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Carbacanthographis tetrinspersa
Species of lichen From Wikipedia, the free encyclopedia
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Carbacanthographis tetrinspersa is a species of corticolous (bark-dwelling) script lichen in the family Graphidaceae.[1] Found in the primary rainforests of Mato Grosso, Brazil, C. tetrinspersa is named for its characteristic ascospores and inspersed hymenium.
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Taxonomy
Described by the Dutch lichenologist André Aptroot in 2022, Carbacanthographis tetrinspersa is characterized by its distinctive lirellae (a type of fruiting body) with a pruinose (frosty appearance) disc and labia top, and its clavate (club-shaped) 3-septate (divided into three sections) ascospores. The species name tetrinspersa refers to the four-loculate (four-chambered) ascospores and the inspersed hymenium (the tissue layer containing the spore-producing asci).[2]
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Description
The thallus of Carbacanthographis tetrinspersa is crustose (forming a crust-like layer) and continuous, closely adhering to the surface of the bark on which it grows. It has a dull, dirty white appearance and can cover areas up to 15 cm (5.9 in) in diameter, with a thickness of up to 0.1 mm. The photobiont (the algal partner in the lichen symbiosis) is trentepohlioid, a type of green algae.[2]
Ascomata (spore-producing structures) are erumpent (breaking through the thallus surface), solitary, and superficial, with linear, wavy, and often branched lirellae. The excipulum (the outer layer of the ascomata) is completely carbonised.[2]
Chemically, the thallus tests negative in UV light, C, K, KC, and P spot test reactions but shows a positive reaction for K (turning yellow). Thin-layer chromatography reveals the presence of stictic acid, a compound relatively rare in the Graphidaceae but known in genus Carbacanthographis.[2]
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Habitat and distribution
This lichen grows on tree bark in primary rainforests, with its known distribution limited to its type locality in Brazil.[2]
References
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