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Ampharete vega (Wirén, 1883)

Forrige Opp Neste

Ampharete vega can be up to 50 mm long. It lives in shallow soft bottom habitats in the Arctic, but there are no recent records of this species from Norwegian waters.

Type locality

Arctic Ocean (Dikson harbour, 73o30’N 80o58’E, 7–9 m; 73o41’N 114o58’E, 11 m; 69o22’N 177o28’E, 7 m; 67o7’N 176o6’E, 7–11 m).

Key characters

Measurements: Up to 50 mm long.

Number of thoracic chaetigers, excluding paleae: 14

Number of thoracic uncinigers: 12

Number of abdominal uncinigers: 26

Prostomium: Trilobed; one pair of eyespots.

Mouth tentacles: Papillose.

Branchiae: Four pairs of branchiae in one transverse row without median gap.

Paleae: As long as longest notochaetae; with filiform tips.

Special features: Anterior two to three abdominal segments with conspicuous rudimentary notopodia.

Pygidium: With two short lateral cirri and several small papillae.

Tube: Made of mud and sand mixture with few scattered embedded large particles.

Distribution

Arctic Ocean; 4–19 m (Jirkov 2001).

Remarks

The only records of Ampharete vega in Artskart, from Svalbard, dates back to the Swedish Arctic expedition in 1898. There are no recent records of the species in Norwegian waters. This might be due to very little sampling of Arctic shallow soft bottom habitats.

Similar species

The precense of paleae, in combination with the large number of abdominal uncinigers (26) makes it unlikely to confuse adult complete specimens of Ampharete vega with any other Ampharetidae in Norwegian waters.

Sources

Holthe T (1986a). Polychaeta Terebellomorpha. Marine Invertebrates of Scandinavia 7: 1-192.

Jirkov IA (2001). [Polychaeta of the Arctic Ocean] (In Russian). Polikhety severnogo Ledovitogo Okeana. Yanus-K Press. Moscow, 632 pp.

Wirén A (1883). Chaetopoder från Sibiriska Ishafvet och Berings Haf Insamlade under Vega-Expeditionen 1878-1879. Vega-Expeditionens Vetenskapliga Iakttagelser bearbetade af deltagare i resan och andra forskare, Stockholm, F&G Beijers Förlag 2: 383-428, plates 27-32. https://biodiversitylibrary.org/page/27392832

Siden siteres som:

Alvestad T og Budaeva N (2020). Ampharete vega (Wirén, 1883). www.artsdatabanken.no/Pages/299302. Nedlastet <dag/måned/år>