Monographs Details: Porina subfirmula Riddle
Authority: Britton, Nathaniel L. & Millspaugh, Charles F. 1920. The Bahama Flora.
Family:Porinaceae
Scientific Name:Porina subfirmula Riddle
Description:Species Description - Thallus epilithicus determinatus subfoliosus effiguratus, irregulariter rotundatus, margine integro aut crenato haud lobato, planus, arete adnatus, crassus (crassitudine 0.15-0.2 mm.), atro-olivaceus, continuus laevigatus vel sat inaequalis nitidulus; superne corticatus cortice tenue (crassitudine 12-14 µ ) pseudo-parenchymatica, inferne ecorticatus. Gonidia chroolepoidea. Perithecia subglobosa circ. 0.3 mm. lata, tota immersa aut apicibus leviter emergentibus et sat denudatis, amphithecio superne nigro inferne decolore. Paraphyses persistentes simplices. Asci 8-spori. Sporae incolores fusiformes, haud bene evolutae, 6-8-loculares, loculis cylindricis, circ. 25 X 4 µ.

Discussion:

On limestone. Sierra de las Casas, Isle of Pines, Cuba (Britton and Wilson, March 22, 1916, 157U, type). Bahamas: on limestone, New Providence (Brace, 9)87). This species belongs to the section Segestria, and is evidently related to but quite distinct from the preceding species. Both species are decidedly Endocarpon like in appearance.

Distribution:Cuba South America| Grand Bahama Bahamas South America| New Providence Bahamas South America|