Lendemeriella
Lendemeriella S.Y. Kondr., in Kondratyuk et al., Acta bot. hung. 62(1-2): 116 (2020).
Index Fungorum number: IF 834211; Facesoffungi number: FoF 11742, 8 morphological species (Species Fungorum 2022), 8 species with molecular data.
Thallus crustose, thin and areolate or subsquamulose, whitish to dark grey near apothecia, often with bluish tinge, or grey-brown, to mostly indistinct. Sexual morph: Vegetative diaspore rarely present (only in L. sorocarpa and L. reptans). Soralia if present discrete, laminal becoming excavate as evacuated by soredia. Hypothallus dark, rarely present. Apothecia biatorine with egg-yellow, yellow-orange, yellow-olive, reddish yellow to reddish brown, rusty red or blackish brown, grey-olive disc and own margin concolorous or somewhat lighter of disc, often with brownish, greyish brown or blackish brown outermost portion, or lecanorine, with thalline margin concolorous with thallus. Epihymenium dark, brown, olive green to reddish brown. Paraphyses simple to sparingly branched at the top, with one or two capitate uppermost cells. Asci clavate, Teloschistes type, with eight spores. Ascospores polardiblastic, ellipsoid, sometimes very long. Ascospore septum sometimes only initial or rather thin. Asexual morph: Conidiomata recorded only for a few species. Conidia bacilliform. Chemistry: Thallus K–, N– or N+ violet; disc of apothecia K+ red, C+ reddish brown. Anthraquinones are absent in thallus; apothecia (disc or both disc and margin) contain parietin (major), emodin (minor) and traces of emodinal, emodic acid, parietinic acid and fallacinal, rarely 7-chloroemodin, while some species are characterised by presence of large amount of sedifolia grey in all parts of the thallus and in apothecial margin (adapted from Kondratyuk et al. 2020).
Type species: Lendemeriella reptans (Lendemer & B.P. Hodk.) S.Y. Kondr.
Notes: Lendemeriella is characterised by yellow-olive, reddish yellow to reddish brown apothecia, brown, olive green to reddish brown epihymenium, clavate, Teloschistes type, 8-spored asci and polardiblastic, ellipsoid ascospores. The asexual morph is characterised by bacilliform conidia. Lendemeriella resembles Olegblumia but differs in having crustose or subsquamulose thallus and parietin chemosyndrome and sedifolia grey or Lecidea green pigment in the cortex of thallus and exciple while Olegblumia has lobate thallus and vicanicin and caloplacoicin pigment. Lendemeriella also differs from Olegblumia in having different ecology and distribution. Lendemeriella resembles Bryoplaca in having same host and distribution but differs in having crustose or subsquamulose thallus and different chemosyndrome type. Lendemeriella is also similar to Blastenia in having dark brown to rusty brown or rusty reddish margin and disk of apothecia but differs in having poorly developed thallus, wider variation of ascospores and ascospore septum. Lendemeriella share similarities with Erichansenia in having Lecidea green pigment in the cortex of thallus and exciple. Lendemeriella was earlier thought to belong to ‘Caloplaca’ conversa/conglomerata and ‘Caloplaca’ exsecuta group (Vondrák et al. 2019). Vondrák et al. (2019) mentioned four species Lendemeriella exsecuta, L. nivalis, L. sorocarpa and L. tornoensis as members of the ‘Caloplaca’ exsecuta group but this was unclear due to lack of molecular data. Lendemeriella is currently a distinct genus in Teichosporaceae. Molecular markers available for Lendemeriella include ITS, LSU and mtSSU sequences. More collections with DNA sequence data are needed to clarify the taxonomic position of the species mentioned by Vondrák et al. (2019).
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