Prosphaerosyllis tetralix (Eliason, 1920)
Sphaerosyllis tetralix Eliason, 1920: 13, fig. 4 a–b; Campoy 1982: 277.
Sphaerosyllis (Prosphaerosyllis) tetralix . Hartmann-Schröder 1996: 177, fig. 77.
Prosphaerosyllis tetralix . San Martín 2003: 217, fig. 114.
Material examined. INFUECO stations: BC2 0710, 1 specimen, 129 m depth; BC8 0710, 1 specimen, 87 m depth; BC7 0611, 1 specimen, 122 m depth.
Habitat. In sandy sediments of marine caves of 8 to 15 m depth, located on the southwest coast of Tenerife, being cited as P. aff tetralix (Riera et al. 2016); in circalittoral sediments between 80 to 90 m.
Distribution. Atlantic-Mediterranean, from Scandinavia to the Canary Islands.