Diplopathes multipinnata Opresko & Stewart & Voza & Tracey & Brugler 2022, sp. nov.

• Main Authors: Opresko, Dennis M., Stewart, Rob, Voza, Tatiana, Tracey, Di, Brugler, Mercer R.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2022
• Subjects: Biodiversity; Taxonomy; Animalia; Cnidaria; Anthozoa; Antipatharia; Schizopathidae; Diplopathes; Diplopathes multipinnata; Antarc*; Antarctic; Ross Sea
• Online Access: https://doi.org/10.5281/zenodo.6911253; http://treatment.plazi.org/id/E9265730FF95FFBFFF40FAA00C02120D

Diplopathes multipinnata sp. nov. Opresko & Stewart (Fig. 1, 4) Material examined. Holotype : NIWA 88617, Stn TRIP3883 /55, 34.2 S, 162.7 E, Lord Howe Rise, South West Pacific, 478‒685 m, 10 October 2013 (USNM 1491425, SEM stub 457, Genbank ON572256). Other material : NIWA 95270, Stn TRIP4543 /5, 64.5 S, 177.6 E, Ross Sea, Pacific Antarctic Ridge, 1048.0–1477.0 m, 3 December 2015; NIWA 95271, Stn TRIP4543 /8, 64.2 S, 177.6 E, Ross Sea, Pacific Antarctic Ridge, 1677.0–1636.0 m, 4 December 2015; NIWA 95273, Stn TRIP4543 /8, 64.2ºS, 177.6 E, Ross Sea, Pacific Antarctic Ridge, 1677.0–1636.0 m, 4 December 2015. Type locality. Lord Howe Rise, 478‒685 m. Distribution. Lord Howe Rise in the SW Pacific, and the Ross Sea, Pacific Antarctic Ridge (Fig. 1); 478–1636 m. Diagnosis. Corallum planar and densely branched to second and third order; pinnules bilateral and alternating, usually less than 1 cm long (maximum 3 cm); pinnular density 11–16 per 3 cm (total for both rows); polypar spines up to 0.1 mm tall; abpolypar spines up to 0.09 mm tall; 4–5 spines per mm in each row; polyps up to 4 mm in transverse diameter; polyp density 2.5 per cm. Description. The holotype (NIWA 88617) is a complete colony approximately 28 cm tall and 17 cm wide, with a basal stem diameter of about 2 mm (Fig. 4A). It is branched mostly to the second order. The stem and branches are pinnulate; the pinnules are placed in two lateral rows and also arranged in an alternating pattern; there are no signs of more than two rows of pinnules on any part of the corallum. The unpinnulated basal part of the stem is 2.4 cm long, and the stem extends to the top of the corallum. Most of the pinnules originating on the stem are developed into pinnulated branches which can be 10 cm or more in length. On the lower part of the stem the pinnules are 3.6–4.4 mm apart on each side of the axis, resulting in a total of 15–16 pinnules per 3 cm. A similar pinnular density occurs on the upper part of the stem and on most of the branches; although in a few locations the ...