Artículos
Publicado 2018-02-23
Palabras clave
- Ichthyosauria,
- Ophthalmosauridae,
- Platypterygius,
- aletas anteriores,
- Cretácico Inferior
- Colombia ...Más
Cómo citar
Cortés, D., & Páramo-Fonseca, M. E. (2018). Restos apendiculares de un ictiosaurio oftalmosáurido del Barremiano inferior de Villa de Leiva, Colombia. Boletín De Geología, 40(1), 15–30. https://doi.org/10.18273/revbol.v40n1-2018001
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Resumen
Se describen por primera vez restos apendiculares de ictiosaurio oftalmosáurido procedentes de la Formación Paja de Villa de Leiva, Colombia, cuya edad se establece como Barremiano inferior. Las características morfológicas del espécimen son consistentes con el género Platypterygius. Las aletas presentan un conjunto de caracteres autopomórficos del zeugopodio no presentes en las especies del género de las que se conocen restos apendiculares: (1) faceta para elemento extrazeugodial anterior en el húmero fuertemente cóncava, dirigida anteriormente y con reborde pronunciado; (2) cúbito con hendiduras pronunciadas en sus superficies anterior y posterior; (3) elemento extrazeugopodial anterior en forma de silla de montar con cuatro facetas articulares; (4) pisiforme masivo y en forma distintivamente subtriangular. A pesar de que la procedencia geográfica y estratigráfica del espécimen estudiado es aproximadamente equivalente a la de P. sachicarum, la ausencia de material comparable impide incluir el espécimen en esta especie. Este estudio constituye el primer reporte de restos apendiculares de Platypterygius para el extremo norte de Sudamérica.
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Referencias
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Arkhangelsky, M.S., Averianov, A.O., Pervushov, E.M., Ratnikov, V.Y., and Zozyrev, N.Y. (2008). On ichthyosaur remains from the Cretaceous of the Voronezh Region. Paleontological Journal, 42(3), 287-291.
Bardet, N., and Fernández, M.S. (2000). A new ichthyosaur from the Upper Jurassic lithographic limestones of Bavaria. Journal of Paleontology, 74(3), 503-511.
Baur, G. (1887). On the morphology and origin of the Ichthyopterygia. The American Naturalist, 21, 837-840.
Blainville, H.M.D. (1835). Description de quelques espèces de reptiles de la Californie: précédée de l’analyse d’un systéme général d’erpétologie et d’amphibiologie. Nouvelles Annales du Muséum d’Histoire Naturelle, 4, 233-296.
Broili, F. (1907). Ein neuer Ichthyosaurus aus der norddeutschen Kreide. Palaeontographica, 54, 139-162.
Bürgl, H. (1956). Catálogo de las amonitas de Colombia, parte 1 Pulchelliidae. Boletín Geológico, 4(1), 1-119.
Carter, J. (1846). On the occurrence of a new species of Ichthyosaurus in the Chalk. London Geological Journal, 1, 7-9.
D ́Orbigny, A. (1841). Palé ontologie française, Terrains Crétacés, I. Céphalopodes, 121-456.
Druckenmiller, P.S., and Maxwell, E.E. (2010). A new Lower Cretaceous (lower Albian) ichthyosaur genus from the Clearwater Formation, Alberta, Canada. Canadian Journal of Earth Sciences, 47(8), 1037-1053. doi: 10.1139/E10-028.
Druckenmiller, P.S., Hurum, J., Knutsen, E.M., and Nakrem, H.A. (2012). Two new ophthalmosaurids (Reptilia: Ichthyosauria) from the Agardhfjellet Formation (Upper Jurassic: Volgian/Tithonian), Svalbard, Norway. Norwegian Journal of Geology, 92, 311-339.
Druckenmiller, P.S., and Maxwell, E.E. (2014). A Middle Jurassic (Bajocian) ophthalmosaurid (Reptilia, Ichthyosauria) from the Tuxedni Formation, Alaska and the early diversification of the clade. Geological Magazine, 151(1), 41-48. doi: 10.1017/S0016756813000125.
Efimov, V.M. (1997). A new genus of ichthyosaurs from the Late Cretaceous of the Ulyanovsk Volga region. Paleontological Journal C/C of Paleontologicheskii Zhurnal, 31, 422-426.
Efimov, V.M. (1999). A new family of Ichthyosaurs, the Undorosauridae fam. nov. from the Volgian stage of the European part of Russia. Paleontological Journal, 33(2), 174-181.
Etayo-Serna, F. (1968). El Sistema Cretácico en la región de Villa de Leyva y zonas próximas. Geología Colombiana, 5, 5-74.
Fernández, M.S. (1997). A new ichthyosaur from the Tithonian (Late Jurassic) of the Neuquén Basin, northwestern Patagonia, Argentina. Journal of Paleontology, 71(3), 479-484.
Fernández, M.S. (1999). A new ichthyosaur from the Los Molles Formation (early Bajocian), Neuquen Basin, Argentina. Journal of Paleontology, 73(4), 677-681.
Fernández, M.S. (2001). Dorsal or ventral? Homologies of the forefin of Caypullisaurus (Ichthyosauria: Ophthalmosauria). Journal of Vertebrate Paleontology, 21(3), 515-520. doi: 10.1671/0272-4634(2001)021[0515:DOVHOT]2.0.CO;2.
Fernández, M.S., and Aguirre-Urreta, M.B. (2005). Revision of Platypterygius hauthali von Huene, 1927 (Ichthyosauria: Ophthalmosauridae) from the Early Cretaceous of Patagonia, Argentina. Journal of Vertebrate Paleontology, 25(3), 583-587. doi: 10.1671/0272-4634(2005)025[0583:ROPHVH]2.0.CO;2.
Fernández, M.S., and Maxwell, E.E. (2012). The genus Arthropterygius Maxwell (Ichthyosauria: Ophthalmosauridae) in the Late Jurassic of the Neuqué n Basin, Argentina. Geobios, 45(6), 535-540. doi: 10.1016/j.geobios.2012.02.001.
Fernández, M.S., and Talevi, M. (2014). Ophthalmosaurian (Ichthyosauria) records from the Aalenian–Bajocian of Patagonia (Argentina): an overview. Geological Magazine, 151(1), 49-59. doi: 10.1017/S0016756813000058.
Fernandez, M.S., and Campos, L. (2015). Ophthalmosaurids (Ichthyosauria: Thunnosauria): Alpha taxonomy, clades and names. Publicación Electrónica de la Asociación Paleontológica Argentina, 15(1), 20-30. doi: 10.5710/PEAPA.15.09.2015.96.
Fischer, V. (2012). New data on the ichthyosaur Platypterygius hercynicus and its implications for the validity of the genus. Acta Palaeontologica Polonica, 57(1), 123-134. doi: 10.4202/app.2011.0007.
Fischer, V. (2016). Taxonomy of Platypterygius campylodon and the diversity of the last ichthyosaurs. PeerJ, 4, e2604. doi: 10.7717/peerj.2604.
Fischer, V., Masure, E., Arkhangelsky, M.S., and Godefroit, P. (2011a). A new Barremian (Early Cretaceous) ichthyosaur from western Russia. Journal of Vertebrate Paleontology, 31(5), 1010-1025. doi: 10.1080/02724634.2011.595464.
Fischer, V., Clément, A., Guiomar, M., and Godefroit, P. (2011b). The first definitive record of a Valanginian ichthyosaur and its implications on the evolution of post-Liassic Ichthyosauria. Cretaceous Research, 32(2), 155-163. doi: 10.1016/j.cretres.2010.11.005.
Fischer, V., Maisch, M.W., Naish, D., Kosma, R., Liston, J., Joger, U., Krüger, F.J., Pardo-Pérez, J., Tainsh, J., and Appleby, R.M. (2012). New Ophthalmosaurid Ichthyosaurs from the European Lower Cretaceous Demonstrate Extensive Ichthyosaur Survival across the Jurassic–Cretaceous Boundary. PLoS ONE, 7(1), e29234. doi: 10.1371/journal.pone.0029234.
Fischer, V., Arkhangelsky, M.S., Uspensky, G.N., Stenshin, I.M., and Godefroit, P. (2013a). A new Lower Cretaceous ichthyosaur from Russia reveals skull shape conservatism within Ophthalmosaurinae. Geological Magazine, 151(1), 60-70. doi: 10.1017/S0016756812000994.
Fischer, V., Appleby, R.M., Naish, D., Liston, J., Riding, J.B., Brindley, S., and Godefroit, P. (2013b). A basal thunnosaurian from Iraq reveals disparate phylogenetic origins for Cretaceous ichthyosaurs. Biology Letters, 9(4). doi: 10.1098/rsbl.2013.0021.
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