Naetrocymbe laburni (Leight. ex Arnold) ined.

provisionally placed here, ICN Art. 36.1b. Basionym: Arthopyrenia laburni Leight. ex Arnold - Flora (Regensburg), 44: 537, 1861
Synonyms:
Distribution: N - Emil (Fariselli & al. 2020)
Description: Thallus crustose, inconspicuous, dark brown to black, non-lichenized. Perithecia black, somehow shiny, more or less circular in outline, scattered or clustered, 0.2-0.25 mm across. Involucrellum dimidiate, brown both in water and in K, of compacted hyphae and bark cells; exciple thin, usually colourless, surrounding the centrum; pseudoparaphyses thin, rather short-celled and richly branched and anastomosing; downwardly projecting periphysoids present near the ostiole. Asci 8-spored, obpyriform, fissitunicate, with two functional wall layers, 36-48 x 18-21 μm. Ascospores 1-septate, hyaline (sometimes yellowish brown and 3-septate when overmature), slightly constricted at septum, the cells often biguttulate, but without median constrictions, (14-)18-22(-23) x (3-)5-6 μm, with a usually distinct c. 1 μm thick (in K) perispore. Photobiont absent. Spot tests: all negative. Chemistry: without lichen substances.
Note: a probably non-lichenised species resembling N. fumago in the thallus indicated by dark patches, but the 1-septate ascospores virtually narrower due to their length (18-22 × 3-4 µm); on smooth bark, especially of Laburnum.
Growth form: Fungus
Substrata: bark
Reproductive strategy: mainly sexual

pH of the substrata:

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Eutrophication:

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Poleotolerance:

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Altitudinal distribution:

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Predictive model
Herbarium samples


P.L. Nimis CC BY-SA 4.0
TSB 3063



P.L. Nimis CC BY-SA 4.0
TSB 3063


Photo uploaded by P. Cannon - CC BY-SA NC - Source: http://fungi.myspecies.info/all-fungi/naetrocymbe-laburni