Fossils of the Purbeck Limestone Group

The gastropod and bivalve data below are based on Radley 2002. For ostracods see Clements 1992; see also Horne 2002. (B) (G) below mean respectively bivalve, gastropod.

Viviparus Clays Member
Upper Cypris Clays and Shales Member
Unio Member
Broken Shell Limestone Member
Chief Beef Member
Corbula Member
Scallop Member
Intermarine Member
Cinder Member
Cherty Freshwater Member
Marly Freshwater Member
Soft Cockle Member
Hard Cockle Member
Cypris Freestones Member
Broken Beds Member
Cap and Dirt Beds Member
Viviparus sp. (G)	+				+	+	+		+	+	+	+	+	+	+	+
Unionoids (B)							?					+	+	+	+
Neomiodontids (B)				+			+		+			+	+	+	?
Gyraulus loryi (G)	+				+	+	+					+		+
Theodoxus fisheri Arkell (G)					?	+	+		+	+	+		+
Margaritifera menkei (B)														+
Procerithium sp. (G)	+				+					+	+
Peverilia perisphincta Arkell (G)										+
Paraglauconia tricarinata (J deC Sowerby) (G)											+
Hydrobiids (G)	+	?	+	+	+	+	+		+	+	+	+
Promathilda microbinaria Arkell (G)											+
Juramarinula cf. durlstonense (G)											+
Ptychostylus harpaeformis (G)							+		+	+	+
Isognomon sp. (B)									+		+
Thracia sp. (B)											+
Pectinids (B)									+	+	+
Oysters (B)											+
Modiolus sp. (B)								+		+
Nanogyra bulla (J deC Sowerby) (B)								+
Praeexogyra cf. distorta (B)								+	+	+
Gervillia obtusa Roemer (B)										+
Protocardia sp. (B)		?	+	+	?			+		+	+
Mytilids (B)									+	+	+
Corbula sp. (B)		?	+	+					+	+	+
Arcoideans (B)										+
Pinnids (B)										+
Lucinids (B)										+
Provalvata helicoides (de Loriol) (G)	+	?	+	+	+	+	+		+
Prophysa bristovii (G)	+					+	+		+
Proauricula jaccardi (B)	+						+
Ellobium sp. (B)							+
Coelodiscus swindonensis Arkell	+
Delphinula sp.	+

Notes

Hydrobia jenkinsi Smith has established itself in fresh water [from brackish] in England in historic times. Theodoxus is a freshwater genus tolerant of brackish. See Cox LR, `General characteristics of Gastropoda' in Treatise on Invertebrate Paleontology, I: Mollusca 1, p.187