Macellicephala patersoni Neal & Brasier & Wiklund 2018, sp. nov.

• Main Authors: Neal, Lenka, Brasier, Madeleine J., Wiklund, Helena
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2018
• Subjects: Biodiversity; Taxonomy; Animalia; Annelida; Polychaeta; Phyllodocida; Polynoidae; Macellicephala; Macellicephala patersoni; Amundsen Sea; Pine Island Bay; Southern Ocean
• Online Access: https://doi.org/10.5281/zenodo.5994483; http://treatment.plazi.org/id/03BDA104A337694FFF64FEE3FF4E26E9

Macellicephala patersoni sp. nov. (Figures 2F and Figures 9, 10; Table 2.) Macellicephala sp. B in Neal et al. (2017) [record]. Material examined. Holotype, NHMUK.2018.1009, Pine Island Bay, Amundsen Sea, Southern Ocean, cruise JR 179, station BIO4 -EBS-3D, collected on 07/03/2008, epibenthic sledge, epi-net, 74°23'25.836''S, 104°46'4.512''W, 506 m depth. Description (based on holotype). Medium sized species; holotype complete specimen in good condition, 13.5 mm long, 2 mm wide excluding parapodia and 6.55 mm wide including parapodia, 18 segments (segment 1 = tentacular segment); body dorsoventrally flattened, tapering anteriorly and posteriorly; live specimen not observed; dorsum and everted proboscis purple in alcohol (Fig. 9A), remaining body pale yellow (Fig. 9A, B); ceratophore of median antenna and tentacular cirrophores with distinct purple pigmentation (Fig. 9C). Prostomium bilobed with wide and deep median notch; prostomial lobes slightly pronounced, anteriorly tapering (Figs. 2F and 8C). Frontal filaments distinct, basally slightly inflated, distally slender, extending from tapering prostomial lobes where medially inserted (Figs. 2F and 9C). Eyes absent. Facial tubercle trilobed, composed of three inflated oval lobes, with median lobe larger than lateral lobes (Figs. 2F and 9C). Ceratophore of median antenna massive, bulbous, with purple pigmentation, inserted medially on prostomium (near the base of anterior notch) (Figs. 2F and 9C); style of median antenna very long (longest of all appendages, reaching to beginning of segment 10), smooth and slender. Palps thick, smooth, tapering into slender tips; moderately long (extending to the beginning of segment 6). Tentaculophores large, cylindrical, equal-sized, with purple pigmentation (Fig. 9C), inserted laterally to prostomium, achaetous; all tentacular styles attached, long slender smooth, similar in form, but shorter in length (about 2/3) than style of median antenna; dorsal tentacular cirrus slightly longer than ventral tentacular cirrus. Pharynx ...