A new species of Clandestinotrema (Ascomycota: Ostropales: Graphidaceae) from montane cloud forest in the Venezuelan Andes
 
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Department of Biology, Duke University, Campus Box 90338, Durham, NC 27708, USA
Publication date: 2018-07-25
 
Plant and Fungal Systematics 2018; 63(1): 7–10
 
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ABSTRACT
Revision of lichen herbarium specimens at DUKE revealed a species of thelotremoid Graphidaceae new to science. Clandestinotrema carbonera sp. nov. is characterized by an olive-green thallus, dense cortex, the absence of a columella, ascospores 15–24 × 5.5–8.0 μm with 3–5 transverse septa (occasionally submuriform), and the presence of hypostictic acid as a major substance. At present the species is known only from the type locality, an area of montane cloud forest near Mérida, Venezuela. Interestingly, this species appears to have been discussed in the literature once before, as an unnamed ‘Thelotrema sp.’ which in the 1970s provided the first instance of hypostictic acid isolated from a lichen. The previous report of C. leucomelaenum from the same locality is shown to actually represent C. pauperius.
 
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