''Variabiloconus'' is an extinct genus of

conodont Conodonts (Greek ''kōnos'', "cone", + ''odont'', "tooth") are an extinct group of agnathan (jawless) vertebrates resembling eels, classified in the class Conodonta. For many years, they were known only from their tooth-like oral elements, which ...

s. ''Variabiloconus bassleri'' (Furnish) is from the upper part of middle Gasconade Dolomites at Phillips Quarry, United States. ''Variabiloconus crassus'' Zeballo and Albanesi,

2013 File:2013 Events Collage V2.png, From left, clockwise: Edward Snowden becomes internationally famous for leaking classified NSA wiretapping information; Typhoon Haiyan kills over 6,000 in the Philippines and Southeast Asia; The Dhaka garment fact ...

is from the Late Cambrian (late

Furongian The Furongian is the fourth and final epoch and series of the Cambrian. It lasted from to million years ago. It succeeds the Miaolingian series of the Cambrian and precedes the Lower Ordovician Tremadocian Stage. It is subdivided into three sta ...

) or early Ordovician (

Tremadocian The Tremadocian is the lowest stage of Ordovician. Together with the later Floian Stage it forms the Lower Ordovician Epoch. The Tremadocian lasted from to million years ago. The base of the Tremadocian is defined as the first appearance of the ...

) of the Santa Rosita Formation in the Tilcara Range, Cordillera Oriental of Jujuy in Argentina.New conodont species and biostratigraphy of the Santa Rosita Formation (upper Furongian–Tremadocian) in the Tilcara Range, Cordillera Oriental of Jujuy, Argentina. Fernando J. Zeballo; Guillermo L. Albanesi, Geological Journal, 2013, volume 48, issues 2–3, pages 170–193,

References

External links

* * Conodont genera Cambrian conodonts Ordovician conodonts Furongian first appearances Early Ordovician extinctions Tremadocian Ordovician Argentina Fossils of Argentina Fossil taxa described in 1986 {{conodont-stub