Opegrapha insularis Degel.

Göteborgs Kungl. Vetensk. Samhälles Handl., Ser. B, Math. Naturvensk. Skr. 1(no. 7): 8 (1941).

 

 

Protologue: Prothallus indistinctus. Thallus epilithicus, sat tenuis, continuus, rimulosus vel rimuloso-areolatus, laevigatus, viridis vel cinereo-viridis, opacus, K-. Apothecia numerosa, crebra, pro parte leviter aggregata, sessilia, ad basim non vel leviter constricta, lirelliformia, vulgo non ramosa, oblonga, recta vel (vulgo) + curvata, apicibus + obtusis, vulgo 0.5-0,8 (ad 12) mm longa, 0,2 (ad 0.3) mm lata et 0,15-0,2 mm crassa, nigra, vulgo opaca, epruinosa, disco nigro, rimiformi et demum vulgo sat late dilatato, margine modice elevato, sat crasso. Pycnoconidangia sat sparsa, nigra, + sessilia, + hemisphaerica vel applanata, 0,1 mm lata.
Thallus ex algis trentepohliaceis creberrimis, flavovirescentibus, rotundatis (13-17 µ) vel sat oblongis (ad 23 x 17 µ) vel sat oblongis (ad 23 x 17 µ), membrana modice incrassata (c. 2 µ crassa), et hyphis sat sparsis, c. 2 µ crassis formatus.
Excipulum integrum (non dimidiatum), fusconigrum, in parte margin. (parathecio) 35-65 µ et in parte centr. (hypothecio) 85-110 µ crassum. Hymenium c. 65-75 µ crassum (incl. epithec.), plus minusque J+ caerulescens, epithecio (c. 12-14 µ) fusco, ceterum incoloratum. Subhymenium fere nullum. Paraphyses ramoso-connexae vel pr. p. simplices, sat liberae, indistincte septatae, apicem versus c. 3,5 (-4,5) µ crassae et fuscae, ceterum c. 1,5 µ crassae et incoloratae. Asci cylindrici vel subclavati, c. 38-48 x 8,5-10,5 µ, membrana modice incrassata vel (praecipue apicem versus) sat crassa. Sporae octonae, distichae, anguste oblongae, distincte curvatae vel raro subrectae, apicibus obtusis, 3-septatae, incoloratae, 16-18 x 4.5 µ, cellulis aequalibus. Apothecium intus K-.
Pycnoconidia 4,5-5 x 1 µ, recta.

Protologue type data: Habitatio typi: Insula Terceira, Angra, ad saxum vulcanicum. Leg. 1937 H. Persson Typus in herb. Upsal.

Type locality: Portugal, Azores, Terceira, Angra, basic porphyritic lava rock, 1937, H. Persson (UPS - holotype).

Photobiont: Trentepohlia.

Chemistry: No lichen substances.

Ecology: The species occurred rather abundantly on a basic porphyritic lava rock (Degelius 1941: 9).

Distribution type: The species is only known from the type locality.

Taxonomy: "The new species belongs to sect. Euopegrapha. It differs from all the other known saxicolous species with 3-septate spores in its curved (often rather strongly curved) spores. On the whole, the major part of the species of this genus have straight spores" (Degelius 1941: 9).

Note:

Distribution Database: Distributions

Distribution Database: Discover Life

Picture Database: Tropical Lichens

Molecular Database: Genbank

Synonym Database: Index Fungorum

Synonym Database: Mycobank