Marionina grisea Stephenson 1932

• Main Authors: Klinth, Mårten J., Rota, Emilia, Martinsson, Svante, Prantoni, Alessandro L., Erséus, Christer
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2021
• Subjects: Biodiversity; Taxonomy; Animalia; Annelida; Clitellata; Enchytraeida; Enchytraeidae; Marionina; Marionina grisea; Christensen; Stephenson; Lockroy; Port Lockroy; Palmer Archipelago; Wiencke; Wiencke Island
• Online Access: https://doi.org/10.5281/zenodo.6461135; http://treatment.plazi.org/id/039DC377FFA7FFCC4EAFFA64FE485D76

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 . Published as part of Klinth, Mårten J., Rota, Emilia, Martinsson, Svante, Prantoni, Alessandro L. & Erséus, Christer, 2022, New insights into the systematics of Lumbricillus and Marionina (Clitellata: Enchytraeidae) inferred from Southern Hemisphere samples, including three new species, pp. 1103-1133 in Zoological Journal of the Linnean Society 194 (4) on pages 1126-1127, DOI:10.1093/zoolinnean/zlab073, http://zenodo.org/record/6461085