Monographs Details: Ionaspis tropica Riddle
Authority: Britton, Nathaniel L. & Millspaugh, Charles F. 1920. The Bahama Flora.
Family:Hymeneliaceae
Scientific Name:Ionaspis tropica Riddle
Description:Species Description - Thallus crustaceus effusus tenuissimus cum saxo conferruminatus, fuscescens, minutissime farinosus, circa apothecia rimuloso-areolatus. Gonidia pauca chroolepoidea. Apothecia caespitosa minuta, in areolis thallinis immersa, disco primum punctiforme dein aperto ad 0.3 mm. lato, concavo aut piano, eastaneo aut fuscescente, margine pallidiore integro tenue parum prominente persistente; epithecio fulvo, excipulo et hypothecio pallido. Asci clavati 8-spori. Sporae incolores simplices ellipsoideae membrano tenue, 10-12 X 6 -7 µ.

Discussion:

On limestone, New Providence (Brace, November 20, 1918, 0G97, type). This species has the general appearance of Ionat nuacculcns (Ach.) Arnold, but differs in the brown thallus and disk of the apothecium.