A revision of<i>Leptogium</i>species with spherical-celled hairs (section<i>Mallotium</i>p.p.)

Kitaura, Marcos Junji; Marcelli, Marcelo Pinto

doi:10.1639/0007-2745-116.1.015

Cited by 17 publications

(17 citation statements)

References 5 publications

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“…Sections were hand-cut and all specimens were studied and described according to Kitaura & Marcelli (2013), using the same terminology but the sequence of characteristics was changed here. The term “lobule” was applied only to ornamentation with constricted bases, appearing to be vegetative propagules (Hale 1983).…”

Section: Methodsmentioning

confidence: 99%

“…Crenulate, verruciform and denticular appendages without constricted bases were considered functionally vegetative and are mentioned in the description when present. Lobules originating from cracks in the thallus were not considered ornamentation and the term “corona” is used according to Kitaura & Marcelli (2013). The thalline exciple is the tissue or all the tissues outermost to the proper exciple of a lecanorine apothecium (Kirk et al 2008), including the cortex of thalline exciple that can be composed of thick paraplectenchymatous tissue.…”

Section: Methodsmentioning

confidence: 99%

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A revision ofLeptogium(Collemataceae, lichenized Ascomycota) from Antarctica with a key to species

et al. 2018

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With more than 180 known species, Leptogium has its greatest richness in tropical regions. Only three species have so far been reported from Antarctica but extensive surveys in the Antarctic Maritime Islands have shown that this is an underestimate. Leptogium antarcticum (non-isidiate, with medulla composed of columnar hyphae), L. marcellii (non-isidiate, with medulla composed of a sponge-like arrangement of hyphae) and L. tectum (isidiate, with medulla composed of columnar hyphae) are described here as new to science. The new species are compared with those already reported for the genus in Antarctica, namely L. crispatellum, L. menziesii and L. puberulum, and an identification key is provided. Sequences of ITS and mrSSU regions were obtained from recently collected L. antarcticum, L. marcellii, L. puberulum and L. tectum specimens. Morphological and anatomical data were compared along with available genetic data in order to delimit these species more accurately, using an integrative approach.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

A revision ofLeptogium(Collemataceae, lichenized Ascomycota) from Antarctica with a key to species

et al. 2018

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“…Both species share the brownish to bluish grey lobes with predominantly laminal isidia, short tomentum of spherical-celled hyphal hairs mainly on the lower surface, and lobe striation. While apothecia are present in some of the specimens of L. krogiae investigated, fertile specimens are unknown for L. hibernicum (Kitaura & Marcelli 2013; M. Bendiksby, T. Bjelland, A. Frisch, M. H. Jørgensen & M. Görts, unpublished data). Morphological differences are mainly observed in the degree of striation of the upper lobe surface, lobe thickness, the length of the Nostoc filaments, and isidium shape.…”

Section: The Speciesmentioning

confidence: 99%

“…2013). Over 50 species with a Mallotium -type thallus are currently accepted (Kitaura & Marcelli 2013), including a large number of recently described taxa (Jørgensen 1973 a , b , 1997; Awasthi & Akhtar 1977; Jørgensen & Kashiwadani 2008; Jørgensen & Olley 2010; Kitaura & Marcelli 2012, 2013; Kitaura et al . 2014, 2015).…”

Section: Introductionmentioning

confidence: 99%

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Geographically disjunct phylogenetic lineages inLeptogium hibernicumrevealLeptogium krogiaesp. nov. from East Africa

Bjelland¹,

Bendiksby

Frisch

2017

The Lichenologist

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Phylogenetic analyses of nuclear (Mcm7, nrITS, nrLSU) and mitochondrial (mrSSU) DNA sequences revealed geographically disjunct lineages in Leptogium hibernicum. One of these lineages is described here as Leptogium krogiae, which differs from L. hibernicum in the thinner thallus (190–210 µm vs. 390–480 µm), shallowly striate lobes instead of deeply furrowed lobes, isidia that are seldom distinctly flattened, and apothecia with a subhymenial euparaplectenchymatous layer. Leptogium krogiae is a widespread epiphyte in mist-affected woodlands and montane forests in East Africa and appears to be a common species.

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A revision of theLeptogium saturninumgroup in North America

Stone¹,

Hinds

Anderson³

et al. 2016

The Lichenologist

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A revision of the North American members of the Leptogium saturninum group (i.e. species with long lower-surface hairs, isidia, and usually smooth upper surface) is presented based on molecular phylogenetic analyses of mtSSU and nrITS sequence data, together with an extensive morphological study. Three species supported by both molecular and morphological characteristics are recognized: L. acadiense sp. nov. (distinguished by granular saturninum-type isidia, medulla composed of irregularly arranged or perpendicular hyphae), L. cookii sp. nov. (distinguished by cylindrical saturninum-type isidia) and L. hirsutum (distinguished by hirsutum-type isidia and medulla composed of loosely intertwined hyphae). One species supported by morphological characteristics, but for which no molecular data could be generated, is also recognized: L. compactum sp. nov. (distinguished by hirsutum-type isidia and medulla composed of tightly packed hyphae). Finally, L. saturninum (distinguished by granular saturninum-type isidia and medulla composed of perpendicular and parallel hyphae) is supported by morphological characteristics but molecular data from geographically diverse populations, including those near the type locality, indicate that the morphologically defined species is paraphyletic. Leptogium burnetiae is excluded from North American based on morphological study of the type. The species are described and illustrated in detail, and are distinguished morphologically by their isidium development, morphology of mature isidia, and pattern of hyphae in the medulla in transverse sections near lobe margins. A key to the members of the L. saturninum group and related species is also presented.

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A revision ofLeptogiumspecies with spherical-celled hairs (sectionMallotiump.p.)

Cited by 17 publications

References 5 publications

A revision ofLeptogium(Collemataceae, lichenized Ascomycota) from Antarctica with a key to species

A revision ofLeptogium(Collemataceae, lichenized Ascomycota) from Antarctica with a key to species

Geographically disjunct phylogenetic lineages inLeptogium hibernicumrevealLeptogium krogiaesp. nov. from East Africa

A revision of theLeptogium saturninumgroup in North America

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