J. Mees et N. Fockedey, 1ST RECORD OF SYNIDOTEA-LAEVIDORSALIS (MIERS, 1881) (CRUSTACEA, ISOPODA) IN EUROPE (GIRONDE ESTUARY, FRANCE), Hydrobiologia, 264(1), 1993, pp. 61-63
This note reports on the presence of a well established population of
the isopod Synidotea laevidorsalis (Miers) in the Gironde estuary (sou
thwestern France). This species is new for the European fauna. S. laev
idorsalis is a nonendemic cool-temperate to subtropical, shallow-water
species which was probably introduced into the study area from Asia.
In the salinity range of 1 to 10 g l-1 of the Gironde the species cons
titutes an important component of the brackish-water hyperbenthic comm
unity. The population was already present in 1975 when it was misident
ified as the native species Idotea emarginata (Fabricius).