''Chiosella'' is an extinct

conodont Conodonts, are an extinct group of marine jawless vertebrates belonging to the class Conodonta (from Ancient Greek κῶνος (''kōnos''), meaning " cone", and ὀδούς (''odoús''), meaning "tooth"). They are primarily known from their hard ...

genus. The base of the

Anisian In the geologic timescale, the Anisian is the lower stage (stratigraphy), stage or earliest geologic age, age of the Middle Triassic series (stratigraphy), series or geologic epoch, epoch and lasted from million years ago until million years ag ...

stage (also the base of the Middle Triassic series and the top of the

Olenekian In the geologic timescale, the Olenekian is an age (geology), age in the Early Triassic epoch (geology), epoch; in chronostratigraphy, it is a stage (stratigraphy), stage in the Lower Triassic series (stratigraphy), series. It spans the time betw ...

) 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 layers (strata) and layering (stratification). It is primarily used in the study of sedimentary and layered volcanic rocks. Stratigraphy has three related subfields: lithostrati ...

.The elusive origin of Chiosella timorensis (Conodont Triassic). N Goudemand, MJ Orchard, H Bucher and J 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