Fróðskaparrit - 01.01.2006, Page 163

STAKIR SJÓBJØLGAR (TUNICATA, ASCIDIACEA
OG SORBERACEA) VIÐ FØROYAR
161
Remarks: P. tessellata, P. squamulosa (Alder, 1863) and
P microcosmus (Savigny, 1816) (= P. savignyi) are
related members of Pyura with similar distribution.
The three species are distinguished primarily by dif-
ferent number of gonads and folds in the branchial
sac.
Family: MOLGULIDAE
Genus: Molgula Forbes, 1848
Before the BIOFAR project the number of Molgula
species recorded in the Faroese EEZ was relatively low,
a fact that had bccn noticed by other authors (Ámback-
Christie-Linde, 1952; Hartmeyer, 1923; Thompson,
1930). A doubling of the species recordcd by the BIO-
FAR project (from three to six species) was thereforc
anticipated. The new EEZ ntolgulids are M. herdmani
Bjerkan, 1905,M mira (Árnbáck, 1931), andM occulta
Kuppfer, 1875.
Molgula citrina Alder and Hancock, 1848
Figure 40. Molgula citrina (from Liitzen, 1967).
Good description: Hartmeyer, 1923: 97-105; VanName,
1945; Millar, 1966: 108, fig. 76.
Previous records: East of Nólsoy, 75 m (62°02'30
N;06"29'W) (Thompson, 1930).
BlOFAR stations (numbcrof individuals in parentheses):
1628(3); 1638(1); 1665(2); 1670(3).
BIOFAR area: Four coastal records (Fig. 41).
BIOFAR depth range: 5-10 m.
BIOFAR temperature: Unknown.
BlOFAR water mass: AW.
North Atlantic/Nordic Seas distribution: Svalbard; Nor-
wegian cost; western coast of Sweden; Denmark;
North Sea; Channel coast of France; coasts of Great
Britain; Ireland; Shctland; Faroes; Iceland; northcrn
NorthAmerica (Millar, 1966).
General distribution: M citrina is recorded on both sides
of the boreal Atlantic and in Arctic areas bordering
the boreal Atlantic; Western Greenland; Svalbard; and
White Sea.
General depth range: From shallow water to about 60 m,
occasionally below 200 m (Millar, 1966).
Remarks: The phylogenetic analyses made by Huber et
al. (2000) place M. citrina in the so called Roscovi-
tae clade together with M. echinosiphonica Lacaze-
Duthiers, 1877; M. oculata Forbes, 1848; M. occulta;
and M. bleizi (Lacaze-Duthiers, 1877) (all endemic
to Europe), and M. paciftca (Huntsman, 1912) (en-
dentic to boreal eastern Pacific).
Molgula complanata (Alder and Hancock,
1870)
Figure 42. Molgula complanata (frorn Lutzen,
1967).
Good description: Hartmeyer, 1923: 76-83; VanName,
1945; Millar, 1966: 104, fíg. 72.
Previous records: Rowingboat sample by Japetus Steen-
strup 1844?: Sandavágur 9-18 m. identified by Steen-
strup 1858 (Hartmeyer, 1923). "Thor" 1899: Be-
tween Stong and Eystnes 180 m. Identified by Th.
Mortensen (Hartmeyer, 1912). “Beskytteren ” 1926:
Vestmannasund 45 m (Árnback-Christie-Linde,
1952).
BIOFAR stations (nurnber of individuals in parentheses);
1017(4); 1019(1); 1022(1); 1130(1); 1592(2);
1602(2); 1612(8); 1638(1); 1663(1); 1664(1);
1665(6); 1706(1); 1750(2); 1801(14) (in addition to
these records, 1 indiviđual of M. complanata is iden-
tified, that cannot be locatcđ to station).
BIOFAR area: Mainly coastal records. A few records east
offSlong and Eystnes (Fig. 43).
BIOFAR depth range: 5-65 m.
BIOFAR temperature: Unknown.
BIOFAR water mass: AW.