Synasellus is a genus of isopod crustaceans in the family Asellidae. It contains the following species:
Synasellus albicastrensis Braga, 1960
Synasellus barcelensis Noodt & Galhano, 1969
Synasellus bragai Afonso, 1987
Synasellus bragaianus Henry & Magniez, 1987
Synasellus brigantinus Braga, 1959
Synasellus capitatus (Braga, 1968)
Synasellus dissimilis Afonso, 1987
Synasellus exiguus Braga, 1944
Synasellus favaiensis Eiras, 1974
Synasellus flaviensis Afonso, 1996
Synasellus fragilis Braga, 1946
Synasellus henrii Afonso, 1987
Synasellus hurki Henry & Magniez, 1995
Synasellus insignis Afonso, 1984
Synasellus intermedius Afonso, 1985
Synasellus lafonensis Braga, 1959
Synasellus leysi Henry & Magniez, 1995
Synasellus longicauda Braga, 1959
Synasellus longicornis Afonso, 1978
Synasellus mariae (Braga, 1942)
Synasellus mateusi Braga, 1954
Synasellus meijersae Henry & Magniez, 1987
Synasellus meirelesi Braga, 1959
Synasellus minutus Braga, 1967
Synasellus nobrei Braga, 1967
Synasellus notenboomi Henry & Magniez, 1987
Synasellus pireslimai Braga, 1959
Synasellus pombalensis Afonso, 1987
Synasellus robusticornis Afonso, 1987
Synasellus serranus Braga, 1967
Synasellus tirsensis Afonso, 1987
Synasellus transmontanus Braga, 1959
Synasellus valpacensis Afonso, 1996
Synasellus vidaguensis Afonso, 1996
Synasellus vilacondensis Afonso, 1987
