WoRMS source details
All the species have been obtained in sand from stations located at depths of more than 10 meters. In addition, Sphaerosyllis tetralix has been taken between tide-marks on different substrata. There follows a list of other syllids from a locality with Amphioxus-sand.
Dioplosyllis Gidholm, 1962 (original description)
Dioplosyllis cirrosa Gidholm, 1962 (original description)
Eurysyllis brevipes (Hartmann-Schröder, 1956) accepted as Plakosyllis brevipes Hartmann-Schröder, 1956 (redescription)
Plakosyllis brevipes Hartmann-Schröder, 1956 (new combination reference)
Sphaerosyllis tetralix Eliason, 1920 accepted as Prosphaerosyllis tetralix (Eliason, 1920) (additional source)
Holotype MNHN POLY TYPE 721, geounit Roscoff, identified as Brania swedmarki Gidholm, 1962