Fungalpedia – Note 2630, Rosellinula

 

Rosellinula R. Sant.

Citation when using this data: Meng QF et al. – Fungalpedia.

Index Fungorum, Faceoffungi, MycoBank, GenBank, Fig 1.

Classification: Dothideomycetes genera incertae sedis, Pezizomycotina, Ascomycota, Fungi.

Rosellinula was established by Eriksson et al. (1986b) to accommodate the type species R. haplospora, which was originally described as Endococcus haplospora Th. Fr. & Almq., growing on Lecanora cinerea (Eriksson et al. 1986b). The type species is characterized by globose, immersed, semi-exposed, black perithecia, 0.25–0.3 mm in diameter. with hymenial gelatin that initially turns blue with iodine, and then quickly changes to a wine-red color. The paraphyses are robust and gelatinously conglutinate, and the ascospores are ellipsoid, simple, blackish, and numerous within inflated-clavate asci (Fries 1867a). 

Santesson (1988) transferred Muellerella frustulosae Vouaux to Rosellinula frustulosae (Vouaux) R. Sant. Rogers et al. (1988) reclassified Roselliniella kalbi Hafellner as Rosellinula kalbi, and Galloway (2004) transferred Mullerella lopadii Vouaux to Rosellinula lopadii. To date, four species are recognized in this genus, all of which are lichenicolous on the crustose lichens. No available molecular data are currently available from NCBI, so the genus has been tentatively placed within Dothideomycetes genera incertae sedis by Hyde et al. (2024).

Type species: Rosellinula haplospora (Th. Fr. & Almq.) R. Sant.

Other accepted species: Species Fungorum – search Rosellinula

Figure 1 – Rosellinula haplospora redrawn from https://www.afllichenologie.fr/Photos_AFL/-Photos_AFL_R/Textes_R/Rosellinula_haplospora.htm. a Ascomata growing on the thallus of Lecanora sp. b Section of ascomata. c Asci. d Ascospores. Scale bars: b = 50 μm, c = 25 μm, d = 5 μm.

 

References

Eriksson OE, Hawksworth DL. 1986b – Outline of the Ascomycetes. Systema Ascomycetum 5, 185–324.

Fries TM. 1867a – Nya skandinaviska laf-arter. Botaniska Notiser, 105–110.

Galloway D. 2004 – New lichen taxa and names in the New Zealand mycobiota. New Zealand Journal of Botany 42 (1), 105–120.

Hyde KD, Noorabadi M, Thiyagaraja V, He M et al. 2024 – The 2024 Outline of Fungi and fungus-like taxa. mycosphere 15, 5146–6239.

Rogers R, Hafellner J. 1988 – Haematomma and Ophioparma: two superficially similar genera of lichenized fungi. Lichenologist 20 (2), 167–174.

Santesson R. 1988 – Fungi Lichenicoli Exsiccati. Fasc. 5–6 (nos 101–150). Thunbergia 6, 1–18.

 

Entry by

Meng QF, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai, 57100, Thailand and School of Public Health, Zunyi Medical University, Guizhou 563000, China.

 

Published online 23 June 2026

Back to Glossary Index Page