Fungalpedia – Note 2711, Illosporiopsis
Illosporiopsis D. Hawksw.
Citation when using this data: Meng QF et al. – Fungalpedia.
Index Fungorum, Faceoffungi, MycoBank, GenBank, Fig 1.
Classification: Hypocreales genera incertae sedis, Hypocreomycetidae, Sordariomycetes, Pezizomycotina, Ascomycota, Fungi.
Illosporiopsis was introduced by Sikaroodi et al. (2001) based on a phylogenetic analysis using SSU, ITS, and mtSSU sequences to accommodate the type species I. christiansenii, which was transferred from Hobsonia christiansenii B.L. Brady & D. Hawksw., found on the thalli of Candelariella and Physcia. This lichenicolous genus is characterized by sporodochial, vividly pink, erumpent colonies; micronematous conidiophores; monoblastic, integrated conidiogenous cells; and solitary, hyaline, coiled, twisted, helically septate, smooth conidia. In the phylogenetic analysis by Sikaroodi et al. (2001), I. christiansenii clusters within the Hypocrealean clade, alongside Illosporium and a species of Fusarium. Consequently, Illosporiopsis was tentatively placed within Hypocreales as genera incertae sedis, pending further phylogenetic studies.
Type species: Illosporiopsis christiansenii (B.L. Brady & D. Hawksw.) D. Hawksw., on Candelariella and Physcia (Sikaroodi et al. 2001).
Other accepted species: Species Fungorum – search Illosporiopsis.
= Hobsonia christiansenii B.L. Brady & D. Hawksw. (Lowen et al. 1986).
Figure 1 – Illosporiopsis christiansenii redrawn from Lowen et al. (1986). a Habit sketch. b Conidia. Scale bars: a = 100 μm, b = 10 μm.
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 16 July 2026