° References of the most recent publications

Diagnosis

Last update: October 29, 2025   Extended specimens about 70-80 mm (fixed specimens without ampulla, diameter about 0.8-1 mm. Colour yellowish. Lophophore horseshoe-shaped with ends turned medially. Up to 150 tentacles, length 1-2.5 mm . Nephridia with a single funnel, with a short descending branch and a long ascending one; nephridiopore on anal papilla below anus on collar fold within the invagination. A single giant nerve fibre, on the left side at the level of the attachment of the left lateral mesentery to the body wall, 10-15 μm in diameter. Longitudinal muscle bundles of feathery type; the general formula is: 33-36 | 29-33  18-21 | 14-17 n= 4 individuals Sexual reproduction: dioecious; no nidamental glands, large membranous lophophoral organs. Phoronopsis deprofundis is embedded vertically in silty sediments, depth rage is 786 - 1551 m. Etymology: deprofundis means living in the deep sea, i.e., “from profundal zone”. The distribution of Phoronpsis deprofundis is represented below on the map. Type-locality: Okhotsk Sea, Russia. No other data. © Christian C. Emig Last update:29 0ctober 2025

Most recent published diagnoses  Neklyudov B., Osipova Z., Galkin S., Belan T. & E. Temereva, 2026. First record of deep-sea phoronids from the Sea of Okhotsk with description of Phoronopsis deprofundis sp.nov. and phoronidization of the ocean communities. Progress in Oceanography, 240 (103592) online. References on Phoronopsis deprofundis