''Coroniceras'' is a genus in the Arietitidae, a family in the ammonitid superfamily Psiloceratoidea, from the lower Sinermurian stage in the

Lower Jurassic The Early Jurassic Epoch (in chronostratigraphy corresponding to the Lower Jurassic Series) is the earliest of three epochs of the Jurassic Period. The Early Jurassic starts immediately after the Triassic-Jurassic extinction event, 201.3 Ma ...

. It is a sub zone ammonite of the '' Arnioceras semicostatum'' Zone. ''Coroniceras'' has a thin discoidal form with a circular whorl section, arched venter, single tall keel, and few but strong ribs. ''Coroniceras'' is included in the subfamily Arietitinae. Fossils of ''Coroniceras bucklandi'' are commonly found at

Lyme Regis Lyme Regis is a town in west Dorset, England, west of Dorchester and east of Exeter. Sometimes dubbed the "Pearl of Dorset", it lies by the English Channel at the Dorset–Devon border. It has noted fossils in cliffs and beaches on the Herita ...

Dorset Dorset ( ; archaically: Dorsetshire , ) is a county in South West England on the English Channel coast. The ceremonial county comprises the unitary authority areas of Bournemouth, Christchurch and Poole and Dorset (unitary authority), Dors ...

Coast, England in the higher limestones of the

Blue Lias The Blue Lias is a geological formation in southern, eastern and western England and parts of South Wales, part of the Lias Group. The Blue Lias consists of a sequence of limestone and shale layers, laid down in latest Triassic and early Jurassi ...

.Davies, G. M. 1964. ''The Dorset Coast'' London: Adam and Charles Black.

References

{{Taxonbar, from=Q5172300 Jurassic ammonites Ammonitida genera Early Jurassic ammonites of Europe Sinemurian life Arietitidae