Halicnemia verticillata, (BOWERBANK, 1866)

Morrow, Christine, Cárdenas, Paco, Boury-Esnault, Nicole, Picton, Bernard, Mccormack, Grace, Soest, Rob Van, Collins, Allen, Redmond, Niamh, Maggs, Christine, Sigwart, Julia & Allcock, Louise A., 2019, Integrating morphological and molecular taxonomy with the revised concept of Stelligeridae (Porifera: Demospongiae), Zoological Journal of the Linnean Society 187, pp. 31-81 : 59-60

HALICNEMIA VERTICILLATA ( BOWERBANK, 1866)

( FIG. 14A–F)

Bubaris verticillata ( Bowerbank, 1866)

Hymeraphia verticillata Bowerbank, 1866 (p. 145–146) Laonaenia verticillata ( Bowerbank, 1866)

Naenia verticillata ( Bowerbank, 1866)

Material examined: Syntypes BMNH 10.1.1.2389– 2392, Porcupine Expedition 1868, 345 fathoms (631 m), 40 miles NNW of Shetland, Norman Collection (slide only) .

BMNH 10.1.1.2388, Trondheim, Norway, Norman Collection (slide only).

BMNH 1406.70.5.3.21, Marquesas, Florida ( Schmidt, 1870).

BELUM Mc6786, Boue Tirlipois, Channel Isles, 49°24.427′N, 2°23.183′W, 36 m, 25 June 2010, coll. B. Picton, det. C. Morrow.

BELUM Mc 5018, Galway Bay, Ireland, 53°15.080′N, 9°59.420′W, 38 m, 17 August 1993, coll. C. Morrow, det. C. Morrow.

BELUM Mc 2018.4, Whittard Canyon, Ireland, 54°03.36′N, 12°33.28′W, Event 15, 1400 m, 4 June 2013, coll. C. Morrow, det. C. Morrow.

Field # 40-10(6), off Tromsø , Sotbakken, Northern Norway, 70°45.46′N, 18°40.48′E, Polarstern ARK-XXII/1a expedition, van veen grab, station 40-10, 18 June 2007, 273 m, coll. P. Cárdenas., det. P. Cárdenas.

Description: (BMNH 10.1.1.2389) Megascleres: Large tylostyles 2–3 mm × 4–7 µm (N = 4), tylostyle head 10–16 µm ( Fig. 14A).

A c c e s s o r y o x e a s: C e n t r o t y l o t e o x e a 6 0 0 – 800 µm × 5–10 µm; centrotylote swelling 10–17 µm. The centrotylote oxeas have distinctive fissurate ends ( Fig. 14C).

Microscleres: Acanthoxeas in a wide range of sizes (50– 400 µm × 5–10 µm), with spines arranged in verticils ( Fig. 14D).

Reproduction: The presence of oocytes was observed in BELUM Mc6786, collected in June from the channel Islands, 36 m.