WoRMS source details

Bakken, T.; Oug, E.; Kongsrud, J. A. (2013). Occurrence and distribution of Pseudoscalibregma and Scalibregma (Annelida, Scalibregmatidae) in the deep Nordic Seas, with the description of Scalibregma hanseni n. sp. Zootaxa. 3753(2): 101.
172710
10.11646/zootaxa.3753.2.1 [view]
Bakken, T.; Oug, E.; Kongsrud, J. A.
2013
Occurrence and distribution of<em> Pseudoscalibregma</em> and <em>Scalibregma </em>(Annelida, Scalibregmatidae) in the deep Nordic Seas, with the description of <em>Scalibregma hanseni</em> n. sp.
Zootaxa
3753(2): 101
Publication
World Polychaeta Database (WPolyDb). Open access PDF
Until recent years, only a few scalibregmatid species have been known from the Nordic Seas, largely from shelf and coastal waters. Access to a large collection from deep areas has made it possible to provide more knowledge on the diversity of this group in the area. Pseudoscalibregma parvum (Hansen, 1879) is here redescribed. The species has a wide geographic distribution in the Nordic Seas, the Barents Sea, and the Kara Sea. Type specimens of Eumenia longisetosa Théel, 1879 were found to be similar to specimens of P. parvum, confirming the synonymy of the species. A new species, Scalibregma hanseni n. sp., is described from specimens found on the continental slope. It is particularly characterised by having three pairs of rather simple branchiae. Both P. parvum and S. hanseni have small spines in the most anterior chaetiger(s), resembling spines reported from a few other Pseudoscalibregma and Scalibregma species and supporting the need to emend the genus diagnosis of Pseudoscalibregma. Scalibregma abyssorum Hansen, 1879 was reassessed and considered to be a nomen dubium. Scalibregma inflatum, which has a wide distribution along the Norwegian coast and continental shelf, is found to be restricted to depths above about 900 m. Depths from 600–800 m on the continental slope represent a transition zone with fluctuations between temperate North Atlantic water (about 7°C) and cold Norwegian Sea water (below 0°C). The three species coexist in this zone, whereas P. parvum and S. hanseni n. sp. extend down to 1700 and 1200 m, respectively, on the slope at temperatures below 0°C.
Arctic-Boreal marine
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Date
action
by
2014-01-14 11:24:59Z
created
2014-01-16 08:57:10Z
changed
2014-01-16 22:05:33Z
changed

Holotype ZMUB ZMBN 94016, geounit Norwegian part of the Norwegian Sea, identified as Scalibregma hanseni Bakken, Oug & Kongsrud, 2014
 Depth range

Depths from 20 to 1715 m. The shallowest records are all Arctic, from East Greenland and the Kara Sea. [details]

 Diagnosis

As emended (Baaken et al 2014) "Body elongate, posterior part tapering (‘arenicoliform’). Prostomium T-shaped ... [details]

 Distribution

East Greenland, Jan Meyen, Spitsbergen, Norwegian Sea and Kara Sea. [details]

 Distribution

Continental slope in the eastern Norwegian Sea, deep areas around Jan Mayen, and Wyville-Thomson Ridge. [details]

 Distribution

Baaken et al (2014:110) "Scalibregma inflatum is reported from world-wide areas (Blake 1981). Most probably several ... [details]

 Etymology

The species is named after Gerhard Armauer Hansen for his contribution on polychaetes in the Norwegian Sea.  [details]

 Lectotype

The syntypes used by Hansen (1879) to describe the species from stations 18 and 31 from The Norwegian ... [details]

 Reproduction

Several ovigerous females observed in 08 January 1895 (R/V "H. Mosby" Sta. 85.01.08.1; 701 m deep; -0.9ºC; Norwegian ... [details]

 Reproduction

Ovigerous females observed in samples from continental shelf break off Nordland County at 68ºN, 765 m, October ... [details]

 Type locality

Norwegian continental shelf break, 'Egga', west of Nordland County, 68º50.42'N, 13º05.22'E, 765 m.  [details]

 Type locality

Atlantic Ocean, Norwegian Sea, off the coast of western Norway, at 63º10'N, 04º00'E, 763 m deep.  [details]

 Type specimen

Baaken et al (2014) examined the only type specimen and believe "that the deposited specimen is not the one Hansen ... [details]