Fróðskaparrit - 01.01.2006, Blaðsíða 168

166
SOLITARY ASCIDIANS (TUNICATA, ASCIDIACEA
AND SORBERACEA) OF THE FAROES
tioned above, the closest relatives are probably M.
oculata, M. occulta, and M. bleizi, and together with
M. citrina and M. echinosiphonica all these species
probably belong in the Roscovita clade.
Genus: Eugyra Alder and Hancock,
1870_________________________________________
Eugyra arenosa Alder and Hancock, 1848
Gooddcscription: Hartmeyer, 1923:30-39; Millar, 1966:
118, figs. 83b and 84.
Previous records: "Thor” 1899: East off Bispinum 126
m; south of Mykines 126 m. Identifíed by Th.
Mortensen (Hartmeyer, 1923). ‘‘Diana ” 1901: Vest-
manna; Funningsfjørður21-36 m. Identified by Hor-
ring 1901 (Hartmeyer, 1923). “Dana " 1927: Funn-
ingsijørður 75 m (62°18'N;06°53'W) (Árnbáck-
Christie-Linde, 1952).
BIOFAR stations (numbcr of individuals in parentheses):
27(3); 56(5); 76(14); 77(3); 169(1); 170(5); 193(2);
271(1); 356(1); 359(1); 382(1); 480(1).
BIOFAR area: Mainly off shore records on thc plateau
east of the islands; two records from the ridge be-
tween the Norwegian Sea and the Faroe-Shetland
Channel; one in the Faroe-Shetland Channel; two on
Faroe Bank; and two records north of the islands
(Norðhavið and Faroe-Iccland Ridge) (Fig. 45).
BIOFAR depth range: 99-808 m.
Figure 49. Eugyra arenosa (from Liitzen, 1967).
BIOFAR temperatures: Estimated range -0.6 to 9.1 °C.
BIOFAR water mass: NW/AW/Al.
North Atlantic/Nordic Seas distribution: Norwegian
coast; Swedish coast; Skagerak; North Sea; English
Channel; coasts of Great Britain; Shetland; Faroes
(Millar, 1966).
General depth range: From shallow water (Hartmeyer,
1923; Millar, 1966) to 1152 m (Herdman, 1883).
General distribution: E. arenosa is confined to the three
zoogeographic regions of Europe, the boreal, Lusi-
tanian, and Mediterranean.
Remarks: Apart from Herdman’s (1883) record from
deeper waters E. arenosa is found only from shallow
waterto 150 m (Hartmeyer, 1923; Millar, 1966). The
BIOFAR records suggest that the species is more
common in deeper water than previously assumed.
Eugyra islandica Millar, 1974
Good description; Millar, 1974: 150, figs. 1-6.
Previous records: None.
BIOFAR stations (numbcrof individuals in parentheses):
424(51); 478(1).
BIOFAR area: Faroe-Shetland Channel and the Faroe-
Iceland Ridge (Fig. 43).
BIOFAR depth range: 509 and 973 m.
BIOFAR tempcratures: Estimated range -0.80 and 1.5 °C.
BIOFAR water mass: NW and Al.
North Atlantic/Nordic Seas distribution: Faroes (present
study) and lceland (Millar, 1974).
General depth range: The records from lceland arc from
10-15 m(Millar, 1974).
Gencral distribution: As above.
Remarks: E. islandica seem to be an intermediate form
of E. glutinans and the Arctic endemic E. peduncu-
lata Traustedt, 1886 differing from the former by the
number of gonads, and the latter by their structure
(Millar, 1974).
Figure 50. Eugyra islandica (from Millar, 1974).