Abstract
Summary Roccella hereroensis Vain. (Namibia) was found to contain the depsidones psoromic acid (main compound) and consoporomic acid as well as stictic acid and cryptostictic acid, whilst Roccella mossamedana Vain. (Angola) proved to produce the depsidones norstictic acid (main compound) and connorstictic acid besides psoromic acid. Santessonia sorediata Ssr. et Wess. (Namibia) belongs to the same chemosyndrome (main compound psoromic acid, accessory compounds consporomic acid, stictic acid, cryptostictic acid, norstictic acid). All but norstictic acid from Roccella mossamedana Vain. and psoromic acid from Santessonia sorediata Ser. et Wess. are first records for the corresponding taxa. In view of their close chemical, morphological, chorological, and ecological relationships, the three entities can be united under Santessonia hereroensis (Vain.) Follm. comb. nov. (Ascolichenes, Lecanorales, Physciaceae: has. Roccella hereroensis Vain., syn. Roccella mossamedana Vain., Santessonia sorediata Ser. et Wess., Usnea hereroensis [Vain.] Darb., Usnea mossamedana [Vain.] Darb.).
Published Version
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