Lepidocollema is a genus of lichens in the family Pannariaceae. It was circumscribed in 1890 to contain a single Brazilian species that has not been collected since. In 2016, the entire family was revised and updated, resulting in the expansion of Lepidocollema to 24 tropical species.
| Lepidocollema | |
|---|---|
| |
| Lepidocollema marianum in Keaau, Hawaii Island | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Lecanoromycetes |
| Order: | Peltigerales |
| Family: | Pannariaceae |
| Genus: | Lepidocollema Vain. (1890) |
| Type species | |
| Lepidocollema carassense Vain. (1890)
| |
Taxonomay edit
Lepidocollema was originally circumscribed in 1890 by Finnish lichenologist Edvard August Vainio with only the type species, L. carassense.[1] This lichen is a gelatinous Parmeliella-like species that has a photobiont from the genus Nostoc. It has only been collected once from Brazil. The family Pannariaceae was revised in 2014 with the help of molecular phylogenetics.[2] As a result, the genus was accepted and 23 tropical species were transferred into it, mostly from the genus Parmeliella. Phylogenetically, Lepidocollema is sister to Physma.[2]
Description edit
Lepidocollema is characterised by the formation of large, flat rosettes on a thick layer of rhizohyphae, the presence of a cellular thalline cortex, apothecia with a thalline margin, asci with a wide apical ring-structure, and thin-walled ascospores. Other than the type species, the thallus is heteromerous in all Lepidocollema species.[2] This refers to a tissue arrangement whereby the mycobiont (hyphae) and photobionts (algal cells) are arranged in distinct layers.
Species edit
- Lepidocollema adpressum (P.M.Jørg.) P.M.Jørg. (2014)
- Lepidocollema allochroum (Makhija & Adaw.) P.M.Jørg. (2014)
- Lepidocollema borbonicum (P.M.Jørg. & Schumm) P.M.Jørg. (2014)
- Lepidocollema brisbanense (C.Knight) P.M.Jørg. (2014)
- Lepidocollema carassense Vain. (1890)
- Lepidocollema cineratum (Zahlbr.) P.M.Jørg. (2014)
- Lepidocollema endoluteum (P.M.Jørg.) P.M.Jørg. (2014)
- Lepidocollema endomiltum (Vain.) P.M.Jørg. (2014)
- Lepidocollema exornatum (Zahlbr.) P.M.Jørg. (2014)
- Lepidocollema fuscatum (P.M.Jørg.) P.M.Jørg. (2014)
- Lepidocollema granuliferum (P.M.Jørg.) P.M.Jørg. (2014)
- Lepidocollema imbricatulum (Müll.Arg.) P.M.Jørg. (2014)
- Lepidocollema leiostroma (Nyl.) P.M.Jørg. (2014)
- Lepidocollema macrosporum (Makhija & Adaw.) P.M.Jørg. (2014)
- Lepidocollema marianum (Fr.) P.M.Jørg. (2014)
- Lepidocollema montanum (P.M.Jørg. & Sipman) P.M.Jørg. (2014)
- Lepidocollema nitidum (P.M.Jørg. & Sipman) P.M.Jørg. (2014)
- Lepidocollema pannarioides (P.M.Jørg. & Sipman) P.M.Jørg. (2014)
- Lepidocollema papillatum (P.M.Jørg.) P.M.Jørg. (2014)
- Lepidocollema polyphyllinum (P.M.Jørg.) P.M.Jørg. (2014)
- Lepidocollema stylophorum (Vain.) P.M. Jørg. (2014)
- Lepidocollema wainioi (Zahlbr.) P.M.Jørg. (2014)
- Lepidocollema zeylanicum (P.M.Jørg.) P.M.Jørg. (2014)
References edit
- ^ Wainio, Edvard August (1890). Étude sur la classification naturelle et la morphologie des Lichens du Brésil, I–II. Acta Societatis pro Fauna et Flora Fennica (in French and Latin). Vol. 7. Helsinki: J. Simelius. p. 231.
- ^ a b c Ekman, Stefan; Wedin, Mats; Lindblom, Louise; Jørgensen, Per M. (2014). "Extended phylogeny and a revised generic classification of the Pannariaceae (Peltigerales, Ascomycota)". The Lichenologist. 46 (5): 627–656. doi:10.1017/S002428291400019X.