The first galeommatoidean from inland waters: a new species ofArthritica(Bivalvia, Lasaeidae) from artesian springs in South Australia, with comments on other Australian members of the genus

Arthritica korniushini n. sp. is described from three groups of artesian mound springs in the southwestern part of the Lake Eyre Spring Supergroup. All other described species of Arthritica are oceanic or estuarine. The four previously described Australian species referrable to Arthritica are reviewed.