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Peltigera occidentalis (Å.E. Dahl) Kristinsson  
Family: Peltigeraceae
Peltigera occidentalis image
  • LIAS
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Botanische Staatssammlung Munchen

Global occurrence: Eurasia – Europe | Americas – North America (incl Mexico).  Substrate: soil, clay, humus, turf, detritus, dead leaves | bryophytes – mosses, liverworts.  Life habit: lichenized (mutualistic with algal photobionts).  Thallus: foliose (foliaceous), leaf-like; [th] upper surface: grey(ish) | green(ish) | brown(ish) (if pale: fawn, tan; if mid: cinnamon) | grey(ish) brown | yellow(ish) brown; [th upper surface]: pruinose; [th upper surface] pruina: scarce, sparse, fine; [th marginal and upper surface] specific structures: present; [th margin] cilia, cilioid structures: absent; [th upper surface] isidia, isidioid structures: present; [th upper surface] soredia, soralia, soralioid structures: absent; [th] morphol substructures (eg areoles, lobes, branches) width [mm]: (low) 10.0 (high) 20.0; [th] morphol substructures (eg areoles, squamules): distantly discontiguous; [th] morphol substructures (eg areoles, lobes, branches) upper surface: smooth, plane | cracked, fissured, fractured, rimulose, subrimose | hairy, pilose, setose, hirsute, tomentose, pubescent, felt-like; [th] morphol substructures (eg lobes, branches): irregular; [th] lower surface: brown(ish) (if pale: fawn, tan; if mid: cinnamon) | white(ish); [th lower surface] specific structures: present; [th lower surface] rhizines, rhizoid structures: present; [th lower surface] rhizines, rhizinoid structures: unbranched, simple | fasciculate.  Ascomata: absent | present; ascoma: apothecial, apothecioid – hymenial; ascoma [mm]: (low) 4.0 (high) 10.0; ascoma: sessile, superficial; [ascm, if apoth] disc, mazaedium: concave | plane, flat, flattened, expanded; [ascm, if apoth] disc, mazaedium: brown(ish) (if pale: fawn, tan; if mid: cinnamon); [ascm, if apoth] disc, mazaedium: epruinose; [ascm, if apoth] margin excipular photobionts: present | sparse; [ascm, if apoth] subhymenial layers, hypothecium; [if perith] basal excipulum: brown(ish) (if pale: fawn, tan; if mid: cinnamon); [ascm] paraphyses/-oids: present; [ascm] epihymenium, epithecium: brown(ish) (if pale: fawn, tan; if mid: cinnamon).  Asci: lecanoralean; [asc] tholus: thickened; [asc] tholus amyloidity (iodine reaction): present; [asc] tholus amyloidity pattern: with amyloid tube, ring (= Collema-, Micarea-, Porpidia-, Psora-types etc).  Ascospores: (median) 8.0; [asp] shape: acicular (needle-shaped); [asp] length [µm]: (low) 50.0 (high) 73.0; [asp] width [µm]: (low) 2.6 (high) 5.0; [asp] septa: present, transversely septate; [asp] transversal septa: (median) 3.0; [asp] pigmentation: hyaline, colourless; [asp] perispore, epispore: not apparent.  Secondary metabolites: present, 15α-acetoxyhopane-22-ol (dolichorrhizin) | 7ß-acetoxyhopane-22-ol (peltidactylin) | gyrophoric acid | methyl gyrophorate | tenuiorin | zeorin (hopane-6α,22-diol) | unknown/unidentified (tri-)terpenoid(s), (tri-)terpene(s).  Primary photobiont: present, cyanobacterial.  Secondary photobionts (eg in cephalodia): absent.

Peltigera occidentalis
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Peltigera occidentalis image
Peltigera occidentalis image
Peltigera occidentalis image
Peltigera occidentalis image
Peltigera occidentalis image
Peltigera occidentalis image
Peltigera occidentalis image
Peltigera occidentalis image
Peltigera occidentalis image
Peltigera occidentalis image
Peltigera occidentalis image
Peltigera occidentalis image
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This project made possible by National Science Foundation Awards: #1115116, #2001500, #2001394
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