(Fig. 5)
Lysianella petalocera G.O. Sars, 1883: 78, pl. 3 fig. 3.—G.O. Sars, 1890: 51, pl. 18 fig. 2.— Della Valle, 1893: 797, pl. 61 fig. 9.— Stebbing, 1906: 31.— Stephensen, 1923: 11.— Schneider, 1926: 7.— Stephensen, 1929: 54.— Stephensen, 1935: 43.— Stephensen, 1942: 470 (table).— Enequist, 1949: 387 (table), 399.— Gurjanova, 1951: 183, fig. 54.—J.L. Barnard, 1958: 94 (list).— Oldevig, 1959: 10.— Vader, 1984: 18.— Barnard & Karaman, 1991: 499.— Palerud & Vader, 1991: 37.— Tzvetkova & Golikov, 2001: 89.
Types. Probably lost, see remarks below.
Material examined. 1 specimen, TM 8732, Hjeltefjord, Bergen, Norway [approx. 60º24’N 05º05’E], 260 m, Rothlisberg-Pearcy epibenthic sled, 4 August 1978, W. Vader.
Type locality. Lyngdalsfjorden, southern Norway, 60–100 fathoms [~ 110–180 m], and Bekkervig [Bekkjarvik], western Norway.
Habitat. Living in ascidians (Stephensen 1935).
Depth range. 35–260 m (Stephensen 1935; this study).
Remarks. According to Åse Wilhelmsen, ZMUO (2013 in litt.), only one sample of Lysianella petalocera from the G.O. Sars collection exists in the ZMUO in Oslo, with the locality “ N. m Finm.” This sample is not registered in the type collection. “ N. m ” may mean Norvegia meridialis (Southern Norway) and “ Finm.” may refer to Finmark, northern Norway. It is most likely Finmark, as L. petalocera has previously been collected from there at Mehavn, near Nordkap (G.O. Sars 1890) and therefore is not part of the type series.
Distribution. Norway. Lyngdalsfjorden, Farsund to Mehamn, Finmark (Sars 1890; Stephensen 1935). Russia. South-western Barents Sea (Gurjanova 1951).