''Tokurites'' is a monospecific genus of

ammonite Ammonoids are a group of extinct marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs, commonly referred to as ammonites, are more closely related to living coleoids (i.e., octopuses, squid and cuttlefish) ...

that lived during the

Toarcian The Toarcian is, in the ICS' geologic timescale, an age and stage in the Early or Lower Jurassic. It spans the time between 182.7 Ma (million years ago) and 174.1 Ma. It follows the Pliensbachian and is followed by the Aalenian. The Toarcian ...

stage of

early Jurassic The Early Jurassic Epoch (geology), Epoch (in chronostratigraphy corresponding to the Lower Jurassic series (stratigraphy), Series) is the earliest of three epochs of the Jurassic Period. The Early Jurassic starts immediately after the Triassic-J ...

, ammonite zone of Zugodactylites braunianus. Its shell has ribs, which cross the ventral part of the shell creating pricky tubercules there. By these tubercules, it differs from any other member of

Dactylioceratidae The family Dactylioceratidae comprises Early Jurassic ammonite genera with ribbed and commonly tuberculate shells that resembled later Middle Jurassic stephanoceratids and Upper Jurassic perisphinctids. Shells may be either evolute or involu ...

. This genus is closely related to genus ''

Reynesoceras ''Reynesoceras'' is genus of ammonites that lived during the upper Pliensbachian stage of early Jurassic. It has evolved from ''Prodactylioceras'', or '' Cetonoceras''. '' Dactylioceras (Eodactylites)'' has probably evolved from this genus. ''Av ...

''. The genus is based on the single specimen with diameter of 15 mm and thus consist from only one species ''Tokurites inopinatus''. This is the only specimen that has been found in the Asian part of Russia.

References

Dactylioceratidae Toarcian life Ammonites of Asia Fossils of Russia Ammonitida genera {{Ammonitina-stub