Enigmotrema

Single-species lichen genus

Enigmotrema is a fungal genus in the family Graphidaceae. It contains only one known species, Enigmotrema rubrum, a lichen which was discovered in Costa Rica. Both the genus and species were first described in 2012 by the lichenologist Robert Lücking. The genus name combines the Greek words for "mystery" and "hole", referring to the unusual appearance of its reproductive structures. Enigmotrema is characterised by its olive-coloured body (thallus) and distinctive dark red fruiting bodies (apothecia) that undergo a unique opening process as they mature. The genus is closely related to Cruentotrema but differs in its genetic makeup and the development of its fruiting bodies. Currently, Enigmotrema is only known from a single location in a montane rainforest in Costa Rica, where it was found growing on tree bark.

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