Biology:Jamesiella chaverriae
| Jamesiella chaverriae | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Lecanoromycetes |
| Order: | Graphidales |
| Family: | Gomphillaceae |
| Genus: | Jamesiella |
| Species: | J. chaverriae
|
| Binomial name | |
| Jamesiella chaverriae Chaves, L.Umaña & Lücking (2006)
| |
| <mapframe zoom="6" frameless="1" align="center" longitude="-84.983333333333" latitude="10.716666666667" height="200" width="270">{"type":"Feature","geometry":{"coordinates":[-84.98333333333333,10.716666666666667],"type":"Point"},"properties":{"title":"Jamesiella chaverriae","marker-color":"#5E74F3"}}</mapframe> | |
| Holotype: Tenorio Volcano National Park, Costa Rica | |
Jamesiella chaverriae is a species of corticolous (bark-dwelling), crustose lichen in the family Gomphillaceae.[1] Described as a new species in 2006, it is found in Costa Rica and Brazil.
Taxonomy
Jamesiella chaverriae was first formally described by José Luis Chaves, Loengrin Umaña, and Robert Lücking in 2006. The species was discovered as part of the TICOLICHEN project, a large-scale biodiversity inventory of lichens in Costa Rica.[2] It was included in the first annotated checklist of Costa Rican fungi in 2024.[3]
The genus Jamesiella was created as a segregate from the larger genus Gyalideopsis based on detailed morphological analysis. Jamesiella chaverriae is closely related to other species in the genus, including J. anastomosans, J. scotica, and J. perlucida, which all share distinctive reproductive structures.[2]
Description
Jamesiella chaverriae has a thin, crustose (crust-like) thallus that grows continuously over its [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]]. The thallus is pale greenish-grey, slightly shiny (described as "[[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]]" in technical terminology), and smooth, lacking calcium oxalate crystals that are present in some related species. The thallus measures about 5–10 mm across and 10–20 μm thick, with a [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] outer layer.[2]
The species is distinguished by its unique reproductive structures called "[[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]]" (a specialized form of [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] – fungal reproductive structures). These structures are flask-shaped with an inflated lower part and a tapering, often thinly [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] (hair-like) apex. They measure 0.12–0.15 mm in height and 60–80 μm thick at the widest point, narrowing to 15–25 μm at the apex. The thlasidia are pale greenish-white and slightly translucent, with a constricted base that leaves a ring-shaped mark on the thallus surface when detached.[2]
Microscopically, the thlasidia are composed of densely packed, parallel ([[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]]) hyphae approximately 1 μm thick, with a more irregular tissue including small algal cells (3–5 μm in diameter) in the centre. The apex features a crown of thin hair-like structures formed by elongated fungal cells measuring 25–35 by 1 μm. No apothecia (disc-shaped fungal fruiting bodies) have been observed in this species, which distinguishes it from other members of the genus. The [[Glossary of lichen terms#{{biology:{1}}}|{{Biology:{1}}}]] (algal symbiote) is of the green algal genus Trebouxia, with cells measuring 5–8 μm in diameter.[2]
Habitat and distribution
Jamesiella chaverriae has been found growing on bark and rotting logs in lower montane cloud forests of Costa Rica, specifically in the Cordillera de Tilarán region. The type specimen was collected at Pilón Biological Station in Tenorio Volcano National Park, located 140 km (87 mi) northwest of San José and 25 km (16 mi) north-northwest of Tilarán, near Bijagua. This habitat is characterized by high humidity and persistent cloud cover. The lichen is found at an elevation of about 700 m (2,300 ft) in the lower montane cloud forest zone, particularly on exposed trees, fence posts, and wet rotting logs along pastures. The climate in this region is typically cool and moist throughout the year.[2] In 2022, J. chaverriae was reported from the states of Mato Grosso do Sul and Santa Catarina in Brazil.[4]
References
- ↑ "Jamesiella chaverriae Chaves, L. Umaña & Lücking". Species 2000: Naturalis, Leiden, the Netherlands. https://www.catalogueoflife.org/data/taxon/3QKV9.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 Lücking, Robert; Aptroot, André; Umaña, Loengrin; Chaves, José Luis; Sipman, Harrie J. M.; Nelsen, Matthew P. (2006). "A first assessment of the Ticolichen biodiversity inventory in Costa Rica: the genus Gyalideopsis and its segregates (Ostropales: Gomphillaceae), with a world-wide key and name status checklist". The Lichenologist 38 (2): 131–160. doi:10.1017/S0024282905005657.
- ↑ Mardones, Melissa; Umañan Tenorio, Loengrin; Granados Montero, María del Milagro; Mata Hidalgo, Milagro; Ruiz-Boyer, Armando; Piepenbring, Meike; Minter, David; Coto-López, Cristofer et al. (2024). "The first annotated checklist of Costa Rican fungi". Funga Latina 2: 15. doi:10.5281/ZENODO.14165034. https://www.researchgate.net/publication/385858963.
- ↑ Aptroot, André; Fernanda de Souza, Maria; Cáceres, Marcela Eugenia da Silva; Santos, Lidiane Alves dos; Spielmann, Adriano Afonso (2022). "New lichen records from Brazil". Archive for Lichenology 31: 1–51 [24]. http://fschumm.de/Archive/Vol%2031_Aptroot_new%20records.pdf.
Wikidata ☰ Q10539465 entry
 |  |
