Family: Verrucariaceae
[ Arthopyrenia mesotropa (Nyl.) Arnold , more, Psora minutulum Körb., Thelidium acrotellum Arnold, Thelidium aethioboloides Vain., Thelidium exile Arnold, Thelidium hospitum Arnold, Thelidium mesotropum (Nyl.) A.L. Sm., Thelidium terrestre Walt. Watson, Verrucaria mesotropa Nyl., Verrucaria parvula (Arnold) Stizenb.] |
Life habit: lichenized (mutualistic with algal photobionts) thallus: crustose (crustaceous) episubstratal unspecified thallus: continuous, diffuse, effuse | cracked, fissured, fractured, rimose [th] upper surface: brown(ish) (if pale: fawn, tan; if mid: cinnamon) | green(ish) grey | brown(ish) grey | grey(ish) green [th marginal and upper surface] specific structures: absent ascomata: absent | present ascoma: perithecial, perithecioid hymenial ascoma [mm]: (min) 0.085 (low) 0.1 (high) 0.26 (max) 0.4 ascoma: subsessile, subimmersed, adnate, semi-immersed, emergent | sessile, superficial [ascm, if apoth] margin surface; [if perith] periostiolar area, ostiole, involucrellum: brown(ish) (if pale: fawn, tan; if mid: cinnamon) | brown(ish) black [ascm, if apoth] margin excipular photobionts: absent [ascm] paraphyses/-oids: absent asci: fissitunicate bitunicate [asc] tholus: thickened [asc] tholus amyloidity (iodine reaction): absent ascospores: (median) 8.0 [asp] shape: ellipsoidal [asp] length [µm]: (min) 12.0 (low) 19.0(median) 22.0 (high) 25.0 (max) 30.5 [asp] width [µm]: (min) 5.0 (low) 8.5(median) 9.6 (high) 10.5 (max) 13.0 [asp] septa: present [asp] septa: transversely septate [asp] transversal septa: (median) 1.0 [asp] pigmentation: hyaline, colourless [asp] perispore, epispore: not apparent 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. |