Stratigraphical distribution of the Ordovician conodont Erraticodon Dzik in Argentina |
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| Affiliation: | 1. Department of Earth and Environmental Sciences, Korea University, Seoul 136-713, Republic of Korea;2. School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, People''s Republic of China;3. Department of Earth Environmental Sciences, Andong National University, Andong 760-749, Republic of Korea;4. College of Earth Sciences, Jilin University, Changchun 130061, People''s Republic of China;1. Nanjing Institute of Geology and Palaeontology, Key Laboratory of Economic Stratigraphy and Palaeogeography, Nanjing, China;2. GeoZentrum Nordbayern, Universität Erlangen-Nürnberg, Fachgruppe Paläoumwelt, Loewenichstr. 28, D-91054 Erlangen, Germany;1. CICTERRA (CONICET-UNC) – Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, Av. Vélez Sarsfield 1611, Córdoba X5016GCA, Argentina;2. School of Earth and Ocean Sciences, University of Victoria, P.O. Box 1700, Victoria, V8W 2Y2, B.C., Canada;3. School of Earth and Environment and UWA Oceans Institute, The University of Western Australia, Perth, WA 6009, Australia;4. Research School of Earth Sciences, The Australian National University, Canberra, ACT 2601, Australia;5. School of Earth Sciences, Division of Earth History, The Ohio State University, 125 S. Oval Mall, Columbus, OH 43210, USA |
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| Abstract: | Three different species of the Ordovician genus Erraticodon Dzik are described and illustrated. Erraticodon patu Cooper is reported from the Lower–Midde Ordovician strata of the Acoite and Alto del Cóndor formations. E. cf. Erraticodon balticus and Erraticodon hexianensis from Middle Ordovician carbonate deposits of the San Juan Formation are analyzed and compared to specimens of these species from Australia, China, Newfoundland, and Baltica. E. patu and E. hexianensis are recorded for first time in the San Juan Formation of Precordillera. The elements of E. cf. E. balticus resemble closely E. balticus Dzik but lack the important denticle on the posterior process of the S elements. An evaluation of the stratigraphic occurrences of these species relative to those of key Lower and Middle Ordovician conodont species such as Trapezognathus diprion Lindström, Oepikodus intermedius Serpagli, Baltoniodus triangularis (Lindström), Baltoniodus navis Lindström, Yangtzeplacognathus crassus (Chen and Zhang) and Eoplacognathus pseudoplanus (Viira) indicates they value for biostratigraphic correlation. |
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| Keywords: | Ordovician Conodonts Argentina |
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