
The Pliocene-Pleistocene transition in the Neotropics is poorly understood despite major climatic changes that occurred at onset of Quaternary. San Gregorio Formation, younger unit Urumaco Sequence, preserves a fauna documents this critical transition. We report stingrays, freshwater bony fishes, amphibians, crocodiles, lizards, snakes, aquatic and terrestrial turtles, mammals. A total 49 taxa are reported from Vergel Member (late Pliocene) nine Cocuiza (Early Pleistocene), with 28 18 for...
Un depredador dientes de sable del Neotrópico: morfología craneal Anachlysictis gracilis Goin, 1997 (Metatheria, Thylacosmilidae), basada en nuevos especímenes La Venta (Mioceno medio, Colombia). asociación fósil metaterios Medio, Colombia) es una las más diversas América Sur y fundamental para entender la radiación neógena grupo este continente. contiene el registro septentrional Thylacosmilidae Riggs, 1933 Sparassodonta): 1997, primera especie tilacosmílido nombrada Neotrópico. Este taxón...
Overkill of large mammals is recognized as a key driver Pleistocene megafaunal extinctions in the Americas and Australia. While this phenomenon primarily affected mega-mammals, its impact on Quaternary reptiles has been debated. Freshwater turtles, due to scarcity giant forms record, have largely neglected such discussions. Here we present new podocnemidid turtle,
Sandownids are a group of Early Cretaceous-Paleocene turtles that for several decades have been only known by cranial and very fragmentary postcranial elements. Here I report describe the most complete sandownid turtle so far, including articulated skull, lower jaw elements, from Cretaceous (upper Barremian-lower Aptian, >120 Ma), Paja Formation, Villa de Leyva town, Colombia. The new Colombian is defined here as Leyvachelys cipadi genus, species because its almost identical skull...
Background. Neochelys franzeni Schleich, 1993 is the only pleurodire or side-necked turtle from middle Eocene, Messel Pit (the first UNESCO, World Natural Heritage Site in Germany, since 1995). The original description of species based on two specimens SMF ME 1091 (Holotype) and 715 (Paratype) housed at Senckenberg Museum Frankfurt. excellent preservation complete articulated skeletons this makes it a key taxon for understanding evolution phylogeny European genus its relationships with South...
Here we describe the northernmost South American record of fossil turtles from late early Miocene to middle Castilletes Formation, on Alta Guajira Peninsula, Cocinetas basin, Colombia. Turtles in lower segment Formation (c. 16.33 Ma) are pleurodires or side-necked belonging Chelus colombiana Wood, sp., and Podocnemididae incertae sedis, cryptodires hidden-necked attributed Chelonoidis all them characterized by large size their shells, 1 meter more total length. The formation 14 contains...