Abstract

Three new species of dinoflagellate cysts are described from the Late Bathonian and Early Callovian of England. Jansonia scarffei and Mancodinium morgensternii are described from the Late Bathonian sediments exposed at the Cement Works Quarry at Shipton-on-Cherwell in Oxfordshire. Orobodinium changii is described from Early Callovian sediments exposed on the Yorkshire coast. The genus Mancodinium has previously only been recorded from Early Bajocian or older assemblages, therefore the consistent presence of M. morgensternii in the Late Bathonian and Early Callovian is considered to be of stratigraphic/evolutionary significance.

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