INVESTIGADORES
MESTRE GARCIA Ana Isabel
artículos
Título:
Stratigraphical distribution of the Ordovician conodont Erraticodon Dzik in Argentina
Autor/es:
HEREDIA, S.; CARLOROSI, J.; MESTRE, A.; SORIA,. T.
Revista:
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Lugar: Amsterdam; Año: 2013 vol. 45 p. 224 - 234
ISSN:
0895-9811
Resumen:
Three different species of the Ordovician genus Erraticodon Dzik are described and illustrated. Erraticodon
patu Cooper is reported from the LowereMidde 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.