Hystrichosphaeridium westii Deflandre in West, 1961, p.452.

Name not validly published: no description or illustration.
Taxonomic senior synonym: Hystrichosphaeridium (now Operculodinium) israelianum, according to Wall and Dale (1968a, p.315, as hystrichosphere type "x" of West). Head (1998a, p.216) considered this to be equivalent to the "Operculodinium centrocarpum/israelianum complex".

Age: Early Pleistocene.