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 Calicioids of Temperate Regions
0.01 (development)
Eric B. Peterson
 

Thelomma

Taxa covered (5):

Key to Species

Validation script believes all taxa are included in the key(s).


  1. 1a. Ascomata rare. Grayish thallus areoles bursting with dark isidioid soredia (typically referred to as isidia in the literature).Thelomma ocellatum
  2. 1b. Ascomata common. Isidioid soredia not present.
    1. 2a. Spores non-septate.
      1. 3a. Thallus with a yellow to olivaceous tinge, KC-.Thelomma santessonii
      2. 3b. Thallus grayish, KC+ rose red.
        1. 4a. Spores with a very coarse ornamentation, fertile verrucae irregular in shape.Thelomma siliceum
        2. 4b. Spores with a less coarse and irregular ornamentation, fertile verrucae smooth and regular in shape.Thelomma mammosum
    2. 2b. Spores septate.
      1. 5a. Thallus placodiform (forming marginal lobes). KC+ rose red.Thelomma californicum
      2. 5b. Thallus rimose, areolate, verrucose, or other non-lobate forms. KC-.
        1. 6a. Mature spores 22-28μm long. Thallus thick, verrucose, PD-.Thelomma occidentale
        2. 6b. Mature spores 13-17μm long.
          1. 7a. Thallus PD red; epiphytic; known from southeastern North America.Thelomma carolinianum
          2. 7b. Thallus PD-, typically thallus is quite brown; saxicolous; known from coastal southern California.Thelomma brunneum

Species Details

Thelomma brunneum (W.A. Weber) M. Prieto and Wedin
ID=214
Type(s): In Weber (1967).
Synonyms:
Habit and Morphology: Verrucose to areolate. 1-3 ascomata per areole, 0.5 - 0.7 mm diameter.
Anatomy: Spores septate, 11 - 16 um, with a bumpy ornamentation.
Chemistry: K+ reddish brown (norstictic acid).
Habitat: On rock.
Biogeography:
Global Rank:
Conservation:
Notes:
External Information: References: Weber 1967.
Thelomma californicum (Tuck.) Tibell
ID=201
Type(s):
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External Information: References: .
Thelomma carolinianum (Tuck.) Tibell
ID=202
Type(s):
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External Information: References: .
Thelomma mammosum (Hepp) A. Massal.
ID=203
Type(s):
Synonyms:
Unspecified collections:
Thelomma mammosum
Thelomma mammosum

Habit and Morphology:
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Chemistry:
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External Information: References: .
Thelomma siliceum (Fee) Tibell
ID=207
Type(s):
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Habit and Morphology:
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Chemistry:
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External Information: References: .
Count of taxa = 5
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