Английская Википедия:Compositrema borinquense
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Compositrema borinquense is a species of corticolous (bark-dwelling) crustose lichen in the family Graphidaceae.[1] It is found in northeastern Puerto Rico, where it grows on the trunks of trees in the palo Colorado forest of El Yunque National Forest. This lichen differs from others in the genus Compositrema, most notably from its closest relative, C. thailandicum, due to its distinctive, irregularly radiating Шаблон:Lichengloss–a central shaft of fungal hyphae in the ascoma.
Taxonomy
Compositrema borinquense was first formally described and named in 2014 by lichenologists Joel Mercado-Díaz, Robert Lücking, and Sittiporn Parnmen. The type specimen was found in the municipality of Canóvanas, in the Barrio Cubuy area or Puerto Rico. The specimen was found on the trunk of an unidentified tree.[2]
The genus Compositrema is known for its compound ascomata with a brain-like appearance. This new species, C. borinquense, exhibits a close morphological resemblance to genus Stegobolus, although they are not closely related. Without molecular data, it could easily be mistaken for a species of Stegobolus due to its complex columella. This unique feature distinguishes it from all known species in the two genera. The species that bears the most resemblance to C. borinquense is Stegobolus radians, but even then, the columella strands in the latter are much thinner, white, and regularly Шаблон:Lichengloss, compared to the thicker, irregularly arranged strands in C. borinquense.[2]
Description
The thallus of the Compositrema borinquense, or the vegetative tissue of the lichen, corticolous, meaning it grows on the bark of trees, and can reach a diameter of up to Шаблон:Convert. It is light grey-green, shiny, and has a smooth to uneven surface. The thallus lacks crystal clusters and is 80–100 μm thick, with a dense Шаблон:Lichengloss and a thick Шаблон:Lichengloss comprising cells of Trentpohlia, a type of green alga.[2]
The ascomata, or fruiting bodies of the lichen, are rounded to irregular in shape, prominent to broadly Шаблон:Lichengloss, with a lateral Шаблон:Lichengloss, and a diameter of 0.7–1.5 mm. The Шаблон:Lichengloss of the ascomata is filled with a distinct columella composed of numerous, irregularly arranged, cream-white strands. This distinct feature sets Compositrema borinquense apart from its closest relative, Compositrema thailandicum, which lacks such a columella.[2]
Habitat and distribution
Compositrema borinquense is found in the understory of the palo Colorado forest in El Yunque National Forest, Puerto Rico. It grows on the living trunks of unidentified trees in the shaded areas of the forest. The distribution of the species is limited to this region.[2]
References
- Английская Википедия
- Graphidaceae
- Lichen species
- Lichens described in 2014
- Lichens of the Caribbean
- Taxa named by Robert Lücking
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