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The Ordovician genus Pygodus (conodont) in the Cuyania Terrane, Argentina

Published online by Cambridge University Press:  22 August 2016

SUSANA HEREDIA*
Affiliation:
CONICET-IIM, Facultad de Ingeniería, Universidad Nacional de San Juan, Libertador San Martín 1109, 5500, San Juan, Argentina
ANA MESTRE
Affiliation:
CONICET-IIM, Facultad de Ingeniería, Universidad Nacional de San Juan, Libertador San Martín 1109, 5500, San Juan, Argentina
TATIANA SORIA
Affiliation:
CONICET-IIM, Facultad de Ingeniería, Universidad Nacional de San Juan, Libertador San Martín 1109, 5500, San Juan, Argentina
CINTIA KAUFMANN
Affiliation:
CONICET-IIM, Facultad de Ingeniería, Universidad Nacional de San Juan, Libertador San Martín 1109, 5500, San Juan, Argentina
*
*Author for correspondence: [email protected]

Abstract

This contribution deals with the record of the Ordovician genus Pygodus in Cuyania, Argentina. Several classical sections have been sampled for conodonts in the Precordillera and the San Rafael Block, involving diverse sedimentary deposits: coarse clastic rocks with carbonate cement, carbonate beds intercalated in fine clastic deposits, green shale, and black carbonate deposits. The recovered species of this genus are Pygodus lunnensis Zhang, P. anitae Bergström, P. serra (Hadding), P. protoanserinus Zhang and P. anserinus Lamont & Lindström. These key conodonts indicate middle to upper Darriwilian – lower Sandbian age for the bearing strata. The species P. protoanserinus is recorded for the first time from the Precordillera. Detailed observations were made on specimens of P. anitae, P. lunnensis and P. protoanserinus; the two last species are described for the first time from Cuyania.

Type
Original Articles
Copyright
Copyright © Cambridge University Press 2016 

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References

Albanesi, G. 1998. Taxonomía de conodontes de las secuencias ordovícicas del Cerro Potrerillo, Precordillera Central de San Juan, República Argentina. Actas. Academia Nacional de Ciencias de Córdoba 12, 99253.Google Scholar
An, T. X. & Zheng, S. C. 1990. The Conodonts of the Marginal Areas around the Ordos Basin. North China. Beijing: SciencePress, 201 pp.Google Scholar
Armstrong, H. A. 1997. Conodonts from the Ordovician Shinnel Formation, southern Uplands, Scotland. Palaeontology 40, 763–97.Google Scholar
Astini, R. 2002. Los conglomerados basales del Ordovícico de Ponón Trehué (Mendoza) y su significado en la historia sedimentaria del terreno exótico de Precordillera. Revista de la Asociación Geológica Argentina 57 (1), 1934.Google Scholar
Beresi, M. & Heredia, S. 2000. Sponge spicule assemblages from the Middle Ordovician of Ponón Trehué, Southern Mendoza, Argentina. Revista Española de Paleontología 15 (1), 3748.Google Scholar
Bergström, S. M. 1971. Conodont biostratigraphy of the Middle and Upper Ordovician of Europe and eastern North America. In Symposium on Conodont Biostratigraphy (eds Sweet, W. C. & Bergström, S. M.), pp. 83157. Geological Society of America Memoir 127.Google Scholar
Bergström, S. M. 1983. Biogeography, evolutionary relationships, and biostratigraphic significance of Ordovician platform conodonts. Fossils and Strata 15, 3558.Google Scholar
Bergström, S. M. 1990. Biostratigraphic and biogeographic significance of Middle and Upper Ordovician conodonts in the Girvan Succession, south-west Scotland. Courier Forschungs Institut Senckenberg 118, 143.Google Scholar
Bergström, S. M. 2007. Middle and Upper Ordovician conodonts from the Fågelsång GSSP, Scania, Southern Sweden. GFF 129, 7782.Google Scholar
Bergström, S. M. & Orchard, M. J. 1985. Conodonts of the Cambrian and Ordovician Systems from the British Isles. In A Stratigraphical lndex of Conodonts (eds Higgins, A. C. & Austin, R. L.), pp. 3267. Chichester: Ellis Horwood.Google Scholar
Bergström, S. M., Rhodes, F. H. T. & Lindström, M. 1987. Conodont biostratigraphy of the Llanvirn–Llandeilo and Llandeilo–Caradoc Series boundaries in the Ordovician System of Wales and the Welsh Borderland. In Conodonts: Investigative Techniques and Applications (ed. Austin, R. L.), pp. 294315. Chichester: Ellis Horwood.Google Scholar
Bordonaro, O., Keller, M. & Lehnert, O. 1996. El Ordovícico de Ponón Trehué en la Provincia de Mendoza (Argentina): redefiniciones estratigráficas. Actas XIII Congreso Geológico Argentino y III Congreso de Exploración de Hidrocarburos 1, 541–50.Google Scholar
Brussa, E. D., Mitchell, C. E., Ortega, G., Maletz, J. & Astini, R. A. 2003. Middle Ordovician graptolite biostratigraphy from the Los Azules Formation at Los Gatos creek, Central Precordillera, Argentina. Proceedings of the 7th International Graptolite Conference, San Juan, Argentina. Serie de Correlación Geológica 18, 21–5.Google Scholar
Cañas, F. L. & Aguirre, H. 2005. Estratigrafía de alta resolución de la Formación San Juan (Ordovícico inferior de la Precordillera de Cuyo, San Juan, Argentina): resultados preliminares. Actas XVI Congreso Geológico Argentino 3, 365–70.Google Scholar
Cingolani, C. & Varela, R. 1999. The San Rafael Block, Mendoza (Argentina): Rb–Sr isotopic age of basement rocks. Actas II South American Symposium on Isotope Geology, 23–6.Google Scholar
Criado Roqué, P. & Ibáñez, G. 1979. Provincia geológica Sanrafaelino-pampeana. II Simposio de Geología Regional Argentina. Córdoba: Academia Nacional de Ciencias, pp. 837–69.Google Scholar
Dubinina, S. V. & Ryazantsev, A. V. 2008. Conodont stratigraphy and correlation of the Ordovician volcanogenic and volcanogenic sedimentary sequences in the South Urals. Russian Journal of Earth Sciences 10 (5), 18.Google Scholar
Dzik, J. 1976. Remarks on the evolution of Ordovician conodonts. Acta Palaeontologica Polonica 21, 395455.Google Scholar
Dzik, J. 1994. Conodonts of the Mójcza Limestone. In Ordovician Carbonate Platform Ecosystem of the Holy Cross Mountains (eds Dzik, J., Olempska, E. & Pisera, A.), pp. 43128. Palaeontologica Polonica 53.Google Scholar
Fåhræus, L. E. 1982. Allopatric speciation and lineage zonation exemplified by the Pygodus serrusP. anserinus transition (Conodontophorida, Ordovician). Newsletters on Stratigraphy 11 (1), 17.CrossRefGoogle Scholar
Fåhræus, L. E. & Hunter, D. R. 1981. Paleoecology of selected conodontophorid species from the Cobbs Arm Formation (middle Ordovician), New World Island, north-central Newfoundland. Canadian Journal of Earth Sciences 18, 1653–65.Google Scholar
Feltes, N. A., Albanesi, G. L. & Bergström, S. M. 2016. Conodont biostratigraphy and global correlation of the middle Darriwilian – lower Sandbian (Ordovician) Las Aguaditas Formation, Precordillera of San Juan, Argentina. Andean Geology 43 (1), 6085.Google Scholar
González Díaz, E. F. 1981. Nuevos argumentos a favor del desdoblamiento de la denominada ‘Serie de la Horqueta'del Bloque de San Rafael, provincia de Mendoza. Actas VIII Congreso Geológico Argentino 3, 241–56.Google Scholar
Heredia, S. 1982. Pygodus anserinus Lamont et Lindström (Conodonto) en el Llandeillano de la Formación Ponón Trehué. Ameghiniana 19 (3–4), 101–4.Google Scholar
Heredia, S. 1998. Eoplacognathus robustus (Conodonta) en la Formación Ponón Trehué (Ordovícico Inferior), Sierra Pintada, provincia de Mendoza, Argentina. Ameghiniana 35 (3), 337–44.Google Scholar
Heredia, S. 2001. Late Llanvirn conodonts from Ponón Treuhué Formation, Mendoza, Argentina. Gaia Revista de Geociencias 16, 101–17.Google Scholar
Heredia, S. 2002. Upper Llanvirn – Lower Caradoc Conodont Biostratigraphy, Southern Mendoza, Argentina. In Aspects of the Ordovician System in Argentina (ed. Aceñolaza, F. G.), pp. 167–76. Serie Correlación Geológica 16.Google Scholar
Heredia, S. 2006. Revisión estratigráfica de la Formación Ponón Trehué (Ordovícico), Bloque de San Rafael, Mendoza. Serie Correlación Geológica 21, 5974.Google Scholar
Heredia, S. 2012. Bioestratigrafía de conodontes del Darriwiliano medio (Ordovícico) de Argentina: la Formación Las Aguaditas, Precordillera Central. Revista Mexicana de Ciencias Geológicas 29, 7686.Google Scholar
Heredia, S., Kaufmann, C., Mestre, A., Soria, T. & Ortega, G. 2014. La edad de la base de la Formación La Cantera (Ordovícico) en la Precordillera Oriental, Sierra de Villicum, San Juan. XIX Congreso Geológico Argentino, S2–13.Google Scholar
Heredia, S. & Mestre, A. 2013. El conodonte darriwiliano Lenodus variabilis (Sergeeva) en la Precordillera Central de San Juan, Argentina. Serie Correlación Geológica 29 (1), 8192.Google Scholar
Heredia, S. & Mestre, A. In press. Remnant of the Ordovician carbonate platform (Ponón Trehué Formation), Mendoza, Argentina. In The Pre-Carboniferous Geological Evolution of the San Rafael Block, Western Argentina: Paleogeographic Implications in the Proto-Andean Gondwana Margin (ed. Cingolani, C.). Springer Briefs in Earth System Sciences. Berlin: Springer.Google Scholar
Heredia, S., Mestre, A., Soria, T. & Kaufmann, C. 2015. The Pygodus Serra Zone in Cuyania, Argentina. Stratigraphy 12 (2), 37–9.Google Scholar
Hünicken, M. & Ortega, G. 1987. Lower Llanvirn – Lower Caradoc (Ordovician) conodonts and graptolites from the Argentine Central Precordillera. In Conodonts: Investigative Techniques and Applications (ed. Austin, R. L.), pp. 136–45. Chichester: Ellis Horwood Limited.Google Scholar
Keller, M. 1999. Argentine Precordillera: Sedimentary and Plate Tectonic History of a Laurentian Crustal Fragment in South America. Geological Society of America Special Paper 341, 1131.Google Scholar
Keller, M., Lehnert, O. & Bordonaro, O. 1996. The Ordovician of San Rafael: its significance for the history of the Precordillera. The Geological Society of America South–Central Section, Abstract with Programs 28 (1), 38748.Google Scholar
Lamont, A. & Lindström, M. 1957. Arenigian and Llandeilian Cherts identified in the Southern Uplands of Scotland by means of conodonts, etc. Transactions of the Edinburgh Geological Society 17, 6070.Google Scholar
Lehnert, O. 1995. Ordovizische Conodonten aus der Präkordillere Westargentiniens: Ihre Bedeutung für Stratigraphie und Paläogeographie. Erlanger Geologische Abhandlungen 125, 1193.Google Scholar
Löfgren, A. 1978. Arenigian and Llanvirnian conodonts from Jämtland, northern Sweden. Fossils and Strata 13, 1129.Google Scholar
Mestre, A., Beresi, M. & Heredia, S. 2013. Nautiloid cephalopod concentration beds in the San Juan Formation (middle Darriwilian) of the Argentine Precordillera. Publicación Especial – Asociación Paleontológica Argentina 13, 73–8.Google Scholar
Núñez, E. 1979. Descripción geológica de la Hoja 28d, estación Soitué. Provincia de Mendoza. Servicio Geológico Nacional Boletín 166, 167.Google Scholar
Ortega, G. & Albanesi, G. L. 2002. Los Azules Formation, Cerro Viejo, Huaco, Precordillera of San Juan Province. In Ordovician and Silurian of the Precordillera, San Juan, Argentina. Field Trip Guide (ed. Aceñolaza, G.). Miscelánea 10, 6579.Google Scholar
Ortega, G., Albanesi, G. L., Banchig, A. L. & Peralta, G. L. 2008. High resolution conodont–graptolite biostratigraphy in the Middle–Upper Ordovician of the Sierra de La Invernada Formation (Central Precordillera, Argentina). Geológica Acta 6, 161–80.Google Scholar
Ortega, G., Albanesi, G. & Frigerio, S. 2007. Graptolite conodont biostratigraphy and biofacies of the Middle Ordovician Cerro Viejo succession, San Juan, Precordillera, Argentina. Palaeogeography, Palaeoclimatology, Palaeoecology 245, 245–64.Google Scholar
Ortega, G., Albanesi, G. L. & Hünicken, M. A. 1995. Bioestratigrafía en base a conodontes y graptolitos de las formaciones San Juan (techo) y Gualcamayo (Arenigiano–Llanvirniano) en el cerro Potrerillo, Precordillera de San Juan, Argentina. Boletín de la Academia Nacional de Ciencias 60, 317–64.Google Scholar
Ortega, G. & Rickards, R. B. 2003. A Darriwilian (Middle Ordovician) graptolite fauna of the lower member of the Los Azules Formation, Cerro Viejo, San Juan Precordillera, Argentina. Proceedings of the 7th International Graptolite Conference, San Juan, Argentina, Serie de Correlación Geológica 18, 8792.Google Scholar
Ottone, E. G., Albanesi, G., Ortega, G. & Holfeltz, G. D. 1999. Palynomorphs, conodonts and associated graptolites from the Ordovician Los Azules Formation, Central Precordillera, Argentina. Micropaleontology 45, 225–50.Google Scholar
Peralta, S. 1993. Estratigrafía y consideraciones paleoambientales de los depósitos marino clásticos eopaleozoicos de la Precordillera Oriental de San Juan. Actas XII Congreso Geológico Argentino y II Congreso de Exploración de Hidrocarburos 1, 128–37.Google Scholar
Purnell, M. A., Donoghue, P. C. J. & Aldridge, R. J. 2000. Orientation and anatomical notation in conodonts. Journal of Paleontology 74, 113–22.Google Scholar
Ramos, V. A. 1995. Sudamérica: un mosaico de continentes y océanos. Ciencia Hoy 6, 24–9.Google Scholar
Serra, F., Albanesi, G., Ortega, G. & Bergström, S. 2015. Biostratigraphy and palaeoecology of Middle–Late Ordovician conodont and graptolite faunas of the Las Chacritas River section, Precordillera of San Juan, Argentina. Geological Magazine 152 (5), 813–29.Google Scholar
Stone, J. 1987. Review of investigative techniques used in the study of conodonts. In Conodonts: Investigative Techniques and Applications (ed. Austin, R.), pp.1734. Chichester: Ellis Horwood Limited.Google Scholar
Stouge, S. & Bagnoli, G. 1999. The suprageneric classification of some Ordovician prioniodontid conodonts. In Studies on Conodonts: Proceedings of the Seventh European Conodont Symposium, Bologna–Modena, 1998 (ed. Serpagli, E.), pp. 145–58. Bollettinodella Società Paleontologica Italiana 37.Google Scholar
Sweet, W. C. 1988. The Conodonta: Morphology, Taxonomy, Paleoecology, and Evolutionary History of a Long-Extinct Animal Phylum. Oxford Monographs on Geology and Geophysics, No. 10. New York & Oxford: Clarendon Press, 212 pp.Google Scholar
Zhang, J. H. 1998. The Ordovician conodontgenus Pygodus . In Proceedings of the Sixth European Conodont Symposium (ECOSVI) (ed. H. Szaniawski). Palaeontologia Polonica 58, 87105.Google Scholar
Zhen, Y. Y., Percival, I. G. & Webby, B. D. 2004. Early Ordovician (Bendigonian) conodonts from central New South Wales, Australia. Courier Forschungsinstitut Senckenberg 245, 3973.Google Scholar