It is native to the northeastern Atlantic Ocean and the Mediterranean Sea where it occurs in the intertidal and shallow sub-tidal zones on soft sediment.

[3] The proximal part of the proboscis bears about 25 longitudinal rows of tiny papillae, and the distal part bears 6 longitudinal rows of larger, knob-like protuberances, and a ring of papillae at the tip.

[2] Phyllodoce lineata occurs in the northeastern Atlantic Ocean, its range including the North Sea, the west coast of Scotland and Ireland, the Bay of Biscay, the Iberian peninsula and the Mediterranean Sea.

[1] It is found in the intertidal and shallow sub-tidal zones on sandy and muddy substrates.

[4] Eggs typically hatch into trochophore larvae, which are planktonic, and when sufficiently developed, undergo metamorphosis into segmented juveniles.