Los Peces Devónicos del Macizo de Floresta (Boyacá, Colombia). Consideraciones taxonómicas, bioestratigráficas, biogeográficas y ambientales

Fish remains are recorded from the Emsian-Eifelian Floresta Formation and the Late Devonian (? Frasnian) Cuche Formation of Boyacá, Colombia. The material from the Floresta Formation is associated to marine invertebrates and is referred to an indetermined arthrodire and probably a rhenanid. Several...

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Bibliographic Details
Main Authors: Janvier, Philippe, Villarroel A., Carlos
Format: Article in Journal/Newspaper
Language:Spanish
Published: Universidad Nacional de Colombia - Sede Bogotá - Facultad de Ciencias - Departamento de Geociencias 1998
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Online Access:https://revistas.unal.edu.co/index.php/geocol/article/view/31461
Description
Summary:Fish remains are recorded from the Emsian-Eifelian Floresta Formation and the Late Devonian (? Frasnian) Cuche Formation of Boyacá, Colombia. The material from the Floresta Formation is associated to marine invertebrates and is referred to an indetermined arthrodire and probably a rhenanid. Several fish localities occur in the Late Devonian Cuche Formation. They have yielded an acanthodian, a chondrichthyan (Antarctilamna? sp.), placoderms (Bothriolepissp., Asterolepis? sp. and an indetermined arthrodire), a stegotrachelid actinopterygian, and three sarcopterygians (a cosmine-covered form tentatively referred to an osteolepidid, the porolepiform Holoptychius sp., and the rhizodontid Strepsodus? sp.). This fish fauna of the Cuche Formation suggests a Late Frasnian age. By the presence of Asterolepis and Holoptychius, it is surprisingly similar to the Late Devonian vertebrate faunas found in the Old Red Sandstone of Europe and North America, although the presence of the chondrichthyan Antarctilamna can be regarded as a Gondwanan 'signature'. Such a mixture of Euramerican and Gondwana taxa suggests close geographical links between Euramerica and northern South America in Late Devonian times. Se reporta la presencia de restos de peces devónicos en las Formaciones Floresta (Emsiano-Eifeliano) y Cuche (Frasniano ?) del Macizo de Floresta (Bovacá). EI material de la primera unidad esta asociado a invertebrados marinos y es referido a un Artrodiro indeterminado, probablemente un renánido. En la Formación Cuche, del Devónico Superior, ocurren varias localidades con peces, las que han proporcionado un Acantodio, un Condrictio (Antarctilamna ? sp.), Placodermos (Bothriolepis sp., Asterolepis sp. y un Artrodiro indeterminado), un Actinopterigio "Stegotraquélido", y tres Sarcopterigios (una forma cubierta de cosmina que tentativamente se refiere a un Osteolepídido, el Porolepiforme Holoptychius sp., y el Rizodóntido Strepsodus ? sp.). La fauna de la Formación Cuche sugiere una edad Frasniana Tardía. Por la presencia de ...