Kathistes – Facesoffungi number: FoF 01290

Kathistes Malloch & M. Blackw., Can. J. Bot. 68(8): 1712 (1990)

MycoBank number: MB 25513; Index Fungorum number: IF 25513; Facesoffungi number: FoF 01290; 3 morphological species (Species Fungorum 2020), 2 species with sequence data.

Type species – Kathistes calyculata Malloch & M. Blackw.

Notes – Kathistes was introduced as the type genus in Kathistaceae by Malloch & Blackwell (1990), which was originally described with three species (K. analemmoides, K. calyculata, K. fimbriata). The genus is characterized by long-necked, brown to dark ascomata, transparent at the base, and germinating ascospores produced by budding yeast-like cells (Malloch & Blackwell 1990).

Figure 139 – Kathistes spp. (a-i: Kathistes calyculata, j, k: K. fimbriata, l-r: K. analemmoides, redrawn from Malloch & Blackwell 1990). a Ascoma with dark neck and hyaline base. b Asci. c Ascospores. d Ascospores after 4 h on agar Germ tubes have developed by this time. e-g Ascospores after 19, 27, and 42 h on agar, respectively. Yeast cells have begun to develop. h Yeast cells after several days. i Sporidioma showing single-celled wall at base and sporidiolae filling hollow darkened neck cell. j Ascoma with dark neck and hyaline base. k Three ascospores illustrating differences in septation, size, and pigmentation. l Ascomata. m Asci. n Ascospores from an extruded spore mass. One ascospore has begun producing yeast cells. o-q Three ascospores, each drawn at 2, 3, 4, and 18 h after being placed on agar r Sporidioma showing single wall layer of base and darkened hollow neck cell.

Species