Thalassogena
sphaerica
Kohlm. & Volkm.-Kohlm.
Sordariomycetes, Subclass Hypocreomycetidae
Microascales
Halosphaeriaceae
Ascomata: 150-260 μm diam., subglobose, cream-coloured, coriaceous, superficial or immersed, solitary, ostiolate, papillate.
Necks: 230-570 μm long, 50-85 μm diam., periphysate.
Peridium: 10-16 μm thick, composed of 4-5 layers of elongated cells with large lumina, especially the inner few layers of cells.
Catenophyses: present.
Asci: 72-89 × 22-27 μm, thin-walled, unitunicate, eight-spored, clavate, persistent, flattened at the apex and with a pore, pedicellate.
Ascospores: 13-(15)-17 μm, hyaline, subglobose, rarely ellipsoidal, one-celled, lacking appendages.
Culture: -
Anamorph: undetermined.
Key references:
Kohlmeyer J, Volkmann-Kohlmeyer B (1987). Thalassogena, a new ascomycete genus in the Halosphaeriaceae. Systema Ascomycetum. 6:223-228.
Image: Thalassogena sphaerica. (a) Section of immersed, globose ascoma. (b) One-layered
peridium of elongated cells with large lumina, especially the inner few layers. (c) Clavate, thinwalled
ascus with a flattened apex. (d) Globose to subglobose ascospores. Scale bar: a=50 μm;
b, c, d=10 μm. Photo reproduced with the permission of the National Taiwan Ocean University.