Slideshow image
Wahlenbergiella striatula (Wahlenb.) Gueidan & Thüs (redirected from: Verrucaria striatula)
Family: Verrucariaceae
[Verrucaria melas Herre,  more]
Wahlenbergiella striatula image
Life habit: lichenized (mutualistic with algal photobionts) thallus: crustose (crustaceous) – episubstratal – unspecified thallus: continuous, diffuse, effuse | cracked, fissured, fractured, rimose [th] upper surface: black(ish) | green(ish) | green(ish) black [th upper surface]: epruinose [th marginal and upper surface] specific structures: absent [th] morphol substructures (eg areoles, lobes, branches) upper surface: smooth, plane | rugose, plicate, folded, pustulate, faveolate, wrinkled | pseudocyphellate, with pseudocyphellae ascomata: absent | present ascoma: perithecial, perithecioid – hymenial ascoma [mm]: (min) 0.18 (low) 0.2 (high) 0.3 (max) 0.36 ascoma: subsessile, subimmersed, adnate, semi-immersed, emergent | sessile, superficial [ascm, if apoth] margin surface; [if perith] periostiolar area, ostiole, involucrellum: black(ish) [ascm, if apoth] margin excipular photobionts: absent [ascm] paraphyses/-oids: absent | present asci: fissitunicate – verrucarialean [asc] tholus: thickened [asc] tholus amyloidity (iodine reaction): absent ascospores: (median) 8.0 [asp] shape: subglobose, subspherical | ellipsoidal | ovoid, ovate [asp] length [µm]: (min) 7.0 (low) 8.0 (high) 11.0 (max) 12.0 [asp] width [µm]: (min) 4.0 (low) 5.0 (high) 6.0 (max) 7.0 [asp] septa: absent – spore lumen unilocular, monolocular [asp] pigmentation: hyaline, colourless [asp] perispore, epispore: not apparent conidiomata: absent | present [co] length [µm]: (low) 2.9 (high) 4.1 secondary metabolites: absent primary photobiont: present secondary photobionts (eg in cephalodia): absent primary photobiont: chlorophytaceous – trebouxiaceous, chlorococcoid.

substrate: rock – siliceous, siliciferous, acidic | rock – calcareous, calciferous, basic | rock, stones, pebbles – unspecified.