Onchnesoma steenstrupii subsp. steenstrupii steenstrupii Koren and Danielssen 1876

• Main Author: Saiz-Salinas, J. I.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2007
• Subjects: Biodiversity; Taxonomy; Animalia; Sipuncula; Sipunculidea; Golfingiiformes; Phascoliidae; Onchnesoma; Onchnesoma steenstrupii; Onchnesoma steenstrupii steenstrupii koren and danielssen; 1876; Blunt Point; Cutler; Indian; Koren; Pacific; North Atlantic
• Online Access: https://zenodo.org/record/5233592; https://doi.org/10.5281/zenodo.5233592

Onchnesoma steenstrupii steenstrupii Koren and Danielssen, 1876 Material. Sta. EBS no. 318, two. Description. Trunk 2–4.5 mm long and 1–2 mm wide. Introvert 3–5 mm in length and 1 mm in width. Pyriform in appearance with the posterior end finished in a blunt point. Over the surface of the trunk are conspicuous small wart-like papillae. Several longitudinal keel-like structures on the end of the trunk. A single retractor originates from the end of the trunk. Remarks. The presence of small papillae covering the surface of the trunk and the keel-like structures on the posterior end of the trunk are diagnostic for this species. The species is common in the North Atlantic Ocean and is known also in the South Atlantic, Indian and Pacific Oceans at depths of 0–2990 m. It has been found previously in the investigated area by Cutler and Cutler (1987), but at bathyal depths. Finding our specimens at 5126 m extends the vertical known range of this species to abyssal depths. Published as part of Saiz-Salinas, J. I., 2007, Sipunculans and echiurans from the deep Angola Basin, pp. 2789-2800 in Journal of Natural History 41 (45 - 48) on page 2794, DOI:10.1080/00222930701782187, http://zenodo.org/record/5233566