Monographs Details: Thysananthus
Authority: Thiers, Barbara M. & Gradstein, S. Robbert. 1989. Lejeuneaceae (Hepaticae) of Australia. I. Subfamily Ptychanthoideae. Mem. New York Bot. Gard. 52: 79 p.
Scientific Name:Thysananthus
Description:Genus Description - Branching Lejeunea-type. Ventral epidermal cells not larger than medullary cells; ventral merophyte 4-12 cells wide. Leaves convoluted when dry; leaf cells elongate; trigones cordate (subgenus Thysananthus) or radiate (subgenus Sandeanthus); oil bodies segmented; ocelli absent; gemmae absent. Gynoecial innovations present, innovation leaf sequence lejeuneoid; perianths with one ventral keel. Androecial bracts epistatic or hypostatic. Seta articulated; capsule thickenings of the fenestrate type; sporeling of the Lopholejeunea-type. This genus, which is in need of revision on a world-wide basis, currently contains about ten species: four in tropical America (Fulford, 1941), one in Africa (Vanden Berghen, 1950), and 5-6 in tropical Asia (Gradstein, 1985a).

Discussion:Type. T. comosus Lindenb.