Thelidium
Family: Verrucariaceae
Thelidium image
Stephen Sharnoff
  • Greater Sonoran Desert
  • Resources
Nash, T.H., Ryan, B.D., Gries, C., Bungartz, F., (eds.) 2002. Lichen Flora of the Greater Sonoran Desert Region. Vol 1.
Life habit: lichenized Thallus: crustose, immersed or superficial, continuous or areolate, or nearly lacking, with or without a dark hypothallus upper surface: pale grayish to blackish brown photobiont: primary one a chlorococcoid alga, secondary photobiont absent Ascomata: perithecial, immersed in thallus or in pits in limestone, or prominent to superficial, subglobose to pyriform involucrellum: present or absent; exciple: pale or dark, formed of tangentially compressed cells; periphyses: simple to branched; interascal filaments absent; hymenial gel I+ orange-red, KI+ blue asci: clavate, wall apically thickened, often with a small ocular chamber, non-amyloid, 8-spored ascospores: biseriate, 1- to 3-septate, occasionally up to 5-septate or with 1-2 longitudinal septa, ellipsoidal to oblong-ellipsoid or ovate, colorless, smooth, non-halonate Conidiomata: not observed Secondary metabolites: none detected Geography: world-wide, mainly temperate Substrate: usually on rock (mostly limestone), rarely on other substrates, never maritime. Notes: The genus is closely related to Verrucaria and Polyblastia and only separated by ascospore septation. The spores in Thelidium are mainly 2-celled.
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Thelidium absconditum
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Thelidium abstractum
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Thelidium acrotelloides
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Thelidium aeneovinosum
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Thelidium aeniovinosum
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Thelidium aerimontanum
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Thelidium algovicum
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Thelidium alpinum
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Thelidium amethystinum
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Thelidium amylaceum
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Thelidium anisomerum
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Thelidium anisosporum
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Thelidium antonellianum
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Thelidium aphanes
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Thelidium aquaticum
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Thelidium ardesiacum
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Thelidium areolatum
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Thelidium argilospilum
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Thelidium arnoldianum
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Thelidium arnoldii
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Thelidium asperatum
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Thelidium athallinum
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Thelidium aurantii
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Thelidium auruntii
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Thelidium austriacum
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Thelidium austroatlanticum
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Thelidium bavaricum
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Thelidium bermudanum
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Thelidium brachysporum
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Thelidium brasiliense
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Thelidium bryospilum
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Thelidium bubulcae
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Thelidium bucegiense
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Thelidium bukovicae
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Thelidium calcareum
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Thelidium calcivorum
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Thelidium caloplacae
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Thelidium cataractarum
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Thelidium cinerascens
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Thelidium cinerosum
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Thelidium circumspersellum
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Thelidium circumvallatum
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Thelidium coerulescens
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Thelidium coeruleum
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Thelidium congregabile
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Thelidium congregatum
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Thelidium corconticum
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Thelidium corticola
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Thelidium crassum
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Thelidium creticum
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