NAME Trichothyrites
AGE    AGE span:  mya
K&J CLASSIFICATION (2000) Ascomycetes, Microthyriales.
FIGURE(S)
FIGURE REFERENCE
SPECIES, AUTHORITY Trichothyrites Rosendahl 1943, p. 137.
LOCATION
ORIG DESCRIPTION* ORIGINAL DIAGNOSIS: [combined description] Mycelium consisting of yellowish or brownish, branching, septate hyphae with occasional anastomoses, 5-6.7 µm in diameter, individual cells (20) 28-33 (41) µm long, perithecia dark brown to nearly black, circular or nearly so, disk-shaped or, because of slightly upturned margin, shallow saucer-shaped, 70-95 µm in diameter, complete, with upper and lower membranes composed of radially arranged cells, upper membrane with a central papilla having a distinct pore or ostiole, marginal cells of membrane 4-5 µm wide, 6-8 µm long, cells of papilla more nearly quadrangular and thick-walled, several of the marginal cells of pore prolonged into finger-like processes, cells of lower membrane all thin-walled and radiating from a circular central cell, asci and spores lacking.

EMENDED DIAGNOSIS (Smith 1980, p. 209): Thyriothecia appearing disc- or saucer-shaped due to compression; possessing definite upper and lower walls of radiate rows of almost square cells (3-8 x 3-8 µm). Cell walls of upper layer of thyriothecium generally more strongly thickened than those of the lower layer. Thyriothecia ranging from 70 µm to 200 µm in diameter, and bearing on upper wall an erect ostiolar collar (papilla) made up of 2-6 tiers of small (2 x 2 µm) extremely thick-walled quadrilateral cells. Upper most tier (ostiolar margin) of cells may have short prolongations (setae) in some cases. Thyriothecial outline usually smooth, but may appear lobate.
COMMENTS* (Rosendahl): As for the type species.
PUBLICATION REFERENCE Rosendahl CO. 1943. Some fossil fungi from Minnesota; Bulletin of the Torrey Botanical Club, v. 70, p. 126-138.

Smith PH. 1980. Trichothyriaceous fungi from the Early Tertiary of southern England; Palaeontology, v. 23, p. 205-212.
K&J REMARKS As for the type species.
TYPE TYPE: Trichothyrites pleistocaenicus Rosendahl 1943, p. 137, figs. 10-11 [lectotype, designated by Jansonius & Hills (1977), card no. 3424].
ALL NAMES (Including synonyms) Notothyrites Cookson 1947a, p. 208.
Sphaerialites Venkatachala & Kar 1969, p. 181.; Trichothyrites;
SERIAL NUMBER 1729
PUBLIC COMMENTS
 *For source, see Publication Reference.