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

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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.
13 Per Magnus Jørgensen & Anders Nordin GRAPHIS SCRIPTA 21 (2009) Placynthiella uliginosa. This does not, however, explain its rarity. Even if the locality is now engulfed in the city of Oslo, there should be plenty of fireplaces in the region where it would be able to grow. It has as yet only been found once, but Coppins (1983) in his thorough monograph of the genus, accepted it as a species, so this is one of the truly rare lichens, as yet only known from Norway. Pertusaria porospora Norman ex Erichsen Type: Norway, Finnmark, Porsanger, Rassebakte, in the Lakselv valley, 1871, J. M. Norman (O!, holotype). TLC: lecanoric acid and xanthones. Erichsen’s description of this species is based on Normans’s handwritten diagnosis and his drawing of the spores (Fig. 10) that are attached to the type specimen. Norman apparently had a second specimen available (‘ad Troldfj., Tanen’), but that has not been traced. At present the type lacks asci, so the characteristic, large (to 250 µm), thick-walled, pored spores drawn and described by Norman have not been observed by us. Erichsen (1936) placed it close to P. dactylina which is neither in accordance with the chemistry nor the unusual spore wall. Most probably it is an esorediate form of Varicellaria rhodocarpa of which Norman collected typical material in the same locality, but on a different tree (BG). According to Tønsberg (1992) V. rhodocarpa lacks soredia in its most reduced states. Figure 10. Pertusaria porospora, Norman’s drawing of a spore in the type collection. Figure 11. Polyblastia sakkobanensis, part of holotype. Bar = 0.5 mm. Polyblastia sakkobanensis Zschacke Type: Norway, Finnmark, Sakkobani, 1917, B. Lynge (O!, holotype, Fig. 11). A most interesting, easily overlooked species with poorly developed thallus. According to Savić & Tibell (2007) it is most possibly a species of Sporodictyon, closest related to S. minutum S.Savić & Tibell. It has not been found recently and is in urgent need of recollection. Polyblastia subocellata Th.Fr. Type: Norway, Sør-Trøndelag, Dovre, Kongsvoll, 1863, Th. M. Fries (UPS!, holotype). This is a rather nondescript, terricolous species, only known from the small type specimen. According to Savić & Tibell (2007) it is certainly a Sporodictyon closely related to S. terrestris (Th.Fr.) Savić & Tibell, but with a thin, whitish, leprose thallus. Since there is a great variation in thallus appearance in Sporodictyon, its taxonomic status is uncertain. It has in vain been searched for recently in the type locality by Savić and Tibell.
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(2009): Lichens in Scandinavia known mainly from Norwegian type ...

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