Monographs Details: Parathelium microcarpum Riddle
Authority: Britton, Nathaniel L. & Millspaugh, Charles F. 1920. The Bahama Flora.
Family:Pyrenulaceae
Description:Species Description - Thallus crustaceus uniformis effusus hand limitatus, cum cortice maculam nitidain ochraceo-fulvam eonstitueiis, continuus laevigatus. Gouidia chroolepoidea. Perithelia pyriformia, minuta ad 0.5 mm. longa, 0.3 mm. lata, integra nigra semi-innata parte emersa nudata. ostiolis lateralibus collis breviusculis. Paraphyses sparse ramosae. Asci 8-spori. Sporae fuscae ellipsoideae, ad apices acutae, 3-septatae, ad septa modice constrictae, loeulis lentiformibus, 18-22 X 8-9 m.

Discussion:

On bark in coppice, West End, Great Bahama (Brace, April 16-May 8, 1905, S615, type). Parathelium microcarpum has smaller spores than any other species of the genus, with the exception of P. decumbens Muell. Arg. (Hedwigia 32: 134. 1803) which differs from the present species in the whitish thallus and the larger perithecia.

Distribution:Grand Bahama Bahamas South America|