''Prodactylioceras'' is genus of ammonite that lived during the

Pliensbachian The Pliensbachian is an age (geology), age of the geologic timescale and stage (stratigraphy), stage in the stratigraphic column. It is part of the Early Jurassic, Early or Lower Jurassic epoch (geology), Epoch or series (stratigraphy), Series an ...

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 ...

. It has evolved from '' Reynesocoeloceras'', but maybe not directly, but through '' Bettoniceras''. Its fossils were found in Europe, Asia and North America. While sometimes, genus ''Bettoniceras'', which differs from ''Prodactylioceras'' only by lacking tubercules is considered valid, in other cases it is considered to be a synonym of this genus.Meister, C., Dommergues, J. L., Dommergues, C., Lachkar, N., & El Hariri, K. (2011). Les ammonites du Pliensbachien du jebel Bou Rharraf (Haut Atlas oriental, Maroc). Geobios, 44(1), 117-e1. Species as ''P. italicum'', or ''P. colubriforme'' would not be in that case belonging to this genus, as they are members of genus ''Bettoniceras''.Wiedenmayer, F. (1980). Die Ammoniten Der Mediterranen Provinz Im Pliensbachian Und Unteren Toarcian Aufgrund Neuer Untersuchungen Im Generoso-Becken: Lombardische Alpen (Vol. 93). Birkhauser.

Description

Ammonites of this genus had evolute shells, with circular to slightly depressed whorl section. In compressed species, ribs were fine and often prorsiradiate and they were wearing ventrolateral tubercules. In depressed species, ribs are coarser and swollen, while ventrolateral tubercules are larger.

References

Dactylioceratidae Pliensbachian life Early Jurassic ammonites of Europe Early Jurassic ammonites of Asia Early Jurassic ammonites of North America Ammonitida genera {{Ammonitina-stub