Malacostracan Crustacea from the Dinantian of Foulden, Berwickshire, Scotland

TheTealliocarisandCrangopsispreviously recorded from Foulden are shown to beBairdops elegansandBelotelson traquairi, respectively. This locality thus yields the oldest KnownBairdops. The two species are confined to the lower Carboniferous sedimentary basin S of the Southern Uplands massif. Elsewhere, these genera are thought to characterise the nearshore marine fauna. The reciprocal relationship noted between malacostracans and actinopterygians may therefore be a function of fluctuating salinity.