Taxonomic Confusion Blurs the Debate on Cosmopolitanism versus Local Endemism of Free-Living Protists

Mitchell, Edward A. D.; Meisterfeld, Ralf

doi:10.1016/j.protis.2005.07.001

Cited by 75 publications

(51 citation statements)

References 18 publications

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“…It should be noted that A. vas is one of the ''flagship species'' of microorganisms with a limited distribution while N. lageniformis is considered to be cosmopolitain (Mitchell and Meisterfeld 2005). The two taxa differ only in 3% in the portion of the SSU rRNA gene examined here but they nevertheless are certainly different from each other both from the genetic and the morphological points of view.…”

Section: Phylogenetic Position Of the Studied Speciesmentioning

confidence: 71%

“…Several species have been claimed to have a limited geographic distribution, the most famous case being certainly Apodera vas (Deflandre 1936;Van Oye 1944). This and other species of the Apodera genus have not been recorded in the extra-tropical northern Hemisphere where most studies on the ecology and taxonomy of testate amoebae took place (Mitchell and Meisterfeld 2005). Members of the family Hyalospheniidae sensu Schultze 1877 are characterized by an ovoid or pyriform shell, which is laterally compressed.…”

Section: Introductionmentioning

confidence: 97%

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Ribosomal RNA Genes Challenge the Monophyly of the Hyalospheniidae (Amoebozoa: Arcellinida)

Lara

Heger

Ekelund

et al. 2008

Protist

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To date only five partial and two complete SSU rRNA gene sequences are available for the lobose testate amoebae (Arcellinida). Consequently, the phylogenetic relationships among taxa and the definition of species are still largely dependant on morphological characters of uncertain value, which causes confusion in the phylogeny, taxonomy and the debate on cosmopolitanism of free-living protists. Here we present a SSU rRNA-based phylogeny of the Hyalospheniidae including the most common species. Similar to the filose testate amoebae of the order Euglyphida the most basal clades have a terminal aperture; the ventral position of the pseudostome appears to be a derived character. Family Hyalospheniidae appears paraphyletic and is separated into three clades: (1) Heleopera sphagni, (2) Heleopera rosea and Argynnia dentistoma and (3) the rest of the species from genera Apodera, Hyalosphenia, Porosia and Nebela. Our data support the validity of morphological characters used to define species among the Hyalospheniidae and even suggest that taxa described as varieties may deserve the rank of species (e.g. N. penardiana var. minor). Finally our results suggest that the genera Hyalosphenia and Nebela are paraphyletic, and that Porosia bigibbosa branches inside the main Nebela clade.

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Section: Phylogenetic Position Of the Studied Speciesmentioning

confidence: 71%

Section: Introductionmentioning

confidence: 97%

Ribosomal RNA Genes Challenge the Monophyly of the Hyalospheniidae (Amoebozoa: Arcellinida)

Lara

Heger

Ekelund

et al. 2008

Protist

Self Cite

View full text Add to dashboard Cite

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“…However, there is also abundant cellular material in the atmosphere, including pollen, spores, bacteria, algae (including marine plankton), fungi and viruses ranging in size from tens of nanometres to millimetres (Jaenicke 2005; see also Wilkinson 2001 figure 3), a variety of aerial and marine microbes should have similar dispersal abilities, realized dispersal distances and gene flow and geographical ranges (figures 5 and 6). Evidence on dispersal and biogeographic patterns in aerial and marine microbes is somewhat sparse, due in part to limited geographical sampling of typically widely distributed taxa and the varied import given to DNA analyses versus phenotypes in inferences of species entities (Dolan 2005;Fenchel 2005;Mitchell & Meisterfeld 2005;Esteban et al 2007). The initial picture is that marine bacterioplankton are very widely dispersed but not ubiquitous.…”

Section: Comparing Marine and Terrestrial Organisms In Physically Simmentioning

confidence: 99%

A biophysical perspective on dispersal and the geography of evolution in marine and terrestrial systems

Dawson

Hamner

2007

J. R. Soc. Interface.

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The fluid mechanics of marine and terrestrial systems are surprisingly similar at many spatial and temporal scales. Not surprisingly, the dispersal of organisms that float, swim or fly is influenced by the fluid environments of air and seawater. Nonetheless, it has been argued repeatedly that the geography of evolution differs fundamentally between marine and terrestrial taxa. Might this view emanate from qualitative contrasts between the pelagic ocean and terrestrial land conflated by anthropocentric perception of within-and betweenrealm variation? We draw on recent advances in biogeography to identify two pairs of biophysically similar marine and terrestrial settings-(i) aerial and marine microplankton and (ii) true islands and brackish seawater lakes-which have similar geographies of evolution. Commonalities at these scales, the largest and smallest biogeographic scales, delimit the geographical extents that can possibly characterize evolution in the remaining majority of species. The geographies of evolution therefore differ statistically, not fundamentally, between marine and terrestrial systems. Comparing the geography of evolution in diverse non-microplanktonic and non-island species from a biophysical perspective is an essential next step for quantifying precisely how marine and terrestrial systems differ and is an important yet under-explored avenue of macroecology.

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“…It has also been reported from certain locations in the Northern hemisphere including Sumatra (Hoogenraad and Groot 1940), Nepal (Bonnet 1977), West Africa (Golemansky 1963;Bonnet 1978) and Central America (Laminger 1973a). However, it has never been found north of the tropical desert belt, despite the numerous studies undertaken in the Northern hemisphere (Mitchell and Meisterfeld 2005). This absence is even more remarkable in that A. vas is a very frequent species within its geographical range.…”

Section: Cosmopolitanism Versus Global Endemism In the Hyalospheniidaementioning

confidence: 96%

Diversity and biogeography of testate amoebae

Smith

Bobrov

Lara

2007

Topics in Biodiversity and Conservation

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Taxonomic Confusion Blurs the Debate on Cosmopolitanism versus Local Endemism of Free-Living Protists

Cited by 75 publications

References 18 publications

Ribosomal RNA Genes Challenge the Monophyly of the Hyalospheniidae (Amoebozoa: Arcellinida)

Ribosomal RNA Genes Challenge the Monophyly of the Hyalospheniidae (Amoebozoa: Arcellinida)

A biophysical perspective on dispersal and the geography of evolution in marine and terrestrial systems

Diversity and biogeography of testate amoebae

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