Ophryotrocha scutellus Wiklund, Glover & Dahlgren, 2009, sp. nov.
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 impla...
| Main Authors: | , , |
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| Format: | Other/Unknown Material |
| Language: | unknown |
| Published: |
2009
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| Subjects: | |
| Online Access: | https://zenodo.org/record/5698106 https://doi.org/10.5281/zenodo.5698106 |
| Summary: | 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 (NHM 2009.25); 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 ... |
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