Lycopodina minuta, (LAMBE, 1900)

Hestetun, Jon Thomassen, Tompkins-Macdonald, Gabrielle & Rapp, Hans Tore, 2017, A review of carnivorous sponges (Porifera: Cladorhizidae) from the Boreal North Atlantic and Arctic, Zoological Journal of the Linnean Society 181, pp. 1-69 : 48

LYCOPODINA MINUTA (LAMBE, 1900)

( FIG. 37; TABLE 5)

Original description: Esperella minuta Lambe, 1900: 23 .

Synonyms and citations: Asbestopluma minuta ( Hentschel, 1929: 934; Gorbunov, 1946: 37; Koltun, 1959: 78, 1964: 163).

Material examined: GeoBio 2012, st. ROV-04 (28 July 2012, 71°17.799′N, 005°46.436′W, 501 m) st. ROV 14 (1 August 2012, 71°17.907′N, 005°46.364′W, 465 m).

Diagnosis: Small, pedunculate, Lycopodina withlaterally compressed body; mycalostyles to subtylostyles 327– 543 µm, smaller tylostyles 196–294 µm; microscleres palmate/arcuate anisochelae only, 18–19 µm.

Description: Holotype described by Lambe (1900b) as pedunculate sponge with laterally compressed body. Peduncle is 10 mm in length and 3 mm in diameter, attached to the substrate with a basal plate. The body is 3.5 mm in length, 2.75 × 1 mm in width. Several specimens with a similar morphology and spicule complement were collected at the Mid-Arctic Ridge near Jan Mayen. These are pedunculate, 8–22 mm long in total, with a body 2–3 mm in length and 2.5–5 mm in diameter which varies from solid to an uneven cup shape. The body is white to slightly grey, and the stem is either grey or coated in red clay-like sediment ( Fig. 37A–E).

Skeleton : Peduncle composed of parallel mycalostyles with a slight spiral twisting, which become more loosely associated in the body. The shorter tylostyles project from the surface at right angles in the peduncle and slightly upwards in the main body.