Turbicellepora hansenae Denisenko, 2016, sp. n.

Turbicellepora hansenae sp. n. (Fig. 2 a–g)

Material examined. Holotype: ZMUC-BRY-104, fragment of colony, collected by a Canadian expedition research vessel, the Canadian Coast Guard Ship Martha Black at 60°22.3' N, 48°22.19' W, 886–932 m, March 2012.

Etymology. Honorific for the late Danish bryozoologist Karen Emilie Bille Hansen (6 May 1919 – 27 December 2010).

Description. Colonies somewhat irregular and nodular, slightly yellowish, comprising 30 x 40 mm in size. Zooids semi-vertical in colony, highly distinct owing to deep interzooidal furrows (Fig. 2 a, b), of variable size (0.7–1.0 x 0.5–0.7 mm (Table 1). Frontal shield thick, smooth, with even slope and sparse marginal pores (Fig. 2 c, d). Primary orifice transversely suboval, wider than high with fairly deep wide U-shaped sinus with sloping sides occupying much of proximal border (Fig. 2, b). Peristome of moderate height, rounded, asymmetrical, partly concealing primary orifice (Fig.

2b, d). Oral avicularia 1–2, relatively large, with triangular mandible, located laterally near proximal part of orifice as continuation of peristome. Internal base of avicularian cystid wide, with 3 communication pores located on one side only; terminal (frontal) part of avicularium narrower, approaching form of a truncated cone. Rostrum directed frontolaterally, oval-triangular with tip hooked apically, crossbar complete, lacking columella (Fig. 2 c, e). Additional similar columnar avicularia sporadically developed on frontal shields, these smaller in size, with rostrum directed proximally (Fig. 2 d, e). A third type of adventitious avicularium present in ovicellate zooids, located in distal part of orifice (Fig. 2 d, f), with prominent long, curved cystid, arching over ovicell opening; with complete crossbar and small semicircular mandible. Vicarious avicularium immersed, found only once, drop-like in form, with complete crossbar (Fig. 2 g). Ovicell subglobular, prominent, sometimes with slight peak or crest in central part, with up to 20–25 unevenly distributed pseudopores (Fig. 2 d–f).