Fróðskaparrit - 01.01.1999, Blaðsíða 236

240
ECHINODERMATA, ASTEROIDEAIN THE FAROE AREA
Bathymetrical range within the area: 252 - 600 m
Substrate: hard bottom, sand, gravel.
Temperature: 7.0° - 8.3°C (estimated)
Watermass: AW
World distribution: From the Trondheimsfjord in W.
Norway, Skagerrak, Shetland and Lousy Bank
south to North Spain.
World bathymetrical range: 10- 1,000 m, most com-
mon above a 200-300 m depth (Mortensen 1927)
Remarks: It has been discussed whether or not Mar-
ginaster pectinatus is a juvenile form of Porania
pulvillus, and whether or not the five described
species of Marginaster can be synonymised. There
has also been discussion as to whether or not M.
capreensis is distributed both in the Mediterranean
and in the Atlantic (see Downey 1973).
Genus Poraniomorpha Danielssen and
Koren, 1881
Poraniomorpha bidens Mortensen, 1932
(Map 4)
Reference to best description of the species:
Mortensen (1932: 9-12)
BioFar stations: 563 (3), 564 (1)
Other records: Faroe-Shetland Channel: 60°40’N,
04°50’W; 60?25’N, 04°31’W and 60°06’N,
05°50’W (Clark and Downey 1992)
Bathymetrical range within the area: 1,030 - 1,500 m
Substrate: softbottom
Temperature: -0.86°C (measured)
Watermass: NW
World distribution: Probably circumpolar: From
Northem Canada and Westem Greenlanđ and from
Cape York south to Umanák, Kara Sea and the
cold area of the Faroe-Shetland Channel at bottom
temperatures between -0.2 and 1.1 °C (Mortensen
1932).
Worldbathymetricalrange: 910-1,llOm
Poraniomorpha tumida (Stuxberg, 1878)
(Map 5)
Reference to best description of the species:
(D’yakonov 1950); Stuxberg (1878)
BioFar stations: 122 (1), 172 (1), 269 (1), 294 (1), 424
(1), 425 (1), 474 (1)
Other records: north-east of the Faroe-Shetland Chan-
nel (D’yakonov 1950)
Bathymetrical range within the area: 246 - 1,096 m
Substrate: sand, gravel, stones
Temperature: -0.1° - +1.0°C (measured); estimated: -
O. 84°-+7.1°C
Water mass: AW/AI/ AI, AI/NW, NW
World distribution: North-east of the Faroe Channel,
west coast of Greenland, Denmark Strait, the Nor-
wegian Sea to the Kolafjord, the White Sea, Kara
Sea, Laptev Sea, East-Sibirian Sea and east to 161°
E (D’yakonov 1950).
World bathymetrical range: 15 - 1,200 m
Remarks: Mortensen (1927) points to the difference
between P. hispida and P. tumida where the disk of
P. tumida is covered with fine, rounded grains, and
the lower marginals and oral interradial plates are
without spines.
Poraniomorpha hispida (M. Sars, 1872)
(Map 5)
Synonyms: Goniaster hispidus M. Sars 1872; Poran-
iomorpha hispida Oestergren 1904; Poraniomor-
pha (Poraniomorpha) hispida hispida A.M. Clark
1984
Reference to best descriptions of the species: Clark
and Downey (1992: 216-217, Pl. 51a-e)
BioFar stations: 49 (1), 68 (1), 97 (2), 117 (1), 119 (2),
234 (1), 268 (1), 282 (1), 332 (1), 341 (1), 346 (1),
353 (1), 354 (1), 401 (1), 420 (1), 421 (1), 474 (2),
495 (1), 536 (1), 540 (3), 738 (1)
Other records: Faroe-Shetland Channel (Bell 1892);
Lousy Bank and south-west of Ireland (Mortensen
1927) in depths from about 90 to 1,170 m
Bathymetrical range within the area: 241 - 749 m
Substrate: sand, gravel, stones
Temperature: 2.6°C (measured); estimated: 2.5° -
8.2°C
Water mass: AW, AW/AI, AI
World distribution: Arctic south to Cape Cod in the
Western Atlantic; in the Eastem Atlantic along the
Norwegian coast south to Bohuslan in Sweden.
World bathymetrical range: 90 - 1,170 m
Remarks: According to D’yakonov (1950) there is an
infraspecific overlap between P. hispida and P. tu-
mida in noithem Norway and the Barents Sea.
Clark and Downey (1992) write: “Indeed, much re-
mains to be done to establish the precise limits or
the possible extent of overlap of the infraspecific
divisions of P. hispida.”