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Thesoftshellclam,MyaarenuriuLinnt, 1758,isreportedfrom Georgia(USA)estuarine habitats based on studies conducted between 1969 and 1972. Observations on Gcorgiaestuarine habitats whereextantpopulations of softshellclams occurred aredescribed. On severaloccasions, fresh shells withperiostracum and tissueremnants were foundin a brackish drainage system on SapeloIsland. Theseshellsrepresent the fist southemrecordsof extant populationsofsoftshellclams fromsuchaspecializedhabitattype. LivingspecimensofM.arenariafromthebenthos and specimens in the stomach contents of stingrays (Dusyatis sabinu) were collected at four stations during 1969 in the North and South Newport Rivers. mesohaline tidal systems forming part of the southern and northern headwatersof St. Catherines andSapeloSounds.The stomachof astingray collectednear themouth ofLittleOgeeche River during another study also contained specimens of M. arenaria. Ephemeral, intertidal, winter populations of juvenile softshell clams are reported from exposed Pleistocene beach faces along tidal rivers in Chatham, Georgia. The associated fauna collected with softshell clams andoccurrence of other cold temperate and boreal species from Georgiaestuaries arediscussed. ThedistributionofM. arenark appears tobemainlylimitedbyacriticalmaximum temperature of 28T. Therelatively cooler summer temperatures observed at the Sapelo Island tidal ditch site may enable the species to survive in this restricted habitat. Data from the present study indicate that during winter and spring, softshell clams appear to be bionomically important components of the benthos and the diet of stingrays in some Georgia estuarine habitats. Whether or not reproducing populations of M. arenuria occur year-round in Georgia estuaries st i l l remains an open question.

Observations on Extant Populations of the Softshell Clam, Mya arenaria Linné, 1758 (Bivalvia: Myidae), from Georgia (USA) Estuarine Habitats