''Chiosella'' is an extinct

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 ...

genus. The base of the

Anisian In the geologic timescale, the Anisian is the lower stage or earliest age of the Middle Triassic series or epoch and lasted from million years ago until million years ago. The Anisian Age succeeds the Olenekian Age (part of the Lower Triassic Ep ...

stage (also the base of the Middle Triassic series and the top of the Olenekian) is sometimes laid at the first appearance of ''Chiosella timorensis'' in the

stratigraphic record Stratigraphy is a branch of geology concerned with the study of rock (geology), rock layers (Stratum, strata) and layering (stratification). It is primarily used in the study of sedimentary rock, sedimentary and layered volcanic rocks. Stratigrap ...

.The elusive origin of Chiosella timorensis (Conodont Triassic). N Goudemand, MJ Orchard, H Bucher andJ Jenks, Geobios, Volume 45, Issue 2, March–April 2012, Pages 199–207,

References

External links

* * Conodont genera Middle Triassic fish Triassic conodonts Anisian life {{conodont-stub