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The genus Sigridea (Rocellaceae, Arthoniales, Euascomycetidae)
... The genus Bactrospora differs from similar genera Lecanactis and Opegrapha by lecideine ascomata, dark proper exciple and elongate, transversely septate, fragmenting ascospores (Ponzetti & McCune, 2006). The allopatric genus Sigridea was monographed by Tehler (1993) with four species worldwide. In India Nylander (1867) recorded single species of Sigridea as Platygrapha galucomoides Nyl. which is now known as Sigridea glaucomoides (Nyl.) ...
... Sigridea species are recognized by white thallus, circular ascomata, well developed thalline margin, hyaline, 3-septate, curved ascospores with one end tapering and the presence of psoromic acid. The closely related genus Schismatomma differs in having endophloeodal to incoherently organized thallus, poorly developed thalline margin, ± elongate ascomata and chemistry with roccellic acid (Tehler, 1993). ...
Three species of crustose lichens (Bactrospora acicularis, B. intermedia and Sigridea chloroleuca) belonging to the family Roccellaceae are reported here as new records for India. The taxonomic characters of each species were described briefly and supported by ecology, distribution and illustrations.
... genera researched, including Alyxoria(Ertz & Egea 2007), Angiactis Kantvilas et al. 2020b), Bactrospora (Egea & Torrente 1993a), Cresponea (Egea & Torrente 1993b), Dictyographa (Ertz & Tehler 2011; Ertz & Diederich 2007), Fouragea (Frisch et al. 2014; Sérusiaux et al. 2008), Lecanactis (Ryan & Tehler 2004), Lecanographa (Egea et al. 2004), Opegrapha (Egea et al. 2004), Paraschismatomma (Nash 2007; Ertz & Tehler 2011), Pentagenella (Aptroot & Schumm 2011; Tehler & Irestedt 2007), Sigridea(Tehler 1993), VigneroniaErtz et al. 2015), and Zwackhia(Ertz 2009; ...
Historical and recent material of Bacidia akompsa (basionym: Biatora akompsa) was studied to determine the taxonomic position of this crustose lichen, prompted by the appearance of the provisional name ''Lecanactis akompsa (Tuck.) ined.'' in multiple online lichen databases and checklists. Initial morphological assessment of verified material confirmed B. akompsa as a member of Arthoniales but distinct from Lecanactis by having epruinose ascomata with a thin exciple open below the hymenium; a pale, K/Iþ violet to deep blue hypothecium; and ascospores with a gelatinous sheath. Molecular phylogenetic analysis of specimens recently collected near the type locality revealed B. akompsa to be nested within the genus Pentagenella in Opegraphaceae. The same placement was found using phenotype-based phylogenetic binning with 37 morphological, anatomical and chemical characters. The new combination Pentagenella akompsa is proposed and the species represents the first North American member of this genus, otherwise known only from Chile and Peru. Therefore, our results reveal the genus Pentagenella to have a remarkably disjunct distribution between North and South America. Several specimens previously labeled as Bacidia, Biatora, or Lecanactis akompsa were found to be misidentifications, narrowing the range of P. akompsa to coastal California, where it is found on two coastal conifer species that are (like P. akompsa itself) narrowly endemic and of conservation concern.
... Thin Layer Chromatography was performed in solvent system C following Orange et al. (2001). The specimens were identified up to their species level and authenticated following literatures of Awasthi (1991Awasthi ( , 2007, Egea & Torrente (1993), Ertz & Diederich (2007), Ertz (2009), Joshi (2009), Nayaka (2004, Sparrius (2004), Tehler (1983Tehler ( , 1993, Upreti & Singh (1999) and Upreti et al. (2010). The nomenclature and classification was updated following Lumbsch & Huhndorf (2007). ...
The present communication reports 39 lichen species from Gujarat state, belonging to 23 genera
and 13 families. The lichens were collected mostly from 10 coastal districts of the state. A total of
21 species are new additions to the lichen mycota of Gujarat while 11 partially identified species
are expected to be new to science. The paper emphasizes the uniqueness of coastal habitats in terms
of interesting lichen mycota.
... Tehler (Fig. 1). The species was placed in Sigridea because of its crustose habit, white thallus, apothecia circular in outline, well-developed thalline margin, cortex plectenchymatous, curved bacilliform conidia and the chemistry with psoromic acid (Tehler 1993c). The species previously known from Brazil is here recorded for the first time from the Antilles (Guadeloupe and Martinique). ...
A two-locus phylogenetic hypothesis of the family Roccellaceae is presented based on data from the nuclear ribosomal large subunit (nucLSU) and the second largest subunit of RNA polymerase II (RPB2). This analysis includes 341 sequences (166 newly generated) and 180 specimens representing about 114 species. The genera Lecanactis, Roccellina, Schismatomma and Sigridea were found to be paraphyletic/polyphyletic. In order to make these groups monophyletic, the new genera Crocellina, Diromma, Gyrographa, Gyronactis, Ocellomma, Pseudoschismatomma, Psoronactis and Vigneronia are described. The genus Sagenidium is placed in synonymy with Lecanactis. The new species Enterographa incognita, Gyronactis asiatica and Lecanactis submollis are described. Several species of Opegrapha are transferred to the Roccellaceae. Sorediate morphs are recorded for the first time in the genus Syncesia.
Phlyctis atomella (Stirt.) S. Joseph, G. P. Sinha & S. Nayaka
comb. nov.
MycoBank No.: MB 835457
Platygrapha atomella Stirt., Proc. Roy. Philos. Soc. Glasgow 11, 317
(1879).—Schismatomma atomellum (Stirt.) Zahlbr., Cat. Lich.
Univ. 2, 553 (1924); type: India, Nilgiris [‘Neilghiri’],
D. G. Watt s. n. (BM—lectotype!).
Graphidastra himalayana Jagadeesh & G. P. Sinha,
Geophytology 39(1), 83 (2010); type: India, West Bengal,
Darjeeling district, Neora Valley National Park, Aloobari, secondary rainforest, on bark of Eurya acuminata, 27°07′31.7′′N,
88°43′03.9′′E, elev. 2484 m, 17.05.2008, Jagadeesh Ram 4360
(BSA—holotype!; CAL—isotype!), syn. nov.
Records of 48 species belonging to the order Arthoniales from Bolivia are presented. Cryptothecia rosae-iselae Flakus & Kukwa and Lecanactis minuta Ertz, Flakus & Kukwa are described as new to science. Thirty-seven species are reported for the first time from Bolivia, seven of which, Alyxoria apomelaena, Cryptothecia darwiniana, C. groenhartii, C. megalocarpa, Herpothallon furfuraceum, Lecanographa uniseptata, and Opegrapha subvulgata, are new to South America. This raises the number of Arthoniales known from the country up to 72. Two new combinations are proposed: Alyxoria apomelaena (A. Massal.) Ertz for Opegrapha apomelaena A. Massal. and Myriostigma napoense (Kalb & Jonitz) Kukwa for Cryptothecia napoensis Kalb & Jonitz. Cresponea melanocheiloides is the second species of the genus shown to contain a xantholepinone. Cresponea melanocheiloides is reported as new to Costa Rica and Panama, Cryptothecia megalocarpa as new to the Netherlands Antilles and Guyana and C. striata is new to Colombia, Costa Rica, French Guiana and the Netherlands Antilles. Distribution data are reported for each species, with taxonomic remarks provided for new and some problematic taxa.
The Socotran genus Feigeana is described as new, mainly characterized by its subfruticose thallus and together with the phltochemistry of the hitherto sole species Feigeana socotrana. The genus is placed into the Roccellaceae. keywords: Fei ge ana socotran a, Roccellaceae. Arthoniales, Socotra, Yemen, Indran Ocean.
The genus Dendrographa (Roccellaceae) is monographed. These fruticose lichenized ascomycetes are endemic to the Pacific coast of Baja California, Mexico and California, U.S.A. Two sexual species are recognized, both including anamorphic states here recognized as forms. These forms are dispersed by fragmentation. A new species. Dendrographa alectoroides and a new form, D. alectoroides f. parva are described. A new combination, Dendrographa leucophaea f. minor is made. Key, descriptions, distribution maps, and notes on chemistry and habitat are supplied.
The theory and principle of cladistic methodology are summarized, and exemplified by applied cladistics in ascomycete systematics and classifications. General topics touched upon are: competing systematic methods, monophyly, paraphyly, terminal taxa, character coding, ingroup, outgroup, character polarization, parsimony, character weighting, equally parsimonious trees, problems with tree instability, consensus trees, and classification.
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