Monographs Details: Trematodon
Authority: Sharp, Aaron J., et al. 1994. The Moss Flora of Mexico. Part One: Sphagnales to Bryales. Mem. New York Bot. Gard. 69 (1)
Family:Bruchiaceae
Scientific Name:Trematodon
Description:Species Description - Plants small, gregarious to loosely tufted, light-green or yellowish. Leaves ± contorted when dry, oblong-ovate and clasping at base, gradually to abruptly narrowed to a lanceolate or subulate point; costa subpercurrent to excurrent; cells small, obscure, smooth, subquadrate to short-rectangular, longer at the base, not differentiated at basal angles. Setae elongate, straight or flexuose, yellow; capsules erect or curved, cylindric with a narrow neck as long as the urn or longer, often strumose at base; annulus simple or compound; operculum slenderly and obliquely long-rostrate; peristome lacking or single, with 16 undivided, perforate, or forked teeth, vertically barred-striate on the outer surface. Spores ± polygonal or reniform. Calyptrae cucullate, moderately inflated, smooth, naked.

Discussion:

The elongate seta, long, slender neck of the capsule, cylindric urn, differentiated operculum, and cucullate calyptra are distinctive. The peristome (when present) has vertically barred teeth.