Fróðskaparrit - 01.07.2004, Side 52

50
WETLAND COLEOPTERA OF THE FAROEISLANDS
recorded four specimens from Trongisvág-
ur, Suðuroy, in 1915, and one example in
Hestur in 1902. West (1930) notes occur-
rence in streams on Suðuroy and Streymoy,
possibly mainly as larvae, though this is not
entirely clear. Klausnitzer (1996) does not
list this record for the Faroes, possibly con-
sidering previous records to be applicable
to species other than Elodes minuta. An
Elodes larva was found in an exposed
grassy ditch in Klovin, Vágar in June 2004,
but it could not be reared to the adult. An
adult Elodes was found by JH in a spring at
Dysjarnar on Vágoy on 20 June 2004; un-
fortunately it is not identifiable to species
with certainty, being female.
CURCULIONIDAE
Notaris aethiops (Fab.). The only weevil
regularly found in water is N. aethiops, typ-
ically associated with bur-reed (Spargani-
um spp.). However the two Faroese speci-
mens were found in beach debris on San-
doy (West, 1930).
Other records
Brown (1945) noted the occurrence of the
following in pools in October 1943:
Agabus bipustulatus, Hydroporus pubes-
cens, H. palustris, Deronectes griseostría-
tus De G. (= Stictotarsus multilineatus),
Helophorus viridicollis Steph. (= H.
flavipes), and Anacaena globulus. These
were identified by Professor F. Balfour-
Browne. Brown did not specify the islands
on which they were found, but he visited
five: Vágar, Streymoy, Eysturoy, Borðoy
and Suðuroy.
Nilsson (1996) provided an accurate and
conservative checklist of Faroese aquatic
beetles, without adding further data.
Species-Area relationship
Ribera et al. (2003) recently explored the
species-area relationship for aquatic bee-
tles in western Europe, and noted better
predictive fits if the fauna was divided into
its lotic and lentic elements. Reworking the
multilinear regression analysis but includ-
ing the Faroes, Iceland and Greenland
(Table 2) the relationship between species
numbers and the logarithm of area, connec-
tion to the mainland (islands being as-
signed 0), and the minimum latitude is
highly signifícant (r = 0.89, p<0.0001). The
model predicts that there should be no run-
ning water species and eleven stagnant wa-
ter species. The observed values are one
(Anacaena globulus, though occupying
stagnant habitats in the Faroes in addition
to running water sites as further south) and
eleven, respectively.
logA mLat logC logS logRUN logSTA
Greenland 4.34 60.00 0.00 0.70 0.00 0.70
Iceland 2.01 64.50 0.00 1.04 0.30 0.95
Faroe isl. 0.15 61.40 0.00 1.08 0.00 1.04
Table 2. Data additional to Ribera et al. (2003).
A: area (Km2), Lat: minumum latitude, C: connection to mainland., S: total No. species, RUN: running, STA:
standing.