Ophryotrocha scutellus Wiklund, Glover & Dahlgren, 2009, sp. nov.

• Main Authors: Wiklund, Helena, Glover, Adrian G., Dahlgren, Thomas G.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2009
• Subjects: Biodiversity; Taxonomy; Animalia; Annelida; Polychaeta; Eunicida; Dorvilleidae; Ophryotrocha; Ophryotrocha scutellus; Norway; minke whale; North Atlantic
• Online Access: https://doi.org/10.5281/zenodo.5698106; http://treatment.plazi.org/id/03C487F9FFBBFFFAA088166BFF07FDC7

Ophryotrocha scutellus sp. nov. (Figs 1 A–D) Material examined: Northern North Atlantic, coastal Skagerrak, 58° 53.1’ N; 11° 06.4’ E, female with eggs, 6 mm long, 29 chaetigers, preserved in formaldehyde from experimental tank with bone material sampled from a minke whale carcass, which was implanted at 125 m depth, holotype (SMNH T- 7816); same location, 2 specimens, preserved in formaldehyde, paratypes (NHM2009.25); same location, one specimen preserved in osmium for SEM, and several specimens preserved in ethanol for DNA extraction. Fishfarm in Mele, Hardangerfjord, 60°21.27’N; 6°20.89’E, 104 m depth, several specimens preserved in formalin. Description: Body shape elongated, uniform width for majority of body length, tapering slightly at posterior end. Colour transparent, with white eggs visible in females. (Fig. 1 A). Prostomium round and dorso-ventrally flattened, disc-like. Eyes lacking. Long cirriform paired antennae inserted dorsally, reaching to first chaetiger, equally long palps cirriform inserted lateroventrally on prostomium. Jaws of P-type, mandibles rod-like without any serration. Maxillae with seven pairs of free denticles (Fig. 1 B). Two peristomial achaetous segments. Parapodia uniramous with long dorsal and ventral cirri and cirriform acicular lobe, supraacicular chaetae simple, subacicular chaetae compound with serrated blades (Figs 1 C–D). Subacicular chaetal lobe with simple chaeta. Pygidium with terminal anus, two pygidial cirri as long as antennae and palps laterally and a short, nublike unpaired appendage ventrally. Distribution: Known from a minke whale carcass at 125 m depth (58°53.1’N; 11°06.4’E) in the Koster area in Sweden, and from sediment sampled at 104 m depth beneath a fish farm in Hardangerfjord (60°21.27’N; 6°20.89’E) in Norway. Reproduction: Eggs present in females from chaetiger 5 and in all segments to posterior end of body. No data available on the presence of sperm. Ecology: Live observation in aquarium experiments show adult specimens crawling on filamentous bacterial ...