# Gyalectidium laciniatum

> Mediated Wiki article. Canonical URL: https://mediated.wiki/source/Gyalectidium_laciniatum
> Markdown URL: https://mediated.wiki/source/Gyalectidium_laciniatum.md
> Source: https://en.wikipedia.org/wiki/Gyalectidium_laciniatum
> Source revision: 1335367536
> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)

Species of lichen-forming fungus

Gyalectidium laciniatum Scientific classification Kingdom: Fungi Division: Ascomycota Class: Lecanoromycetes Order: Graphidales Family: Gomphillaceae Genus: Gyalectidium Species: G. laciniatum Binomial name Gyalectidium laciniatum Lücking (2001) Holotype: Orosi Valley, Cartago Province, Costa Rica

***Gyalectidium laciniatum*** is a species of [lichen](/source/Lichen) in the family [Gomphillaceae](/source/Gomphillaceae).[1] It is a [leaf-dwelling lichen](/source/Foliicolous_lichen) known from Central and South America, including Costa Rica, Bolivia, and Brazil. The species is characterized by its distinctive irregularly fringed or cut reproductive structures that arise from crescent-shaped whitish crystalline bulges on the [thallus](/source/Thallus) surface, giving it an intermediate appearance between related species with simpler and more elaborate scale forms.

## Taxonomy

*Gyalectidium laciniatum* was [described](/source/Species_description) as a new species in 2001 by [Robert Lücking](/source/Robert_L%C3%BCcking). In the original account it was discussed as intermediate between *[Gyalectidium verruculosum](/source/Gyalectidium_verruculosum)* and *[G. eskuchei](https://en.wikipedia.org/w/index.php?title=Gyalectidium_eskuchei&action=edit&redlink=1)*, combining a crescent-shaped crystalline bulge at the base of the [hyphophore](/source/Glossary_of_lichen_terms#hyphophore) scale (as in the former) with a more dissected, irregular scale form that approaches the "[setose](/source/Glossary_of_lichen_terms#setose)" appearance seen in the latter.[2]

## Description

The [thallus](/source/Thallus) forms rounded patches about 2–5 mm in diameter. It is finely [verrucose](/source/Glossary_of_lichen_terms#verrucose) and greenish to greenish gray.[2]

Hyphophores ([asexual reproductive](/source/Asexual_reproduction) structures) are produced on the thallus surface. Their scales are well developed and are usually borne from a crescent-shaped, whitish crystalline bulge. The scales are obliquely oriented and [laciniate](/source/Glossary_of_lichen_terms#laciniate) (irregularly cut or fringed) or bear irregular lateral projections. They measure about 0.15–0.25 mm long and 0.2–0.3 mm broad, and are whitish translucent, sometimes slightly orange. The visible surface of the diahyphal mass (the underlying reproductive tissue) is greenish. [Apothecia](/source/Apothecia) and [pycnidia](/source/Pycnidia) have not been reported for this species.[2]

## Habitat and distribution

Ferraro and colleagues reported *Gyalectidium laciniatum* only from the [type](/source/Type_(biology)) collection in Costa Rica ([Cartago Province](/source/Cartago_Province), Orosi Valley). It was collected on leaves of trees along a road, and the authors therefore described it as occurring in relatively [disturbed](/source/Disturbance_(ecology)) vegetation. They also noted that *[Gyalectidium denticulatum](/source/Gyalectidium_denticulatum)* was found in the same collection.[2] *Gyalectidium laciniatum* has since been reported from Bolivia[3] and Brazil.[4]

## References

1. **[^](#cite_ref-CoL_3HNNZ_1-0)** ["*Gyalectidium laciniatum* Lücking"](https://www.catalogueoflife.org/data/taxon/3HNNZ). *[Catalogue of Life](/source/Catalogue_of_Life)*. [Species 2000](/source/Species_2000): Leiden, the Netherlands. Retrieved January 27, 2026.

1. ^ [***a***](#cite_ref-Ferraro_et_al._2001_2-0) [***b***](#cite_ref-Ferraro_et_al._2001_2-1) [***c***](#cite_ref-Ferraro_et_al._2001_2-2) [***d***](#cite_ref-Ferraro_et_al._2001_2-3) Ferraro, Lidia I.; Lücking, Robert; Sérusiaux, Emmanuël (2001). ["A world monograph of the lichen genus *Gyalectidium* (Gomphillaceae)"](https://doi.org/10.1111%2Fj.1095-8339.2001.tb01126.x). *Botanical Journal of the Linnean Society*. **137** (3): 311–345. [doi](/source/Doi_(identifier)):[10.1111/j.1095-8339.2001.tb01126.x](https://doi.org/10.1111%2Fj.1095-8339.2001.tb01126.x).

1. **[^](#cite_ref-Flakus_2013_3-0)** Flakus, Adam (2013). ["Foliicolous lichenized fungi of lowland Amazon forests in Pando, Bolivia"](https://doi.org/10.2478%2Fpbj-2013-0063). *Polish Botanical Journal*. **58** (2): 539–554. [doi](/source/Doi_(identifier)):[10.2478/pbj-2013-0063](https://doi.org/10.2478%2Fpbj-2013-0063).

1. **[^](#cite_ref-Santos_et_al._2020_4-0)** Santos, Viviane M.; da Silva Cáceres, Marcela E.; Lücking, Robert (2020). "Diversity of foliicolous lichens in isolated montane rainforests (Brejos) of northeastern Brazil and their biogeography in a neotropical context". *Ecological Research*. **35** (1): 182–197. [doi](/source/Doi_(identifier)):[10.1111/1440-1703.12071](https://doi.org/10.1111%2F1440-1703.12071).

Taxon identifiers Gyalectidium laciniatum Wikidata: Q21271014 Wikispecies: Gyalectidium laciniatum CoL: 3HNNZ GBIF: 3419812 IndexFungorum: 478131 MycoBank: 478131 Open Tree of Life: 3784799 SpeciesFungorum: 478131

---
Adapted from the Wikipedia article [Gyalectidium laciniatum](https://en.wikipedia.org/wiki/Gyalectidium_laciniatum) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Gyalectidium_laciniatum?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.