Articles
Apendicular remains of an ophthalmosaurid ichthyosaur from the lower Barremian of Villa de Leiva, Colombia
Dirley Cortés- María Eurídice Páramo-Fonseca
Published 2018-02-23
Keywords
- Ichthyosauria,
- Ophtalmosauridae,
- Platypterygius,
- forefins,
- Lower Cretaceous
- Colombia ...More
How to Cite
Cortés, D., & Páramo-Fonseca, M. E. (2018). Apendicular remains of an ophthalmosaurid ichthyosaur from the lower Barremian of Villa de Leiva, Colombia. Boletín De Geología, 40(1), 15–30. https://doi.org/10.18273/revbol.v40n1-2018001
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Abstract
The appendicular remains of an ophthalmosaurid Ichthyosaur from the Paja Formation in Villa de Leiva, Colombia (Lower Barremian) are here described. The morphological characteristics of the specimen are consistent with the genus Platypterygius. Nonetheless, the forefins of this specimen have a set of autapomorphic zeugopodium characters that differentiate this from other species of the genus whose appendicular remains are known. These include (1) a strongly concave facet for the anterior extrazeugopodial element on the humerus, directed anteriorly with a pronounced flange; (2) ulnar slits in the anterior and posterior surfaces; (3) a saddle-shaped anterior extrazeugopodial element with four facets joints; and (4) a distinctly massive and subtriangular pisiform. While the stratigraphic and geographic origin of the studied specimen is approximately equivalent to P. sachicarum, the absence of comparable material prevents including specimen in this species. This study is the first report of appendicular remains of Platypterygius in northern South America.
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References
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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.
Fischer, V., Bardet, N., Guiomar, M., and Godefroit, P. (2014a). High diversity in Cretaceous ichthyosaurs from Europe prior to their extinction. PLoS One, 9(1), e84709. doi: 10.1371/journal.pone.0084709.
Fischer, V., Arkhangelsky, M.S., Naish, D., Stenshin, I.M., Uspensky, G.N., and Godefroit, P. (2014b). Simbirskiasaurus and Pervushovisaurus reassessed: implications for the taxonomy and cranial osteology of Cretaceous platypterygiine ichthyosaurs. Zoological Journal of the Linnean Society, 171(4), 822-841. doi: 10.1111/zoj.12158.
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