Psoroma femsjonense (Fr.) Trevis., a misunderstood species possibly extinct from Europe
- Author:
- Elvebakk A.
- Year:
- 2022
- Journal:
- Graphis Scripta
- Pages:
- 34(2): 22–35
- Url:
- https://nhm2.uio.no/botanisk/lav/Graphis/34_2/GS_34_22.pdf
Psoroma femsjonense, long considered to be a synonym of P. hypnorum, is shown here to represent a distinct,
misunderstood species. The collections seen are from the lowlands of southern Sweden, Denmark, Germany,
the Czech Republic, and France. In these areas, the species has not been collected since 1945 and may prove to
be regionally extinct from these countries. However, a report indicates that the species has recently been
collected in high-altitude steppes in Anatolia of NE Turkey. Psoroma femsjonense is most similar to P. tenue
var. tenue, known from Antarctica and adjacent areas of the Southern Hemisphere, and obviously has different
climatic demands, in addition to having different apothecium margins and paraphyses. In Europe, P.
femsjonense can be distinguished from P. hypnorum by the chestnut-brown thallus, crenulate (but not
squamulose) apothecium margins, low perispore verrucae, and the presence of porphyrilic acid methyl ester
and pannaric acid in the thallus. Psoroma tenue var. boreale differs from P. femsjonense by the distinct
cinnamon-brown colour, strongly glossy thallus, and a predominantly alpine and arctic distribution.
- Id:
- 34145
- Submitter:
- zdenek
- Post_time:
- Wednesday, 09 February 2022 23:57