Trematodon nitidulus W. P. Schimper ex Bescherelle 1872

Trematodon nitidulusschimp.; Besch. Mem. Soc. Sci. Nat Cherbourg 16: 161. 1872.
Plants 7-8 mm. high; stems simple, erect, 2-3 mm. high: leaves crowded, twisted and recurved when dry, 1-2 mm. long; base of clear lax cells, the upper cells with thick walls; costa stout, ending in the subulate, serrulate point; margins revolute; perichaetial leaves mmierous, crowded at the apex. Autoicous : antheridia in small basal buds : seta straight or arcuate, 3-4 mm. long, pale-yellow: calyptra covering only the beak, lobed: capsule glossybrown, sulcate when dry, 2-2.5 mm. long; lid rostrate, equaling the urn and neck; peristome none ; mouth bordered by 2-3 rows of orange-red cells, forming a persistent tessellated rim or pseud-annulus: spores rough, warty, 21-27 ^ in diameter, maturing in September.
Type locality: In a narrow ditch, Rio Blanco, Orizaba, Vera Cruz.
Distribution: Vera Cruz.