Ferdinand Theissen

Ferdinand Theissen (27 July 1877 in Krefeld – 5 September 1919) was a German-Austrian Jesuit priest and mycologist.

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Ferdinand Theissen

He studied theology at the seminary in Feldkirch,[1] then from 1902 to 1908 was stationed in São Leopoldo, Brazil. Following his return to Europe he continued his studies in Valkenburg and Innsbruck, and in 1914 returned to Feldkirch as a schoolteacher. He died in September 1919 as a result of a climbing accident during a collection excursion in the Vorarlberg Alps.[2]

He was the author or co-author of numerous mycological taxa; with Hans Sydow he co-described the families Botryosphaeriaceae, Dothioraceae, Phyllachoraceae and Polystomellaceae.[3][4][5][6] The genus Theissenia was named after him by André Maublanc (1914).[7]

Selected writings
  • Fragmenta brasilica (5 parts, 1908–12) in Annales Mycologici.
  • Die Hypocreaceen von Rio Grande do Sul, Südbrasilien (1911) in Annales Mycologici – Hypocreaceae of Rio Grande do Sul, southern Brazil.
  • Decades Fungorum Brasiliensium, (1911). It is an exsiccata-like work.
  • Le genre Asterinella (1912) – The genus Asterinella.
  • Zur Revision der Gattungen Microthyrium und Seynesia (1912–13) in Österreichische Botanische Zeitschrift – Revision of the genera Microthyrium and Seynesia.
  • Lembosia-Studien (1913) – Lembosia studies.
  • Dothideazeen-Studien (2 parts, 1914; with Hans Sydow) in Annales Mycologici – Dothideaceae studies.
  • Die Dothideales. Kritisch-systematisch Originaluntersuchungen (1915; with Hans Sydow) in Annales Mycologici – The Dothideales.
  • Studie über Botryosphaeria (1916) in Annales Mycologici – Studies of the genus Botryosphaeria.
  • Die Gattung Parodiella, (1917) in Annales Mycologici – The genus Parodiella.[8]

References and notes
  1. Ferdinand Theissen (1877-1919) The Mushroom Journal
  2. Ainsworth & Bisby's Dictionary of the Fungi by Geoffrey Clough Ainsworth
  3. Taxon author: Theiss. & H. Syd., 1915 ITIS
  4. Taxon author: Theiss. & H. Syd., 1917 ITIS
  5. Taxon author: Theiss. & H. Syd., 1918 ITIS
  6. *Note: Some sources list Paul Sydow, the father of Hans, as the co-authority; e.g. MycoBank.
  7. Theissenia Index Fungorum
  8. Cybertruffle (List of scientific papers)
  9. International Plant Names Index.  Theiss.
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