MARIONINA GRISEA STEPHENSON, 1932

(FIG. 12)

Marionina grisea Stephenson, 1932: 243–246, figs 4, 5.

Lumbricillus griseus – Nielsen & Christensen, 1959: 96.

Type material: BMNH 1933.2.23.901–903, three sectioned specimens (studied). Syntypes. Loc. Wiencke Island, Palmer Archipelago. ‘ Discovery’ 1925–1927 (Stephenson, 1932) .

Type locality: Shore of Port Lockroy, Wiencke Island, Palmer Archipelago .

Additions to Stephenson’s original description: Chaetae ~75 µm long. Epidermis covered with rows of pale gland cells and deeply staining granular gland cells. Dorsal vessel with peristomial bifurcation. Nephridia (Fig. 12B) in 7/8–10/11 and postclitellar segments. Ventral nerve cord with small anterior subbuccal bulb; see Marionina discussion above. Sperm funnels ≥ 450 µm long, 160 µm wide. Spermathecae (Fig. 12A) ≥ 300 µm long, 110 µm wide at duct and 70 µm wide at ampulla, with glands ~75 µm wide surrounding pore.

Remarks: This species is discussed together with M. aestuum and M. fusca .