Microstomum papillosum, v.Graff, 1882

Faubel, A. & Warwick, R. M., 2005, The marine flora and fauna of the Isles of Scilly: Free-living Plathelminthes (‘ Turbellaria’), Journal of Natural History 39 (1), pp. 1-45 : 13

Microstomum papillosum v. Graff, 1882

Material examined

Sites 1, 11, 15: several specimens, in squash preparation.

Geographical distribution. NE Atlantic: Iceland (Isafjördur); Norwegian Sea: Norway (TromsØ); North Sea: Norway (Herdla off Bergen, Sartor Oe), North Frisian Islands (Sylt); Skagerrak: Gullmarfjord; Baltic Sea: Kieler Bucht; Mediterranean Sea: Gulf of Lion, Tyrrhenian Sea, Adriatic Sea (Trieste), Sea of Marmara, Black Sea ( Claparede 1861; Böhmig 1889; v. Graff 1913; Meixner 1938; Steinböck 1938; Riedl 1956, 1959a; Ax 1959; Faubel 1974b, 1976 a, 1977).

Remarks

The determination of Microstomum papillosum could be very erroneous if the specimens had not reached full male maturity. In pre-mature specimens the stylet lacks the distal hook-like bend and, therefore, the species could be mistaken for Microstomum septentrionale Sabussow, 1899 (cf. Faubel 1974b).