Monographs Details: Cyclodictyon
Authority: Sharp, Aaron J., et al. 1994. The Moss Flora of Mexico. Part Two: Orthotrichales to Polytrichales. Mem. New York Bot. Gard. 69 (2)
Description:Genus Description - Plants soft and delicate, slender to medium-sized, in shiny, sometimes iridescent, whitish-green, dark-green, reddish, or brownish flat mats. Stems creeping, sparsely radiculose, irregularly pinnate-branched. Leaves inserted in 5-8 rows, complanate, often shriveled and ± crisped when dry, asymmetric, broadly oblong-ovate and abruptly narrowed to a short or fairly long acumen, rarely ovate-lanceolate and gradually acuminate; margins entire or serrulate near the apex; costae 2, divergent, ending above the leaf middle; cells lax and thin-walled, transparent, smooth, hexagonal or oblong-hexagonal, linear in 1 -several rows at the margins forming a hyahne border, oblong or rhomboidal at base. Perichaetial leaves small, ovate or lanceolate, short- to fairly long-acuminate. Setae elongate, dark-red, smooth; capsules inclined to horizontal, oblong-cylindric with a short neck, smooth; annulus narrow; operculum straight and long-rostrate from a conic base; exothecial cells not collenchymatous; exostome teeth dark-red or red-brown, lance-subulate, broadly furrowed, cross-striolate below, papillose above, bordered, trabeculate; endostome yellow-brown, finely papillose, the basal membrane high, the segments lanceolate, keeled, perforate, about as long as the teeth, and cilia none. Calyptrae scarcely longer than the opercula, smooth, naked.
Buck (1987a) referred the aquatic Lepidopilum subtortifoliumBartr. (described from Guatemala) to the genus Cyclodictyon, as C. subtortifolium (Bartr.) Buck.