FIG 2
A, C & E, Atla alaskana (holotype); A, thallus; C, section of ascoma; E, mature spores. B, D & F, A. recondita (holotype); B, thallus; D, section of ascoma; F, mature spores. Scales: A 5 0?9 mm, B 5 0?5 mm, C 5 200 mm, D 5 100 mm, E & F 5 20 mm.
Source publication
Two new species in the lichen genus Atla, A. alaskana and A. recondita, are described. The ITS rDNA region is used for their molecular characterization. Morphologically, Atla alaskana is characterized by its rather thick and well-developed whitish grey thallus, and the rather large perithecia having a thalline excipulum. The presence of a thalline...
Citations
... Recently, many new species of Verrucaria, Polyblastia and related genera have been described from calcareous rocks of Europe Tibell 2008, 2012;Breuss and Berger 2012;Orange 2014Orange , 2020Tibell and Tibell 2015;Pykälä and Myllys 2016;Pykälä et al. 2017aPykälä et al. , b, 2018Pykälä et al. , 2019Pykälä et al. , 2020. However, during that time, only one new species of Thelidium has been described from Europe (Ceynowa-Giełdon 2007). ...
The taxonomy of lichen species morphologically similar to Thelidium auruntii and T. incavatum in Finland is being revised. Based on ITS and morphology, ten species occur in Finland. All species are restricted to calcareous rocks. The Thelidium auruntii morphocomplex includes six species: T. auruntii , T. huuskonenii sp. nov. , T. pseudoauruntii sp. nov. , T. sallaense sp. nov, T. toskalharjiense sp. nov. and T. sp. 1. In the ITS phylogeny, T. auruntii , T. pseudoauruntii and T. sallaense group together, but the remaining species are placed outside of this clade. All the species have northern distribution in Finland, occurring on fells in NW Finland and/or in gorges in the Oulanka area in NE Finland. The Thelidium incavatum morphocomplex includes four species: T. declivum sp. nov. , T. incavatum , T. mendax sp. nov. and T. sp. 2. This morphogroup is not resolved as monophyletic in the ITS phylogeny, with only T. declivum and T. mendax forming a strongly supported group. Thelidium incavatum is rather common in SW Finland, with one separate locality in eastern Finland. Thelidium declivum occurs only in the Oulanka area. Thelidium mendax occurs in the Oulanka area, but one locality is known from eastern central Finland. Thelidium sp. 2 is known from one locality in SW Lapland.
... Obermayer (1994), who described it in detail, and outside of those countries it has been found only in Norway (Ihlen 1998 (Table 1). This appears to be the first report of the species since it was described from Sweden by Tibell & Tibell (2015 Westberg). An uncommon species reported in AK from the Bering Sea and several locations in inland western AK (Thomson 1997). ...
Lichens are widely acknowledged to be a key component of high latitude ecosystems. However, the time investment needed for full inventories and the lack of taxonomic identification resources for crustose lichen and lichenicolous fungal diversity have hampered efforts to fully gauge the depth of species richness in these ecosystems. Using a combination of classical field inventory and extensive deployment of chemical and molecular analysis, we assessed the diversity of lichens and associated fungi in Glacier Bay National Park, Alaska (USA), a mixed landscape of coastal boreal rainforest and early successional low elevation habitats deglaciated after the Little Ice Age. We collected nearly 5000 specimens and found a total of 947 taxa, including 831 taxa of lichen-forming and 96 taxa of lichenicolous fungi together with 20 taxa of saprotrophic fungi typically included in lichen studies. A total of 98 species (10.3% of those detected) could not be assigned to known species and of those, two genera and 27 species are described here as new to science: Atrophysma cyanomelanos gen. et sp. nov., Bacidina circumpulla , Biatora marmorea , Carneothele sphagnicola gen. et sp. nov., Cirrenalia lichenicola , Corticifraga nephromatis , Fuscidea muskeg , Fuscopannaria dillmaniae , Halecania athallina , Hydropunctaria alaskana , Lambiella aliphatica , Lecania hydrophobica , Lecanora viridipruinosa , Lecidea griseomarginata , L. streveleri , Miriquidica gyrizans , Niesslia peltigerae , Ochrolechia cooperi , Placynthium glaciale , Porpidia seakensis , Rhizocarpon haidense , Sagiolechia phaeospora , Sclerococcum fissurinae , Spilonema maritimum , Thelocarpon immersum , Toensbergia blastidiata and Xenonectriella nephromatis . An additional 71 ‘known unknown’ species are cursorily described. Four new combinations are made: Lepra subvelata (G. K. Merr.) T. Sprib., Ochrolechia minuta (Degel.) T. Sprib., Steineropsis laceratula (Hue) T. Sprib. & Ekman and Toensbergia geminipara (Th. Fr.) T. Sprib. & Resl. Thirty-eight taxa are new to North America and 93 additional taxa new to Alaska. We use four to eight DNA loci to validate the placement of ten of the new species in the orders Baeomycetales , Ostropales , Lecanorales , Peltigerales , Pertusariales and the broader class Lecanoromycetes with maximum likelihood analyses. We present a total of 280 new fungal DNA sequences. The lichen inventory from Glacier Bay National Park represents the second largest number of lichens and associated fungi documented from an area of comparable size and the largest to date in North America. Coming from almost 60°N, these results again underline the potential for high lichen diversity in high latitude ecosystems.
... Atla S.Savić & Tibell is a recently described genus, separated from Polyblastia on the basis of molecular data (Savić & Tibell 2008, Gueidan et al. 2009, Tibell & Tibell 2015. To date, it accomodates six species: A. alaskana S. Tibell & Tibell, A. alpina S.Savić & Tibell, A. palicei S.Savić & Tibell, A. praetermissa S.Savić & Tibell, A. recondita S.Tibell & Tibell, and A. wheldonii (Travis) S. Savić & Tibell, of which the first five species are saxicolous and A. wheldonii grows on calcareous soil. ...
Atla wheldonii is reported for the first time from Poland. This species was found in a calcareous zone of the Góry
Kaczawskie Mountains (the Sudetes, SW part of the country), growing on soil in the bottom of an abandoned marble
quarry. Brief characteristics and notes on habitat preferences and general distribution of the species are given.
... Atla S.Savić & Tibell is a recently described genus, separated from Polyblastia on the basis of molecular data (Savić & Tibell 2008, Gueidan et al. 2009, Tibell & Tibell 2015. To date, it accomodates six species: A. alaskana S. Tibell & Tibell, A. alpina S.Savić & Tibell, A. palicei S.Savić & Tibell, A. praetermissa S.Savić & Tibell, A. recondita S.Tibell & Tibell, and A. wheldonii (Travis) S. Savić & Tibell, of which the first five species are saxicolous and A. wheldonii grows on calcareous soil. ...
Atla wheldonii is reported for the first time from Poland. This species was found in a calcareous zone of the Góry
Kaczawskie Mountains (the Sudetes, SW part of the country), growing on soil in the bottom of an abandoned marble
quarry. Brief characteristics and notes on habitat preferences and general distribution of the species are given.
... In Sporodictyon perithecia are usually thinly or thickly covered by thalline tissue, unlike those in most species of Atla. However, two species of Atla are characterized by perithecia with a thalline cover, which does not reach the ostiolum (Savić & Tibell 2009;Tibell & Tibell 2015). In some species of Sporodictyon cephalodia are frequent, whereas cephalodia have not previously been reported from Atla. ...
... palicei Savić & Tibell and A. praetermissa Savić & Tibell) were described from Scandinavia by . Recently, Tibell & Tibell (2015) described the new species A. alaskana S. Tibell & Tibell from Alaska and A. recondita S. Tibell & Tibell from Sweden. All the known species of Atla occur in calcareous habitats: A. wheldonii is restricted to calcareous soil, while the remaining five species are found on calcareous or calciferous rocks. ...
... The main morphological differences between Atla and Sporodictyon have been the lack of cephalodia and usual absence of thalline cover of perithecia in Atla. Tibell & Tibell (2015) emphasized that thalline cover (if present) in Atla does not reach close to the ostiolum, unlike in Sporodictyon where it often (almost) reaches the ostiolum. However, A. oulankaensis and A. tibelliorum have cephalodia or cephalodia-like structures, and the perithecia of A. tibelliorum are thickly covered by the thallus up to the ostiolum. ...
Three new species of
Atla
are described from calcareous rocks in northern Finland based on morphology and ITS sequences. All new species have dark brown spores but have smaller perithecia and spores than previously known brown-spored species of
Atla
.
Atla tibelliorum
sp. nov. resembles
Sporodictyon arcticum
, but has a dark brown exciple and larger spores.
Atla oulankaensis
sp. nov. and
A. vitikainenii
sp. nov. differ from
A. alpina
in the smaller perithecia and spores
. Atla vitikainenii
has an involucrellum often slightly diverging from the exciple.
Atla oulankaensis
is similar to
A. vitikainenii
, differing in slightly narrower spores and in having some involucrella incurving under the exciple or even enveloping the exciple. An unidentified ITS sequence from Canada obtained from GenBank most probably belongs to
A. oulankaensis
and another unidentified sequence from the USA to
A. tibelliorum
. The new results strengthen the conclusion that the genera of
Atla
and
Sporodictyon
cannot be separated by morphology alone. A key to all known species of
Atla
and
Sporodictyon
is provided.
