Samythella neglecta
Samythella neglecta can be up to 40 mm long. It can be found in the Norwegian Sea, Barents Sea and along the northern Norwegian coast south to Trøndelag at depths between 100 and 1000 meters.
Type locality
Norwegian Sea, 62o44’N 1o48’E, 753 m and 63o5’N 3o0’E, 960m.
Key characters
Head, lateral view
br: branchiae
mt: mouth tentacles
Samythella neglecta partly in its tube.
Measurements: Up to 40 mm long.
Number of thoracic chaetigers: 15
Number of thoracic uncinigers: 12
Number of abdominal uncinigers: Around 30.
Prostomium: Without lobes or glandular ridges; eyespots absent.
Mouth tentacles: Smooth.
Branchiae: Three pairs of branchiae in evenly spaced transverse row.
Paleae: Absent.
Special features: None.
Pygidium: With wreath of about eight conical papillae of different sizes.
Tube: Thin layer of organic secretion incrusted with sand grains.
Special features: Abdominal segments with rudimental notopodia.
Distribution
Norwegian coast south to Trøndelag, Norwegian Sea, Barents Sea; deep (1000m) in Norwegian Sea, moderate (as shallow as 100m) in Barents Sea and Northern Norway.
Similar species
The sandy tube (most other ampharetids in Norwegian waters have muddy tubes), the prostomium without lobes or glandular ridges and the three pairs of branchiae in an evenly spaced transverse row makes it unlikely to confuse adult complete specimens of Samythella neglecta with any other Ampharetidae in Norwegian waters.
Remarks
Jirkov (1986b) proposed a synonym of S. neglecta with Samythella elongata Verill, 1873. However, as pointed out by Salazar-Vallejo & Hutchings (2012), his suggestions are based mostly on non-type material and are poorly illustrated. The synonymization has in general not been accepted.
Sources
Holthe T (1986a). Polychaeta Terebellomorpha. Marine Invertebrates of Scandinavia 7: 1-192.
Jirkov IA (1986). [Analysis of taxonomical features of the genus Samythella (Polychaeta, Ampharetidae)](in Russian). Zoologicheskii zhurnal 65: 325-332.
Salazar-Vallejo SI, Hutchings P (2012). A review of characters useful in delineating ampharetid genera (Polychaeta). Zootaxa 3402: 45-53.
Wollebaek A (1912 (for 1911 year)). Nordeuropaeiske annulata Polychaeta I. Ammocharidae, Amphictenidae, Ampharetidae, Terebellidae og Serpulidae. Skrifter utgit av Videnskapsselskapet i Kristiania. I, Matematisk-naturvidenskabelig klasse, year 1911 part 2 no 18: 1-144. http://biodiversitylibrary.org/page/12042491
Personal observations, Alvestad T.
Siden siteres som:
Alvestad T og Budaeva N (2020). Samythella neglecta Wollebæk, 1912. www.artsdatabanken.no/Pages/299326. Nedlastet <dag/måned/år>