Middle Ordovician (early Dapingian) conodonts in the Central Andean Basin of NW Argentina

作者：Carlorosi Josefina^*; Heredia Susana; Acenolaza Guillermo

来源：Alcheringa, 2013, 37(3): 299-311.

DOI：10.1080/03115518.2013.744240

• Dapingian
• conodonts
• Central Andean Basin
• NW Argentina

Carlorosi, J., Heredia, S. & Acenolaza, G, 2013. Middle Ordovician (early Dapingian) conodonts in the Central Andean Basin of NW Argentina. Alcheringa 37, 1-13. ISSN 0311-5518. This paper describes and analyzes the significance of a conodont fauna from the Alto del Condor Formation, exposed in the Los Colorados region of the Argentine Eastern Cordillera. Identified taxa are Baltoniodus triangularis, Baltoniodus sp. cf. B. triangularis, Drepanodus sp., Drepanoistodus basiovalis, Drepanoistodus sp. B., Erraticodon patu, Gothodus costulatus, Oistodus sp., Trapezognathus diprion, T. quadrangulum, Triangulodus sp. and Triangulodus? sp. The presence of Baltoniodus triangularis indicates the base of the Dapingian stage (Middle Ordovician). In addition, we report the coexistence of T. diprion and T. quadrangulum. The conodont association suggests a faunal affinity with Baltica and South China, both belonging to the Shallow-Sea Realm of the Temperate-Cold Domain. Josefina Carlorosi [josefinacarlorosi77@gmail]com], INSUGEOUniversidad Nacional de TucumanCONICET, Miguel Lillo 205, (4000) Tucuman, Argentina; Guillermo F. Acenolaza [[e-mail]], Universidad Nacional de TucumanCONICET, Miguel Lillo 205, (4000) Tucuman, Argentina; Susana Heredia [[e-mail]], CONICET-CIGEOBIO and Instituto de Investigaciones Mineras, Facultad de Ingenieria, Universidad Nacional de San Juan, Urquiza y Libertador, (5400) San Juan, Argentina. Received 22.8.2012; revised 18.10.2012; accepted 24.10.12.

• 出版日期2013-9-1