Scytinium teretiusculum (Wallr.) Otálora et al.

Moisejevs, Rolands, 2015, Some New To Latvia Lichens And Allied Fungi, Acta Biologica Universitatis Daugavpiliensis 15 (2), pp. 285-292 : 287-288

Scytinium teretiusculum (Wallr.) Otálora et al.

Morphology: Thallus dark grey. Lobes 0,3-0,8x 0,1-0,2 mm. Isidia long, cylindrical 40- 65 μm diam and 0,6-0,8 mm long. Apotecia in Latvian material not found.

Species distribution and ecology: Europe, Macaronesia, N. and C. America, Asia. Corticolous on coarse-barked trees, especially Populus tremula or Juniperus . ( Gilbert & Jørgensen 2009, Jørgensen 2007). Species known from Lithuania and Estonia (Motiejūnaitė et.al. 2005; Randlane & Saag 1999).

Material examined: Latvia, Lubānas region, Daukstas district, About 5km West off Lubāna

City (57°1’N 26°46’E). Broad-leaved forest with Populus tremula . On trunk of Tillia cordata . Old shaded woodland with high humidity ( Fig 2 ). July 22, 2015 ( DAU Nr. 064007001).

+ Microcalicium ahlneri Tibell ( Fig 4.)

Morphology: Apotecia 0,4-0,5 mm tall. Stalk black, head narrowly conical. Ascospore mass green-black with sclerotized hyphae. Ascospores 5-6,5x 2-2,4 μm.

Species distribution and ecology: Known in Europe, N. America, Asia. On decorticated stumps heavily attacked by brown rot fungi, usually of Pinus sylvestris , more rarely on lignum of Picea abies , and occasionally on oak wood. Mainly in humid locations ( Tibell 1999). Recorded from Lithuania and Estonia ( Motiejūnaitė 2007; Randlane & Saag 1999).

M a t e r i a l e x a m i n e d: Latvia, Va l m i e r a s region, Burtnieku district , Nature preserve „Vidusburtnieks”, (57°46’ N 25°14’E). On decaying wood of Quecus robur . Old shaded woodland with high humidity. May 16, 2015 ( DAU Nr. 143001001).

# Microcalicium disseminatum (Ach.) Vain.

( Fig. 5)

Morphology: On thalli of Chaenotheca trichi- alis (Ach.) Th. Fr. Apotecia 0,1-0,3 mm diam., 0,1-0,2 tall, sessile. True exciple aeruginose in section, K + brown. Ascospores 11-13x 3-3,7 μm, 1- to 3-septate.

Species distribution and ecology: Reported from Europe, N. America, Asia. On lignum and bark of both decidous trees and conifers in moderately shaded situations. Often parasitic on calicioid lichens, particularly Chaenotheca species. Also on free-living algal colonies and apparently also occurring saprobically on wood ( Tibell 1999). Species known from Lithuania and Estonia. ( Motiejūnaitė 2003; Randlane & Saag 1999).

M a t e r i a l e x a m i n e d: Latvia, Va l m i e r a s region, Burtnieku district , Nature preserve „Vidusburtnieks”,(57°46’ N 25°14’E). On trunk of Quecus robur . Old shaded woodland with high humidity. May 16, 2015 . ( DAU Nr. 143002001)

Figures

Fig 2. Old woodland from study area.