(2009): Lichens in Scandinavia known mainly from Norwegian type ...

GRAPHIS SCRIPTA 21 (2009) Lichens mainly known from Norwegian types 12
This is another of the lecideoid Lecanoraceae
of the L. elata-group. H. Hertel (pers. comm.)
regards it as best placed in Lecanora formosa
(Bagl. & Carestia) Knoph & Leuckert, even
though the thallus lacks psoromic acid (cf.
Knoph & Leuckert 2000). This would mean a
most interesting addition to the relic arcticalpine
element in the Oslofjord region. Hopefully
better specimens can be found to confirm
the identity of the scanty and poorly developed
material.
Lepraria bergensis Tønsberg
Type: Norway, Hordaland, Bergen, Haukeland/
Landås, Vognstølen, base of hill Ravneberget,
2000, T. Tønsberg 2885 (BG!, holotype).
Recently described species, belonging in the
difficult L. neglecta complex. Though originally
only known from one other locality in the
Bergen region, recent discoveries further south
in Norway as well as in England and Germany
(Spribille & Tønsberg 2007) prove that it is a
more widespread, though rare species. It is still
extant in the type locality within the city of
Bergen.
Metamelanea caesiella (Th.Fr.) Henssen
Type: Norway, Sør-Trøndelag, Dovre, Drivstuen,
1864, Th. M. Fries (UPS!, holotype of
Pyrenopsis caesiella Th.Fr.).
This must be a truly rare species. It is quite
distinct and characteristic (Henssen &
Jørgensen 1990) and not difficult to detect. It
has actually been collected in a second locality
in Norway, in Hovedøya near Oslo, and
distributed by Havaas in his exsiccate (449). It
has, however, not been recollected in any of
these localities in recent years. M. caesiella
appears to belong in a group of xerophilous
lichens favoured by high summer tempratures.
It has recently been discovered for the first
time outside Norway in the Ardennes (leg. P.
Diederich & van den Boom, M. Schulz pers.
comm.) and Schwäbische Alpen (Schulz et al.
2007), which confirms its status as a rare,
overlooked species. The original spelling of the
generic name is Metamelanea, and the often
used form Metamelaena (e.g. in Santesson et
al. 2004) is incorrect.
Micarea lynceola (Th.Fr.) Palice
Type: Norway, Akershus, Christiania (Oslo),
Tveten, 1868, N.G. Moe 257 (UPS!, holotype
of Lecidea lynceola).
This is an exceptionally small lichen which
requires the eyes of a lynx to be discovered
(hence the epithet), closely related to M.
bauschiana. It is also a transient pioneer, so it
is no wonder that M. lynceola has only been
collected once in Scandinavia. Palice (1999)
also reports it from a few localities in Central
Europe, so it is not endemic to Norway. The
type-locality itself is engulfed by the city Oslo
and at present unsuitable as a lichen site.
Micarea osloënsis (Th.Fr.) Hedl.
Type: Norway, Oslo, Ryenbjerget, 1847, N. G.
Moe (UPS!, holotype of Lecidea osloënsis, Fig. 9).
This tiny lichen, which was collected on soil in
remnants of a bonfire, is easily confused with
Figure 9. Micarea osloënsis, part of holotype.
Bar = 0.5 mm.