Eight fossil associations of larger foraminiferids have been recognised in Western Australia. Each represents a certain environment. Three of these associations were typical of seagrass communities at depths of less than 12 metres: theLepidocyclina (Eulepidina) ephippioides-Heterostegina borneensisassociation in oceanic salinities but in sheltered situations, theLepidocyclina (Nephrolepidina) howchini-Cycloclypeus eidae/carpenteriassociation in the same salinities but in open situations, and theLepidocyclina (Nephrolepidina) howchini-Marginopora vertebralisassociation in metahaline salinities. Two associations were typical of high energy sandy substrates in depths of less than 30 metres: theOperculina complanata-Gypsina howchiniassociation in oceanic salinities and theAustrotrillina howchini-Flosculinella bontangensisassociation in metahaline salinities. Three associations were typical of open situations with oceanic salinities. TheLepidocyclina (Eulepidina) badjirraensis-Cycloclypeus eidaeassociation lived in waters deeper than 12 metres; its lower boundary overlapped theCycloclypeus eidae-Operculina complanataassociation, which ranged to near the base of the euphotic zone at depths near 120 metres. TheOperculina complanata-smaller benthonic foraminiferal association was typical of depths near 120 metres or greater.