Tecamebianos (Protozoa: Rhizopoda) De Una Turbera Del Parque Nacional Puyehue (40°45' S; 72°19' W), Chile

Abstract

Thecamoebians are protozoans that inhabit a wide variety of terrestrial and freshwater habitats, including wet soils, lakes, saltmarshes, peatlands, etc. Their fossil shells can be recuperated from sediments in quantity sufficient to permit estimation of relative abundance. The objective of this study was to provide a first report on the distribution of thecamoebian fauna within a peatland located in the Puyehue National Park, Chile. This study revealed 42 taxa belonging to 9 families and 15 genera of thecamoebians. Six taxa (Arcella artocrea, Difflugia elegans, Euglypha sp. "A", Heleopera sp. "A", Hyalosphenia subflava and Nebela speciosa) have not previously been recorded from Chile. We have used an informal infraspecific nomenclature to account for the variability in shell morphology within some species (Centropyxis constricta, Centropyxis ecornis, Certesella martiali and Heleopera petricola). In the four microsites studied two groups of characteristic thecamoebian species were distinguished. The results of this study suggest that Oxygen and pH may influence the distribution of thecamoebians in the peatland.

Testate Amoeba Species- and Trait-Based Transfer Functions for Reconstruction of Hydrological Regime in Tropical Peatland of Central Sumatra, Indonesia

“…The WTD optimum for this species has only been reported from south Patagonia (15 cm), which is similar to 20 cm optimum of smaller morphotype of cf. T. microstoma morph 1 (Hoogenraad and de Groot, 1948;Bartos, 1963;Zapata et al, 2008;Bobrov et al, 2010;Krashevska et al, 2012;van Bellen et al, 2014). We suggest considering cf.…”

First evidence of testate amoebae in Lago Fagnano (54° S), Tierra del Fuego (Argentina): Proxies to reconstruct environmental changes

“…Most research on testate amoebae has focused on faunas found at higher latitudes (Scott and Medioli, 1983;Patterson et al, 1996Tolonen et al, 1992;Kliza and Schröder, 1999). In South America testate amoebae have been reported, among others, in the wetlands of central Brazil (Green, 1975), in Lake Cocococha, Peru (Haman and Kohl, 1994), in a peat from the Puyehue National Park in Chile (Zapata et al, 2008), whereas the most southern occurrence was found in the chilean Guamblin Island (Fernandez et al, 2012), located at about 45° S.…”

Checklist, diversity and distribution of testate amoebae in Chile

“…The current century has witnessed an increase in the number of studies involving testate amoebae. Several papers describing the Chilean testate amoebae fauna and ecology as well as providing new records or describ-ing new species have been published during the last years (Zapata et al 2002;Zapata 2005;Zapata et al 2007aZapata et al , 2007bZapata and Fernández 2008;De Smet and Gibson 2009;Fernández and Zapata 2011;Santiba˜nez et al 2011;Fernández et al 2012;Chatelain et al 2013;Fernández 2015).…”