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Variation on cranidial shape of Parabolinella argentinensis Kobayashi (Trilobita, Olenidae) from the Tremadocian of northwestern Argentina: taxonomic implications

Published online by Cambridge University Press:  12 August 2016

Daniela S. Monti ,
María del Huerto Benítez  and
Mariano A. Ramirez
Daniela S. Monti
Affiliation:
Instituto de Ecología, Genética y Evolución de Buenos Aires, Departamento de Ecología Genética y Evolución, Facultad de ciencias Exactas y Naturales, Universidad de Buenos Aires, Intendente Güiraldes 2160, Ciudad Universitaria, Buenos Aires, C1428EGA, Argentina 〈[email protected]〉
María del Huerto Benítez
Affiliation:
Instituto Superior de Correlación Geológica – Facultad de Ciencias Naturales e Instituto Miguel lillio, Universidad Nacional de Tucumán, Miguel Lillo 205, Tucumán CP4000, Argentina 〈[email protected]〉
Mariano A. Ramirez
Affiliation:
Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”, División Mastozoología, Av. Angel Gallardo 470, Buenos Aires, C1405DJR, Argentina 〈[email protected]〉
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Abstract

The late Cambrian-Early Ordovician sequences of the Cordillera Oriental in northwestern Argentina are extensive and highly fossiliferous. The olenid trilobite Parabolinella argentinensis Kobayashi sensu Harrington and Leanza, 1957 was reported from a great number of Tremadocian localities and includes a wide range of morphologies. Based on specimens collected from the type locality (Purmamarca, Jujuy) and the quebrada Moya (Huacalera, Jujuy), as well as on material of the Harrington and Leanza collections in the University of Buenos Aires, classic morphometry and geometric morphometry methods were used to evaluate the variability in the cranidium of P. argentinensis. The results obtained from the two methodologies are similar. Both analyses allowed the review of the diagnosis of P. argentinensis, and the distinction of two new morphologies: Parabolinella clarisae n. sp. and Parabolinella pompadouris n. sp. The results show how morphogeometrics distinguishes more clearly the three morphotypes and provides graphical representations of the differences between those groups and how from the representations plus the correlation between classical variables and principal components, new diagnostic characters that distinguish the three morphospecies, can be identified.

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Journal of Paleontology , Volume 90 , Issue 4 , July 2016 , pp. 672 - 688
Copyright
Copyright © 2016, The Paleontological Society 

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References

Abe, F.R., and Lieberman, B.S., 2012, Quantifying morphological change during an evolutionary radiation of Devonian trilobites: Paleobiology, v. 38, p. 292–307.Google Scholar
Aceñolaza, G.F., 1996, Presencia de Rhabdinopora (Graptolothina) en la Quebrada de Humahuaca, provincial de Jujuy: Ameghiniana, v. 33, p. 95–98.Google Scholar
Aceñolaza, F.G., and Aceñolaza, G.F., 1992, The genus Jujuyaspis as a world reference fossil for the Cambrian–Ordovician boundary, in Webby, B., and Laurie, J.R. eds., Global Perspectives on Ordovician Geology: Rotterdam, Balkema, p. 115–120.Google Scholar
Aceñolaza, G.F., and Albanesi, G.L., 1997, Conodont–trilobite biostratigraphy of the Santa Rosita Formation (Tremadoc) from Chucalezna, Cordillera Oriental, northern Argentina: Ameghiniana, v. 34, p. 113.Google Scholar
Aceñolaza, G.F., Tortello, M.F., and Rábano, I., 2001, The eyes of the early Tremadoc Olenid trilobite Jujuyaspis keideli Kobayashi, 1936: Journal of Paleontology, v. 75, p. 346–350.2.0.CO;2>CrossRefGoogle Scholar
Adrain, J.M., and Westrop, S.R., 2006, New earliest Ordovician trilobite genus Millardicurus: the oldest known hystricurid: Journal of Paleontology, v. 80, p. 650–671.Google Scholar
Aráoz, L., and Vargel, M.M., 2006, Palinología de la transición Cambro–Ordovícica en quebrada de Moya, Cordillera Oriental, Argentina: Revista Brasileira de Paleontología, v. 9, p. 1–8.Google Scholar
Bassler, R.S., 1915, Bibliographic index of American Ordovician and Silurian fossils: Bulletin of the United States National Museum, v. 92, p. 1–152.Google Scholar
Bao, J-S., and Jago, J.B., 2000, Late Cambrian trilobites from near Birch Inlet, South–Western Tasmania: Palaeontology, v. 43, p. 881–917.Google Scholar
Bookstein, F.L., 1991, Morphometric Tools for Landmark Data: Geometry and Biology, Cambridge University Press, 435 p.Google Scholar
Bookstein, F.L., 1996, Applying landmark methods to biological outline data, in Mardia, K.V., Gill, C.A., and Dryden, I.L. eds., Image Fusion and Shape Variability: Leeds, UK, University Press, p. 59–70.Google Scholar
Bookstein, F.L., 1997, Landmark methods for forms without landmarks: morphometrics of group differences in outline shape: Medical Image Analysis, v. 1, p. 97–118.Google Scholar
Bookstein, F.L., Streissguth, A.P., Sampson, P.D., Connor, P.D., and Barr, H.M., 2002, Corpus callosum shape and neuropsychological deficits in adult males with heavy fetal alcohol exposure: Neuroimage, v. 15, p. 233–251.Google Scholar
Brøgger, W.C., 1882, Die Silurischen Etagen 2 und 3 im Kristianiagebiet und auf Eker: Universitats Programm 32, semestre 1882, Kristiania, p. 1–376.Google Scholar
Buatois, L.A., and Mángano, M.G., 2003, Sedimentary facies, depositional evolution of the Upper Cambrian–Lower Ordovician Santa Rosita Formation in Northwest Argentina: Journal of South America Earth Sciences, v. 16, p. 343–363.Google Scholar
Buatois, L.A., Zeballo, F.J., Albanesi, G.L., Ortega, G., Vaccari, N.E., and Mángano, M.G., 2006, Depositional environments and stratigraphy of the Cambrian–Tremadocian Santa Rosita Formation at the Alfarcito area, Cordillera Oriental, Argentina: Integration of biostratigraphic data within a sequence stratigraphic framework: Latin American Journal of Sedimentology and Basin Analysis, v. 13, p. 65–94.Google Scholar
Burmeister, H., 1843, Dier organisation der Trilobiten, aus ihrem lebenden Verwandten entewickelt; nebst einer systematischen übersicht aller zeither beschriebenen Arten: Berlin, 147 p.Google Scholar
Callaway, C., 1877, On a new area of Upper Cambrian rocks in south Shropshire, with a description of a new fauna: Quaternary Journal of the Geological Society of London, v. 33, p. 652–672.Google Scholar
Crônier, C., Auffray, J.-C., and Courville, P., 2005, A quantitative comparison of the ontogeny of two closely–related Upper Devonian phacopid trilobites: Lethaia, v. 38, p. 123–135.Google Scholar
Cock, A.G., 1966, Genetical aspects of metrical growth and form in animals: Quarterly Review of Biology, p. 131–190.Google Scholar
Di Cunzolo, S., Aceñolaza, G.F., and Rodríguez Brizuela, R., 2003, Cruziana–Skolithos ichnoassociation in the Casa Colorada Formation (Upper Cambrian–Tremadocian), Cordillera Oriental of Jujuy province, NW Argentina, in Albanesi, G.L., Beresi, M.S., and Peralta, S.H. eds., Ordovician from the Andes, INSUGEO: Serie Correlación Geológica, v. 17, p. 285–288.Google Scholar
Di Cunzolo, S.C., and Alfaro, M., 2008, Primer registro de Rhabdinopora cf. praeparabola Erdtmann (Graptolithina, Tremadociano inferior) para Sudamérica: 17º Congreso Geológico Argentino, Jujuy, Abstracts, p. 345–346.Google Scholar
Di Rienzo, J.A., Casanoves, F., Balzarini, M.G., Gonzalez, L., Tablada, M., and Robledo, C.W., InfoStat versión 2014: Grupo InfoStat, FCA, Córdoba, Argentina, Universidad Nacional de Córdoba.Google Scholar
Dryden, I.L., and Mardia, K.V., 1998, Statistical Shape Analysis: Chichester, England, John Wiley and Sons, 347 p.Google Scholar
Fortey, R.A., and Hughes, N.C., 1998, Brood pouches in trilobites: Journal of Paleontology, v. 72, p. 638–649.Google Scholar
Fortey, R.A., and Owens, R.M., 1997, Bubble–headed Trilobites, and a new olenid example: Palaeontology, v. 40, p. 451–459.Google Scholar
Green, J., 1832, A monograph of the trilobites of North America: with coloured models of the species: Philadelphia, J. Brano, 93 p.Google Scholar
Green, W.D.K., 1996, The thin-plate spline and images with curving features, in Mardia, K.V., Gill, C.A., and Dryden, I.L. eds., Image Fusion and Shape Variability: Leeds, United Kingdom, University Press, p. 79–87.Google Scholar
Gendry, D., Courville, P., Saucède, T., Laffont, R., and Paris, F., 2013, Contribution of Morphometrics to the Systematics of the Ordovician Genus Neseuretus (Calymenidae, Trilobita) from the Armorican Massif, France: Journal of Paleontology, v. 87, p. 456–471.CrossRefGoogle Scholar
Goodall, C., 1991, Procrustes methods in the statistical analysis of shape: Journal of the Royal Statistical Society, Series B, v. 53, p. 285–339.Google Scholar
Gould, S.J., 1966, Allometry and size in ontogeny and phylogeny: Biological Reviews, v. 41, p. 587–638.Google Scholar
Gunz, P., Mitteroecker, P., and Bookstein, F.L., 2005, Semilandmarks in three dimensions, in Slice, D.E. ed., Modern Morphometrics in Physical Anthropology: New York, Springer, p. 73–98.CrossRefGoogle Scholar
Hammer, Ø., Haper, D.A.T., and Ryan, P.D., 2001, PAST: Paleontological Statistics sofware package for education and data analysis: Paleontología Electrónica, v. 4, no. 1, p. 1–9.Google Scholar
Harrington, H.J., 1937, On some fossils from northern Argentina: Geological Magazine, v. 74, p. 97–124.CrossRefGoogle Scholar
Harrington, H.J., 1938, Sobre las faunas del Ordovícico Inferior del norte argentino: Revista Museo de La Plata (n.s) Sección Paleontología, v. 4, p. 209–289.Google Scholar
Harrington, H.J., and Leanza, A.F., 1943, La fáunula del Tremadociano inferior de Salitre, Bolivia: Revista del Museo de La Plata, nueva serie (sección Paleontología), v. 2, p. 343–356.Google Scholar
Harrington, H.J., and Leanza, A.F., 1952, La clasificación de los “Olenidae” y de los Ceratopygidae” (Trilobita): Revista de la Asociación Geológica Argentina, v. 7, p. 190–205, 1 pl.Google Scholar
Harrington, H.J., and Leanza, A.F., 1957, Ordovician trilobites of Argentina: Lawrence, Kansas, University of Kansas: Special Publication, v. 1, 276 p.Google Scholar
Henningsmoen, G., 1957, The trilobite family Olenidae, with description of Norwegian material and remarks on the Olenid and Tremadocian Series: Skrifter Utgitt av det Norske Videnskaps-Akademi i Oslo I Matematisk-Naturvidenskapelig Klasse 1957, v. 1, 30 p.Google Scholar
Hopkins, M.J., and Webster, M., 2009, Ontogeny and geographic variation of a new species of the corynexochine trilobite Zacanthopsis (Dyeran, Cambrian): Journal of Paleontology, v. 83, p. 524–547.Google Scholar
Hughes, N.C., 1994, Ontogeny, intraspecific variation, and systematics of the Late Cambrian trilobite Dikelocephalus : Smithsonian Contributions to Paleobiology, v. 79, p. 1–89.Google Scholar
Hughes, N.C., and Chapman, R.E, 2001, Morphometry and Phylogeny in the Resolution of Paleobiological Problems — Unlocking the evolutionary significance of an assemblage of Silurian Trilobites, in Adrain, J.M., Edgecombe, G.D., and Lieberman, B.S. eds., Fossils, Phylogeny, and Form, v. 19 of Topics in Geobiology: New York, Kluwer Academic/Plenum Publishers, p. 29–54.Google Scholar
Kayser, E., 1876, Uber primordiale und untersilurische Fossilien aus der Argentinischen Republik. Palaeontographica, Supplementun 3, Lieferung 2, Theil III: Actas de la Academia Nacional de Ciencias, v. 8, p. 297–332.Google Scholar
Kayser, E., 1897, Beitrage zur Kenntniss einiger palazoischer Faunnen Sud-Amerikas: Zeitschr. d. Deutsch: Ceol. Gessels., Bd., v. 49, p. 274–317.Google Scholar
Keidel, J., 1925, Sobre el desarrollo paleogeográfico de las grandes unidades geológicas de la Argentina: Sociedad Argentina de Estudios Geográficos, GAEA, Anales, v. 4, p. 251–312.Google Scholar
Kim, K., Sheets, H.D., Haney, R.A., and Mitchel, C.E., 2002, Morphometric analysis of ontogeny and allometry of the Middle Ordovician trilobite Triarthrus becki : Paleobiology, v. 28, p. 364–377.Google Scholar
Kim, K., Sheets, H.D., and Mitchell, C.E., 2009, Geographic and stratigraphic change in the morphology of Triarthrus beckii (Green) (Trilobita): A test of the Plus ça change model of evolution: Lethaia, v. 42, p. 108–125.Google Scholar
Kobayashi, T., 1936, On the Parabolinella fauna from Jujuy Province, Argentina: Japanese Journal of Geology and Geography, v. 13, p. 85–102.Google Scholar
Kobayashi, T., 1937, The Cambro-Ordovician Shelly Faunas of South America: Journal of the Faculty of Science, Imperial University of Tokio, Section II, v. 4, p. 369–522.Google Scholar
López, C.R., and Nullo, F.E., 1969, Geología de la margen izquierda de la Quebrada de Humahuaca, de Huacalera a Maimará. Departamento Tilcara- Provincia de Jujuy, República Argentina: Revista de la Asociación Geológica Argentina, v. 24, p. 173–182.Google Scholar
Lu, Y-H., and Lin, H-L., 1984, Late late Cambrian and earliest Ordovician trilobites of Jianghan–Changsshan Area, Zhejiang, in Stratigraphy and Palaeontology of systemic boundaries in China, Cambrian-Ordovician boundary: Nanjing, China, Anhui Science and Technology Publishing House, v. 1, p. 45–143.Google Scholar
Ludvigsen, R., 1982, The Cambrian–Ordovician boundary in the western Distric of Mackensie, Canada, in Bassett, M. G., and Dean, W.T. eds., The Cambrian-Ordovician Boundary: Sections, Fossil Distributions, and Correlations, National Museum of Wales, Geological Series Nº3, Cardiff, p. 141–153.Google Scholar
Mángano, M.G., Buatois, L.A., and Aceñolaza, G.F., 1996, Trace fossils and sedimentary facies from an Early Ordovician tide–dominated shelf (Santa Rosita Formation, northwest Argentina): implications for ichnofacies models of shallow marine successions: Ichnos, v. 5, p. 53–88.Google Scholar
Mutanen, M., and Pretorius, E., 2007, Subjective visual evaluation vs. traditional and geometric morphometrics in species delimitation: a comparison of moth genitalia: Systematic Entomology, v. 32, p. 371–386.Google Scholar
Monti, D.S., 2013, Análisis morfogeométrico de Jujuyaspis Keideli Kobayashi (Trilobita, Olenidae) del Ordovícico Temprano del Noroeste Argentino: Ameghiniana, v. 50 (6r): suplemento resúmenes, p. R31.Google Scholar
Monti, D.S., and Confalonieri, V.A., 2013, Phylogenetic analysis of the late Cambrian-early Ordovician genus Parabolinella Brøgger (Trilobita, Olenidae): Geological Journal, v. 48, p. 156–169.Google Scholar
Moya, M.C., 1988, Lower Ordovician in the southern part of the Argentine Eastern Cordillera: Lecture Notes in Earth Sciences, v. 17, p. 55–69.Google Scholar
Otte, D., and Endler, J.A., 1989, Speciation and its consequences: Sunderland, Massachusetts: Sinauer Associates.Google Scholar
Owens, R.M., Fortey, R.A., Cope, J.C.W., Rushton, A.W.A., and Bassett, M.G., 1982, Tremadoc faunas from the Carmarthen district, South Wales: Geological Magazine, v. 119, p. 1–38.Google Scholar
Pandey, S., and Parcha, S.K., 2013, Systematics, Biometry of the species Opsidiscus from the Middle Cambrian succession of the Spiti Basin, India: Journal of the Geological Society of India, v. 82, p. 330–338.Google Scholar
Peng, S., 1991, Tremadocian trilobites from Goutang Formation, Luxi, Western Hunan: Acta Palaeontologica Sínica, v. 30, p. 141–166.Google Scholar
Pérez, S.I., Bernal, V., and González, P., 2006, Differences between sliding semi-landmark methods in geometric morphometrics, with an application to human craniofacial and dental variation: Journal of Anatomy, v. 208, p. 769–784.Google Scholar
Pribyl, A., and Vanek, J., 1980, Ordovician trilobites of Bolivia: Rozpravy Ceskoslovenské Akademie Ved, v. 90, p. 1–90.Google Scholar
Robison, R.A., and Pantoja-Alor, J., 1968, Tremadocian trilobites from the Nochixtlán region, Oaxaca, Mexico: Journal of Paleontology, v. 42, p. 767–800.Google Scholar
Rohlf, F.J., 1999, Shape statistics: procrustes method for the optimal superimposition of landmarks: Systematic Zoology, v. 39, p. 40–59.Google Scholar
Rohlf, F.J., 2010a, Tpsdig version 2.16, Department of Ecology and Evolution, State University of New York. http://life.bio.sunysb.edu.morph/. (accessed 23 June 2016).Google Scholar
Rohlf, F.J., 2010b, Tpsrelw version 1.49, Department of Ecology and Evolution, State University of New York. http://life.bio.sunysb.edu.morph/. (accessed 23 June 2016).Google Scholar
Rohlf, F.J., 2011, TpsRegr, ver. 1.41, Department of Ecology and Evolution, State University of New York. http://life.bio.sunysb.edu.morph/. (accessed 23 June 2016).Google Scholar
Rubinstein, C., Mángano, M.G., and Buatois, L.A., 2003, Late Cambrian acritarchs from the Santa Rosita Formation: implications for the recognition of the Cambrian-Ordovician boundary in the Eastern Cordillera of northwest Argentina: Revista Brasileira de Paleontología, v. 4, p. 43–48.Google Scholar
Shaw, A.B., 1951, The palaeontology of Northwestern Vermont 1: New Later Cambrian trilobites: Journal of Paleontology, v. 25, p. 97–114.Google Scholar
Sheets, H.D., 2014, TwoGroup8, Department of Physics, Canisius College, Buffalo, New York: http://www3.canisius.edu/~sheets/IMP%208.htm. (accessed 23 June 2016).Google Scholar
Swinnerton, H.H., 1915, II. Suggestions for a Revised Classification of Trilobites: Geological Magazine (Decade VI), v. 2, p. 538–545.Google Scholar
Terfelt, F., and Ahlgren, J, 2009, The first remopleuridioidean trilobite and the earliest Parabolinella species recorded in the Furongian of Scandinavia: Journal of Paleontology, v. 83, p. 299–306.Google Scholar
Tortello, M.F., and Aceñolaza, G.F., 1999, Trilobites agnóstidos del Ordovícico basal en la localidad de Purmamarca, Provincia de Jujuy, Argentina: Temas Geológico-Mineros ITGE, v. 26, p. 585–588.Google Scholar
Terfelt, F., and Ahlgren, J., 2009, The first remopleuridioidean trilobite and the earliest Parabolinella species recorded in the Furongian of Scandinavia: Journal of Paleontology, v. 83, p. 299–306.Google Scholar
Tortello, M.F., Zeballo, F.J., and Esteban, S. B., 2013, Trilobites tremadocianos en facies de lutitas oscuras del Miembro Alfacito (Formación Santa Rosita), Quebrada de Moya, Jujuy, Argentina: Ameghiniana, v. 50, p. 137–152.Google Scholar
Turner, J., 1960, Estratigrafía de la Sierra de Santa Victoria y adyacencias: Boletín de la Academia Nacional de Ciencias de Córdoba, v. 41, p. 163–196.Google Scholar
Vergel, M.M., Aceñolaza, G.F., and Aráoz, L., 2007, La Formación Casa Colorada en la quebrada de Moya (Cambro–Ordovícico): aportes a la cronoestratigrafía de una localidad clásica de la Cordillera Oriental de Jujuy (Argentina): Ameghiniana, v. 44, p. 621–630.Google Scholar
Waisfeld, B.G., and Vaccari, N.E., 2003, Trilobites, in Benedetto, J.L. ed., Ordovician Fossils of Argentina: Córdoba, Argentina, Secretaría de Ciencia y Tecnología, Universidad Nacional de Córdoba, p. 295–409.Google Scholar
Walch, J.E.I., 1771, Die Naturgeschichte der Versteinerungen, Dritter Theil: Paul Jonathan Felstecker, p. 1–235.Google Scholar
Webster, M., 2007, Ontogeny and evolution of the Early Cambrian trilobite genus Nephrolenellus (Olenelloidea): Journal of Paleontology, v. 81, p. 1168–1193.Google Scholar
Webster, M., 2009, Systematic revision of the Cambrian trilobite Bathynotus Hall, 1860, with documentation of new occurrences in western Laurentia and implications for intercontinental biostratigraphic correlation: Memoirs of the Association of Australasian Palaeontologists, v. 37, p. 369–406.Google Scholar
Webster, M., 2011, The structure of cranidial shape variation in three early ptychoparioid trilobite species from the Dyeran-Delamaran (traditional “lower-middle” Cambrian) boundary interval of Nevada, U.S.A.: Journal of Paleontology, v. 85, p. 179–225.Google Scholar
Webster, M., and Sheets, H.D., 2010, A practical introduction to landmark-based geometric morphometrics, in Alroy, J. and Hunt, G. eds., Quantitative Methods in Paleobiology: The Paleontological Society Papers, v. 16, p. 163–188.Google Scholar
Westergård, H.A., 1922, Sveriges Olenidskiffer. Sveriges geologiska undersokning: Serie Ca., v. 18, p. 1–205.Google Scholar
Zeballo, F.J., and Albanesi, G.L., 2013, New conodont species and biostratigraphy of the Santa Rosita Formation (upper Furongian-Tremadocian) in the Tilcara Range, Cordillera Oriental of Jujuy, Argentina: Geological Journal, v. 48, p. 170–193.Google Scholar
Zeballo, F.J., and Albanesi, G.L., 2009, Conodontes cámbricos y Jujuyaspis keideli Kobayashi (Trilobita) en el Miembro Alfarcito de la Formación Santa Rosita, quebrada de Humahuaca, Cordillera Oriental de Jujuy: Ameghiniana, v. 46, p. 537–556.Google Scholar
Zeballo, F.J., and Tortello, M.F., 2005, Trilobites del Cámbrico Tardío-Ordovícico Temprano del área de Alfarcito, Tilcara, Cordillera Oriental de Jujuy, Argentina: Ameghiniana, v. 42, p. 127–142.Google Scholar
Zeballo, F.J., Albanesi, G.L., Ortega, G., and Tortello, M.F., 2003, Biostratigraphy of Ordovician sequences from Alfarcito area, Tilcara, Eastern Cordillera of Jujuy, Argentina, in Albanesi, G.L., Beresi, M.S., and Peralta, S.H. eds., Ordovician from the Andes: INSUGEO, Serie de Correlación Geológica, v. 17, p. 161–166.Google Scholar
Zeballo, F.J., Albanesi, G.L., and Ortega, G., 2005, Conodontes y graptolitos de las formaciones Alfarcito y Rupasca (Tremadociano) en el área de Alfarcito, Tilcara, Cordillera Oriental de Jujuy, Argentina. Parte 2: Paleontología sistemática: Ameghiniana, v. 42, p. 47–66.Google Scholar
Zeballo, F.J., Albanesi, G.L, and Ortega, G., 2008, New late Tremadocian (Early Ordovician) conodont and graptolite records from the southern South American Gondwana margin (Eastern Cordillera, Argentina): Geologica Acta, v. 6, p. 127–141.Google Scholar
Zeballo, F.J., Albanesi, G.L., and Ortega, G., 2011, Biostratigraphy and paleoenvironments of the Santa Rosita Formation (Late Furongian-Tremadocian), Cordillera Oriental of Jujuy, Argentina, in Gutiérrez-Marco, J.C., Rábano, I. and García-Bellido, D. eds., Ordovician of the World: Madrid, Instituto Geológico y Minero de España, Cuadernos del Museo Geominero, v. 14, p. 625–632.Google Scholar