Myxomycete diversity of the Patagonian Steppe and bordering areas in Argentina

Lado, Carlos; Basanta, Diana Wrigley de; Estrada–Torres, Arturo; García-Carvajal, Eva

doi:10.3989/ajbm.2394

Cited by 14 publications

(12 citation statements)

References 35 publications

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“…3A), globose, 8.5-9(-9.5) μm in total range, 9.0 ± 0.2 µm on average ± SD (S = 30), about ¾ of the spore surface covered by a complete reticulum, the rest covered by an interrupted reticulum (FIG. 3C), like in other South American collections (Lado et al 2014), the ornamentation appears reticulate type with perforated muri visible only under SEM (FIG. 3F).…”

Section: Resultssupporting

confidence: 61%

“…Ecology and distribution: Cosmopolitan. Reported in the SH from Australia (Martin and Alexopoulos 1969), New Zealand (Rawson 1937;Mitchell 1992;Stephenson 2003), and South America in Chile, Argentina, and Paraguay (McHugh 2009;Lado et al 2013Lado et al , 2014. The species is not nivicolous (e.g., Poulain et al 2011), occurring in winter months in Europe as a cold-period myxomycete (Chachuła et al 2017).…”

Section: Resultsmentioning

confidence: 99%

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Nivicolous Trichiales from the austral Andes: unexpected diversity including two new species

et al. 2020

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Nivicolous myxomycetes are a group of amoebozoan protists dependent on long-lasting snow cover worldwide. Recent fine-scale analysis of species diversity from the austral Andes revealed high intraspecific variability of most taxa, suggesting independent evolutionary processes and significant differences in species compositions between the Northern (NH) and Southern (SH) Hemispheres. The present study is the second part of this analysis based on representatives of Trichiales. A total of 173 South American collections were studied based on morphological and molecular data, and 15 taxa have been identified. Two of them, Hemitrichia crassifila and Perichaena patagonica, are proposed as new species confirmed by a phylogeny of Trichiales. However, their affinity to the genera in which they are proposed are not confirmed due to polyphyletic character of all genera of Trichiales. Four species, Dianema subretisporum, Trichia contorta var. karstenii, T. nivicola, and T. sordida, are reported for the first time from the Southern Hemisphere. One species, T. alpina, is new for Argentina. Additionally, we provide the first record of Perichaena megaspora from Chile. Specimen frequency and species diversity of Trichiales found at nivicolous localities in the austral Andes are unexpectedly high, exceeding those of Stemonitidales, the most numerous group in the Northern Hemisphere, where Trichiales play a marginal role. By contrast, Trichiales appear the main component of nivicolous assemblages in the Andes. Results of the present work, together with the earlier analysis of Stemonitidales, indicate that the Andes constitute an exceptionally important evolutionary hot spot for nivicolous myxomycetes characterized by an outstanding species diversity.

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Section: Resultssupporting

confidence: 61%

Section: Resultsmentioning

confidence: 99%

Nivicolous Trichiales from the austral Andes: unexpected diversity including two new species

et al. 2020

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“…In terms of biogeography, most studies have been carried out in temperate regions of the Northern Hemisphere, including alpine and subalpine mountains (Ronikier & Ronikier, ; Novozhilov et al ., ), tundra (Novozhilov et al ., ; Stephenson et al ., ), winter‐cold deserts (Schnittler & Novozhilov, ; Schnittler, ; Novozhilov & Schnittler, ) and temperate grasslands (Rollins & Stephenson, ). Only recently have other parts of the world, such as tropical zones, warm deserts or the Patagonian steppe been studied systematically (Estrada‐Torres et al ., ; Wrigley de Basanta et al ., ; Lado et al ., , , ). At the level of morphologically recognizable taxa, many myxomycete species display cross‐continental distribution patterns (Stephenson et al ., ).…”

Section: Introductionmentioning

confidence: 99%

Biogeographical assessment of myxomycete assemblages from Neotropical and Asian Palaeotropical forests

Dagamac

Novozhilov

Stephenson

et al. 2017

Journal of Biogeography

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Aim Lowland/highland and Neotropical/Asian Palaeotropical assemblages of myxomycetes were compared to test the null hypothesis that neither species diversity nor species composition differs between the two ecoregions. This can be expected if myxomycetes behave as ubiquists and are capable of unlimited long distance dispersal. Location Four pairs (lowland/highland) of comprehensive regional surveys encompassing c. 7500 specimens were compared; these represented Neotropical (Yasuni/Maquipucuna in Ecuador; Guanacaste/Monteverde in Costa Rica) and Asian Palaeotropical forests (Cat Tien/Bi Dup Nui Ba in Vietnam; Chiang Mai in Thailand/South Luzon in the Philippines). Methods Each survey was carried out in an area characterized by relatively homogenous vegetation consisting of natural or near‐natural forests, and incorporated both field collecting and the use of moist chamber cultures, and all observed fructifications were recorded. Analyses of diversity (i.e. richness) and community composition were carried out with EstimateS and R. Results Between 400 and 2500 records per survey were obtained. Species accumulation curves indicated moderate to nearly exhaustive completeness (70–94% of expected species richness recorded). Multivariate analyses suggest that geographical separation (Neotropic versus Palaeotropic) explained the observed differences in composition of myxomycete assemblages better than habitat differences (lowland versus highland forests). Main Conclusion Both geographically restricted morphospecies and differences in myxomycete assemblages provide evidence that myxomycetes are not ubiquists but tend to follow the moderate endemicity hypothesis of protist biogeography.

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“…Fig. 7a-c Notes.-In the Neotropics it is only known from Argentina, Chile, Mexico, Panama and Peru (Lado & al. , 2014Lizárraga & al.…”

Section: Echinostelium Minutum De Barymentioning

confidence: 99%

“…2016). Notes.-In South America it was only previously known from Argentina, Brazil and Chile (Lado & al. , 2014.…”

Section: Physarum Compressummentioning

confidence: 99%

Diversity of <em>Myxomycetes</em> in arid zones of Peru part II: the cactus belt and transition zones

Lado¹,

Basanta²,

Estrada–Torres³

et al. 2019

Anal. Jard. Bot. Madr.

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The results obtained from a second survey for Myxomycetes in the arid areas of Peru are reported. A total of 37 localities from the cactus belt (‘cardonal’), between 1500 and 3000 m a.s.l., were sampled over six years. This survey is based on 601 identifiable collections of myxomycetes, developed in the field under natural conditions or those that were recovered from moist chamber cultures. In total, 84 taxa representing 19 genera were recorded. One new species, Cribraria spinispora Lado & D.Wrigley sp. nov., is described, three species new to South America and 22 additional new species for Peru are reported as well. Endemic plants, expecially cacti, had a particular relevance as myxomycete substrates. The predominance of the order Physarales T.Macbr. in arid areas is reinforced. Comments are included on some collections, as well as SEM micrographs of several species. A statistical evaluation of the diversity of myxomycetes in the cardonal area and a comparison of this area with the dry coastal desert of Peru and other Neotropical xeric environments are also included. Results show that the arid areas are rich in myxomycetes, and that each area has a unique assemblage. The differences appear to be related to the host plants.

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Myxomycete diversity of the Patagonian Steppe and bordering areas in Argentina

Cited by 14 publications

References 35 publications

Nivicolous Trichiales from the austral Andes: unexpected diversity including two new species

Nivicolous Trichiales from the austral Andes: unexpected diversity including two new species

Biogeographical assessment of myxomycete assemblages from Neotropical and Asian Palaeotropical forests

Diversity of <em>Myxomycetes</em> in arid zones of Peru part II: the cactus belt and transition zones

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