Arkell.1956.Jurassic..

THE OCEANS 605
Kimeridgian: Aulacostephanus and Rasenia; these like Cardioceras
reached as far south as the Rhone valley as rarities, and may (unlike
Cardioceras) have migrated into Mexico.
Portlandian and Lower Volgian: the Dorsoplanitinae and Virgatitinae.
Upper Volgian (Purbeckian?): the Craspeditidae.
The distribution of these genera and families presupposes free intercommunication
by way of an Arctic Ocean and therefore confirms the
general conclusion that that ocean is primordial.
SUMMARY
The evidence from Jurassic stratigraphy requires the existence in Jurassic
times of the North Pacific, North Atlantic, Scandic and Arctic Oceans;
it requires at least a barrier across the Indian Ocean from Madagascar to
Ceylon and peninsular India; it has nothing to contribute to the problem
of the existence or non-existence of the South Atlantic.
Differences between contemporary faunas on opposite sides of the
Atlantic, in the Gulf of Mexico region and the western Mediterranean
region, are incompatible with the idea that these areas were much closer
together in the Jurassic period.
http://jurassic.ru/