Field and moist chamber collections of Paraguay myxomycetes

McHugh, Roland

doi:10.29203/ka.2009.428

Cited by 6 publications

(4 citation statements)

References 2 publications

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“…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%

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: Resultsmentioning

confidence: 99%

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

et al. 2020

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“…For Uruguay the record is from Paysandú, "sobre estiércol de liebre (Lepus europaeus L.)" (García-Zorrón, 1977). For Ecuador there are four records (McHugh 2009) from Ayampe on Chrisophyllum (Sapotaceae) and a Malvaceae, and from a locality close to Machalilla on Armatocereus (Cactaceae). Recently, McHugh (2009), also cited Colloderma oculatum in several locations from Paraguay such as Lake Yapacarai, Boquerón, Guairá, Amambay and Alto Paraná, always on bark studied using the moist chamber culture technique.…”

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confidence: 99%

First record of the myxomycete genus Colloderma in Central America

Alvarado

Rodríguez

González

2015

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Abstract:The myxomycete genus Colloderma and the species Colloderma oculatum are reported for the first time in Central America. The species was recorded at high elevations in the Talamanca Mountain Range in Costa Rica during 2014 in a location where the structure of myxomycete assemblages has been historically associated with temperate rather than tropical communities. Comments on the geographical distribution and ecology of the species are included. This record has increased the number of Costa Rican myxomycetes to 213 according to the most updated checklist.Key words: biogeography, Mesoamerica, myxogastrids, Neotropics, slime moldsThe myxomycete genus Colloderma was described by Gulielma Lister in 1910(Lister 1910) based on specimens from Scotland and the original description of Didymium oculatum C. Lippert, from Austria. Lister (1910) recognized that those specimens did not belong into the Physaraceae and created the new genus with the combination of the species Colloderma oculatum (Lippert) G. Lister. In her description, Lister emphasized the eyelike appearance of the moist and unbroken sporangia, which inspired Lippert to use the term "oculatum" in order to describe the original specimens. In the third edition of "A monograph of the Mycetozoa" (Lister 1925) the genus Colloderma was included under the new family Collodermaceae, based on the outer gelatinous layer, but Nannenga-Bremekamp (1967) stated that an outer gelatinous wall occurs in other genera of myxomycetes, and by the structure of the capillitium, very close to Dia-

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“…The sporocarps have a yellowish persistent shiny peridium, wide collar and spores 7-8 µm in diameter. In South America, it is only known from Brazil (Cavalcanti, 2002), Ecuador (McHugh, 2005), Paraguay (McHugh, 2009) and Argentina In South America previously reported from Brazil (Cavalcanti, 2002), Paraguay (McHugh, 2009), Chile (Lado & al., 2013) and Argentina (Wrigley de Basanta & al., 2010b;Lado & al., 2014 Widely distributed throughout the Neotropics. These collections were found in the North of the country, in dunes fixed by Capparis scabrida.…”

Section: Didymium Peruvianummentioning

confidence: 99%

“…Research carried out in the Patagonian steppe registered 133 different species (Lado & al., 2014), almost the 15% of the total number of species known worldwide. These arid regions have become even more interesting because of the number of new species that have been discovered and described from them (Lado & al., 1999(Lado & al., , 2007(Lado & al., , 2013(Lado & al., , 2014Estrada-Torres & al., 2001, 2009Wrigley de Basanta & al., 2008b, 2009, 2010a, 2015. These new species represent four different orders, and the genera Cribraria, Didymium, Licea, Macbrideola, Perichaena and Physarum. Since the publication of the first records by Rudolphi (1829), only 31 species of myxomycete had been published from Peru, until a recent paper increased the number to 80 (Rojas & al., 2011), but almost all of these records were from the tropical forests of the Amazon basin, to the East of the Peruvian Andes.…”

Section: Introductionmentioning

confidence: 99%

Myxomycete diversity in the coastal desert of Peru with emphasis on the lomas formations

Lado¹,

Basanta²,

Estrada–Torres³

et al. 2016

Anal. Jard. Bot. Madr.

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Results obtained from the first survey for myxomycetes in the hyperarid areas of Peru are reported. Sampling over three consecutive years was carried out at 96 localities between 0 and 1500 m elevation. A total of 78 species from 23 genera in all 6 myxomycete orders were determined from 723 collections of myxomycetes. One new species, Didymium peruvianum, is described, 2 species new to the Neotropics, 4 new records for South America and 41 additional new species for Peru are reported, increasing the country catalogue by over 50%. Results show that arid areas are rich in myxomycetes, and that each area has a unique species assemblage. Endemic plants had a particular relevance as myxomycete substrates. The predominance of the order Physarales in arid areas is reinforced, and the ecological importance of coastal fogs (garúas) is evident from the results. Comments are included on interesting or rare collections, as are SEM micrographs of several species and statistical evaluation of the results. Se dan a conocer los resultados del primer estudio realizado sobre los Myxomycetes de las regiones hiperáridas de Perú. El muestreo, realizado en tres años consecutivos, se ha llevado a cabo en 96 localidades situadas entre 0 y 1500 m de altitud. En total se obtuvieron 723 colecciones de mixomicetes, pertenecientes a 6 órdenes, 23 géneros y 78 especies. Se describe una nueva especie, Didymium peruvianum, 2 especies se citan por primera vez en el Neotrópico, 4 son nuevos registros para América del Sur y 41 especies más son nuevos registros para Perú, con lo que el catálogo del país se incrementa en un 50%. Los resultados muestran que las zonas áridas son ricas en mixomicetes, y que cada area tiene un conjunto único de especies. Las plantas endémicas, dominantes en estos ambientes, tuvieron una relevancia especial como sustrato para los myxomycetes. Se pone de manifiesto el predominio de los representantes del órden Physarales en las zonas áridas, lo que refuerza resultados previos, así como la importancia ecológica de las nieblas costeras (garúas). Se incluyen comentarios de las especies más interesantes o poco comunes, así como fotografías realizadas con microscopio electrónico de barrido, y una evaluación estadística de los resultados.

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Field and moist chamber collections of Paraguay myxomycetes

Abstract: During June-July 2008 the author visited Paraguay with the objective of collecting myxomycetes, and substrates from which they might be cultured. This resulted in a count of 73 species, bringing the total for the country to 90 species. A new species, Physarum minutum, is described.

Cited by 6 publications

References 2 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

First record of the myxomycete genus Colloderma in Central America

Myxomycete diversity in the coastal desert of Peru with emphasis on the lomas formations

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