Varicellaria hemisphaerica
| Varicellaria hemisphaerica | |
|---|---|
| |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Lecanoromycetes |
| Order: | Pertusariales |
| Family: | Varicellariaceae |
| Genus: | Varicellaria |
| Species: | V. hemisphaerica |
| Binomial name | |
| Varicellaria hemisphaerica | |
| Synonyms[1] | |
Varicellaria hemisphaerica is a species of crustose lichen belonging to the family Varicellariaceae.[2] It has an almost cosmopolitan distribution.[2]
Similar species
Varicellaria hemisphaerica can be distinguished from the closely related V. lactea by its substrate preference and morphological features: V. hemisphaerica grows exclusively on tree bark (corticolous), while V. lactea is found on rock surfaces (saxicolous). The species produces smaller soredia (40–100 μm in diameter) compared to V. lactea (110–180 μm). While both species contain lecanoric acid as their main secondary metabolite, the presence of variolaric acid can occur in both species and is not a reliable diagnostic feature. The thallus of V. hemisphaerica is typically pale bluish-grey, sometimes becoming pink in herbarium specimens, with a smooth and thin or cracked and thick texture, featuring convex soralia that are paler or the same colour as the thallus. Molecular phylogenetic studies have confirmed that V. hemisphaerica and V. lactea represent distinct species, with their divergence likely driven by their different substrate requirements. Both species associate with the same photobiont, Trebouxia sp. OTU A03.[3]
References
- ^ "Synonymy: Varicellaria hemisphaerica (Flörke) I. Schmitt & Lumbsch". Species Fungorum. Retrieved 28 March 2021.
- ^ a b "Varicellaria hemisphaerica (Flörke) Schmitt & Lumbsch". www.gbif.org. Retrieved 12 February 2021.
- ^ Kosecka, Magdalena; Oset, Magdalena (2024). "A shift in substrate requirement might cause speciation of the lichenized fungi, Varicellaria hemisphaerica and V. lactea (Pertusariales, Ascomycota)". Scientific Reports. 14 (1): e23514. doi:10.1038/s41598-024-74937-w. PMC 11464505. PMID 39384908.