Diplopathes antarctica 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: 2022
• Subjects: Biodiversity; Taxonomy; Animalia; Cnidaria; Anthozoa; Antipatharia; Schizopathidae; Diplopathes; Diplopathes antarctica; Antarctic; Southern Ocean; Pacific; Scott Seamount; Antarc*; Antarctica
• Online Access: https://zenodo.org/record/6911247; https://doi.org/10.5281/zenodo.6911247

Diplopathes antarctica sp. nov. Opresko & Brugler (Figs 1–3) Material examined. Holotype: NIWA 38070, Stn TAN0802/199, 68.108 S, 179.312 W, Site C 31, Scott Seamount B, Southern Ocean, Pacific Antarctic Ridge, inside 60 o South, 662.0‒605.0 m, 2 March 2008 (USNM 1491422, SEM stub 458; Genbank ON572254). Paratype: NIWA 38674, Stn TAN0802/256, 67.340 S, 179.932 W, Site C 34, Scott Seamount B, Southern Ocean, Pacific Antarctic Ridge inside 60 o South, 1130–1235 m, 8 March 2008 (USNM 1491412, SEM stub 456; Genbank ON572249). Other material: NIWA 38071, Stn TAN0802/199, 68.108 S, 179.312 W, Scott Seamount B, 1130‒1235 m, 08 March 2008; NIWA 38203, Stn TAN0802/256, Site C 31, Scott Seamount B, 67.340 S, 179.932 W, 1130‒1235 m, 08 March 2008; NIWA 38495, Stn TAN0802/237, 67.408 S, 179.809 W, Scott Seamount B, 1520–1560 m, 7 March 2008; NIWA 38639, Stn TAN0802/251, 67.380 S, 179.989 E, Site C 34, Scott Seamount B, 1450–1541 m, 8 March 2008. Type locality. Southern Ocean, Pacific Antarctic Ridge, Scott Seamount B, 662.0‒605.0 m. Distribution. Known only from Scott Seamount B, Southern Ocean,PacificAntarctic Ridge(Fig.1), 605‒1560m. Diagnosis. Corallum planar with very sparse branching to the first order; pinnules bilateral and alternating, usually 2–4 cm long (maximum 7 cm long); pinnular density 16–22 per 3 cm (total for both rows); polypar spines up to 0.1 mm tall; abpolypar spines up to 0.06 mm tall; 3–4 spines per mm in each row; polyps up to 4 mm in transverse diameter; polyp density 2–3.5 per cm. Description. The holotype (NIWA 38070) is about 20 cm tall and about 18 cm wide (Fig. 2A). There is no basal plate, and the stem is pinnulated down to its broken basal end. The corallum has one large branch about 14 cm long and several very short branches; all the branches lie in the same plane as the stem. The pinnules are arranged bilaterally and alternately in two rows. The pinnules do not occur in more than two rows on any part of the corallum. The interior angle formed between the two rows of pinnules is near 180, ...