Fungalpedia – Note 535, Langeottia 

 

Langeottia S.Y. Kondr., Kärnefelt, Elix, A. Thell & Hur

Citation when using this data: Tibpromma et al. 2024 (in prep.) – Fungalpedia, Ascomycota.

Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig. 1 

Classification: Teloschistaceae, Teloschistales, Lecanoromycetidae, Lecanoromycetes, Pezizomycotina, Ascomycota, Fungi.

Based on phylogenies of multi-gene (ITS, LSU and mtSSU) sequences analyses, Kondratyuk et al. (2014) proposed Langeottia as a new genus within Teloschistaceae, Teloschistales in Lecanoromycetes with the type species Langeottia ottolangei. This species was initially described as Jackelixia ottolangei by Wirth and Kondratyuk (2010). The genus is characterized by a grey foliose thallus with a violet tinge and may exhibit a whitish pruina, turning greenish or greenish-grey when wet. The thallus lobes gradually widen towards the tips, with small lateral lobules and subdivided terminal fragments, often forming an entire layer. The lobes are thick and closely appressed to the substrate, with margins turning down, and numerous Dufourea-type rhizines (Kondratyuk et al. 2008, 2013, Fedorenko et al. 2009, 2012, Wirth & Kondratyuk 2010). The upper cortex of the thallus often has an upper epinecral layer, and the hyaline cortical layer approaches a palisade-type. The medulla is rather thick, with hyphal bunches, whereas the lower cortex consists of thick-walled cells made up of mesodermatous paraplectenchyma. 

Apothecia are of lecanorine type, with the disc originally yellowish-orange, later turning brownish-orange to dark brown-orange. The true exciple exhibited leptodermatous paraplectenchymatous characteristics in the uppermost lateral portion and “textura intricata” in the basal portion. 8-spored asci, ascospores colorless and polaricular, and spermatia are broadly ellipsoid to short, broadly bacilliform. To date, two South African species have been included in this genus. Later, Arup et al. (2013) indicated that they are conspecific, and the type material of L. hirsuta (herb. Z) was unavailable for comparative research. In addition, L. ottolangei is characterized by its wider ascospores, whereas L. hirsuta has hairs on the top cortex (Eichenberger et al. 2007, Wirth & Kondratyuk 2010). Wilk et al. (2021) combined L. ottolangei and Dufourea ottolangei based on multi-gene molecular phylogeny.

Type species: Langeottia ottolangei (treat as Dufourea ottolange) (S.Y. Kondr., Kärnefelt & V. Wirth) S.Y. Kondr., Kärnefelt, Elix, A. Thell, J. Kim, M.H. Jeong, N.N. Yu, A.S. Kondr. & Hur

Other accepted species: Species Fungorum – search Langeottia

 

Figure 1 – Habit of Langeottia ottolangei (= Jackelicia ottolangei). Redrawn from Wirth and Kondratyuk (2010).

 

References

Arup U, Søchting U, Frödén P. 2013 – A new taxonomy of the family Teloschistaceae. Nordic Journal of Botany 31, 16–83.

Eichenberger C, Aptroot A, Honegger R. 2007– Three new Xanthoria species from South Africa: X. hirsuta, X. inflata and X. doidgeae. Lichenologist 39(5), 451–458.

Fedorenko NM, Stenroos S, Thell A, Kärnefelt I. et al. 2009 – A phylogenetic analysis of xanthorioid lichens (Teloschistaceae, Ascomycota) based on ITS and mtSSU sequences. Bibliotheca lichenologica 100, 49–84. 

Fedorenko NM, Stenroos S, Thell A, Kärnefelt I. et al. 2012 – Molecular phylogeny of xanthorioid lichens (Teloschistaceae, Ascomycota), with notes on their morphology. Bibliotheca lichenologica 108, 45–64.

Kondratyuk S, Kärnefelt I, Thell A, Elix J. et al. 2014 – A revised taxonomy for the subfamily Caloplacoideae (Teloschistaceae, Ascomycota) based on molecular phylogeny. Acta Botanica Hungarica 56(1-2), 141–178.

Kondratyuk SY, Fedorenko NM, Jeong MH, Stenroos S. et al. 2013 – Phylogenetic analysis of lichen-forming fungi of the family Teloschistaceae (Ascomycota) after nuclear and mitochondrial DNA sequences.In: Kondratyuk, S. Y. (ed.): Molecular phylogeny and modern taxonomy of terrestrial sporen plants. Nauk. dumka, Kiev pp. 7–57.

Kondratyuk SY, Kärnefelt I, Elix JA, Thell A. 2008 – A new circumscription of the genus Xanthodactylon (Teloschistaceae, lichenized ascomycetes). Sauteria 15, 265–282.

Wirth V, Kondratyuk SY. 2010 – Neue Arten der Flechtenfamilie Teloschistaceae aus der Namibwüste und der Sukkulenten-Karoo (SW-Afrika). Herzogia 23(2), 179–194.

Wilk K, Pabijan M, Saługa M, Gaya E, Lücking R. 2021 – Phylogenetic revision of South American Teloschistaceae (lichenized Ascomycota, Teloschistales) reveals three new genera and species. Mycologia 113(2), 278–299. 

 

Entry by

Lu W, Excellence Center of Microbial Diversity and Sustainable Utilization, Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand; Center for Yunnan Plateau Biological Resources Protection and Utilization, College of Biological Resource and Food Engineering, Qujing Normal University, Qujing, Yunnan 655011, China

 

(Edited by Saowaluck Tibpromma, Samaneh Chaharmiri-Dokhaharani, & Achala R. Rathnayaka)

 

Published online 9 December 2024

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