24
2
May
391
416
EDWARDS, P. G. 1981. The foraminiferid genus Gavelinella in the Senonian of north-west Europe. Palaeontology, 24, 2, 391–416.
P. G. Edwards The morphology and stratigraphic importance of species, subspecies and varieties of the genus Gavelinella from the Senonian (Upper Cretaceous) chalk of north-west Europe are discussed. It is suggested that several stratigraphically significant lineages arose from a Gavelinella schloenbachi (Reuss) ancestor during the Senonian. Within the Gavelinella clementiana (d'Orbigny) plexus of evolving forms, one subspecies G. dementiana convexa is described as new. The Gavelinella lorneiana (d'Orbigny)-G. pertusa (Marsson) lineage is regarded separately, and it is suggested to have arisen from a Gavelinella ammonoides (Reuss) ancestor during the Turonian. The Palaeontological Association (Free Access)