Thysanothecium
Type : Thysanothecium hookeri Mont. & Berkeley
Description : Flora (1985: 579).
Key
1
Primary squamules often ascending, imbricate, 0.05–0.5(–1) mm diam.; cortex of pseudopodetia fissured, exposing corticate granules; containing divaricartic and usnic acids; on charred wood, rarely on decorticated wood
Primary squamules scattered, convex, 0.5–2.0 mm diam.; cortex of podetia continuous, not exposing corticate granules; containing barbatic, 4- O -demethylbarbatic and usnic acids; on clay-cemented sand
Thysanothecium is a genus of two species (Kirk et al. 2001), included in the family Cladoniaceae (Stenroos et al. 2002c; Eriksson et al. 2004; Pennycook & Galloway 2003). It was originally described from Australia and thought to be endemic there (Galloway 1977b), but it is now known to be more widely distributed in the Pacific (Galloway & Bartlett 1983; Stenroos 1988b; Sammy 1992; Hammer 2001b). Podetial morphogenesis in the genus is discussed in Hammer (2001b). Both species occur in New Zealand. Thysanothecium buchanani C.Knight (Knight 1881) is referable to Psoroma buchanani (C.Knight) Nyl.
