Devonian Vertebrates From Colombia

Abstract

ABSTRACT. Vertebrate remains are reported from the Emsian±Eifelian Floresta Formation and the Late Devonian (?Frasnian) Cuche Formation of north-eastern Colombia. The material from the Floresta Formation is associated with a marine invertebrate fauna and includes an arthrodire and probably a rhenanid. Several vertebrate-bearing localities are recorded from the Cuche Formation; vertebrates occur with plant remains and lingulid fragments. They include an acanthodian (Cheiracanthoides? sp.), a chondrichthyan (Antarctilamna? sp.), placoderms (Bothriolepis sp., Asterolepis? sp. and an undetermined groenlandaspidid or primitive brachythoracid 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 assemblage suggests a Late Frasnian age and is surprisingly similar to Late Devonian vertebrate assemblages found in similar facies of Europe and North America, notwithstanding the presence of the Gondwanan chondrichthyan Antarctilamna?.

Trilobites and inarticulate brachiopods from the Devonian Floresta Formation of Colombia: a review

“…1), is a key area for the study of the Colombian Devonian fauna and flora of Colombia. Abundant and diverse plants, invertebrates and vertebrates have been described (e.g., Caster 1939, Berry et al 2000, Janvier & Villarroel 2000. However, although fossils are abundant and widely distributed in the succession, their preservation is often poor, except in some localities.…”

The late Middle Devonian fauna of Red Hill I, Nevada, and its paleobiogeographic implications

“…1) as can be expected from marine fishes. Asterolepis has its widest distribution around the Middle/Late Devonian boundary, as shown by Young (1981Young ( , 1993 and Janvier & Villarroel (2000). The distribution of Asterolepis coincides with the occurrences of the widely distributed antiarch Bothriolepis, for which Young (2003) suggested a dispersal through the sea.…”

Early Devonian (Late Emsian) shark fin remains (Chondrichthyes) from the Paraná Basin, southern Brazil

“…Janvier and Suárez-Riglos 1986, Z. falciformis Janvier and Suárez-Riglos 1986 and Z. spirifera Janvier and Suárez-Riglos 1986. According to Janvier and Villarroel (2000), the chondrichthyan Antarctilamna occurs the Givetian of Australia, but is also found in rocks as old as Late Emsian in Iran and Saudi Arabia. The Bolivian records (Gagnier et al 1988(Gagnier et al , 1989 possibly range from the Emsian up to the Frasnian.…”

“…Disarticulated chondrichthyan, acanthodians, osteichthyans and placoderm fossils have for decades been reported from Devonian rocks in Bolivia, Colombia, venezuela and the Falkland Islands (Blieck et al 1996, Gagnier et al 1988, Janvier and Suárez-Riglos 1986, Janvier and Villarroel 2000, Santos 1961, young et al 2000, Maisey et al 2002. older fish faunas have been recorded in Argentina (Albanesi et al 1995).…”