Abstract:
:This paper summarises the Symposium 'Concepts in Protistology', during the VI European Congress of Protistology, Berlin, 25-29 July 2011. There is an increasing focus on cataloguing the number of species on earth, species barcoding initiatives, and the increasing need to reconcile molecular with morphological data in protists within a taxonomic framework. We identify several obstructions to defining species in protists, including the high incidence of asexuality, high levels of both morphological conservation and evolutionary convergence, high levels of genetic diversity that cannot so far be correlated with phenotypic characters, conflicting signals between both genetic and phenotypic taxonomic markers, and different requirements and challenges of species definition in different protist groups. We assert that there is no species 'category' for protists, and recommend that a working definition of species is clarified on a case-by-case basis. Thus, a consensus approach may emerge within protist groups, but any one approach is unlikely to encompass a wide phylogenetic range. However, as long as clarity of intent and method is maintained, the utility of the term 'species' in protists will also be maintained as a reproducible and convenient (if artificial) way of referring to particular lineages within a tightly defined context.
journal_name
Eur J Protistoljournal_title
European journal of protistologyauthors
Boenigk J,Ereshefsky M,Hoef-Emden K,Mallet J,Bass Ddoi
10.1016/j.ejop.2011.11.004subject
Has Abstractpub_date
2012-05-01 00:00:00pages
96-102issue
2eissn
0932-4739issn
1618-0429pii
S0932-4739(11)00082-4journal_volume
48pub_type
abstract::A new ciliate species (Cyclidium porcatum) is the first freshwater anaerobic scuticociliate to be cultured and described. It contains a unique tripartite structure consisting of hydrogenosomes (confirmed by cytochemical staining for hydrogenase), interspersed with methanogens (confirmed by auto fluorescence and in sit...
journal_title:European journal of protistology
pub_type: 杂志文章
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abstract::Differences in gel electrophoretic mobility were used to compare tubulin subunits from a variety of distantly related ciliate species. The relative electrophoretic mobility of ciliate tubulins is shown to vary depending upon the electrophoretic conditions used to separate them. Tubulin migration is altered by changing...
journal_title:European journal of protistology
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abstract::The free-living ciliates of the order Metopida Jankowski, 1980 are pivotal players in the microbial food web of the sulfuretum, acting as hosts to prokaryotic endo- and ectosymbionts. They are also of interest in the study of the function and evolution of their mitochondrion-related organelle, the hydrogenosome. The t...
journal_title:European journal of protistology
pub_type: 杂志文章
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journal_title:European journal of protistology
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journal_title:European journal of protistology
pub_type: 杂志文章,评审
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journal_title:European journal of protistology
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abstract::Acanthamoebae feed on bacteria but are also frequent hosts of bacterial symbionts. Here, we describe the stable co-occurrence of two symbionts, one affiliated to the genus Parachlamydia and the other to the candidate genus Paracaedibacter (Alphaproteobacteria), within a clinical isolate of Acanthamoeba hatchetti genot...
journal_title:European journal of protistology
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journal_title:European journal of protistology
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journal_title:European journal of protistology
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journal_title:European journal of protistology
pub_type: 杂志文章
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journal_title:European journal of protistology
pub_type: 杂志文章
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journal_title:European journal of protistology
pub_type: 杂志文章
doi:10.1016/j.ejop.2007.11.002
更新日期:2008-05-01 00:00:00
abstract::Since its description 35 years ago from Quebec, Canada, the poorly known monospecific testate rhizopod genus Puytoracia (type species, Puytoracia bergeri) has been reported only from the Himalayan region of Nepal. This species was recently found at 13 locations in Ontario, Canada, and the range of form variation of th...
journal_title:European journal of protistology
pub_type: 杂志文章
doi:10.1016/j.ejop.2006.04.002
更新日期:2006-09-01 00:00:00
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journal_title:European journal of protistology
pub_type: 杂志文章
doi:10.1016/j.ejop.2006.10.002
更新日期:2007-06-01 00:00:00
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journal_title:European journal of protistology
pub_type: 杂志文章
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更新日期:2018-10-01 00:00:00
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journal_title:European journal of protistology
pub_type: 杂志文章
doi:10.1016/j.ejop.2009.10.002
更新日期:2010-01-01 00:00:00
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journal_title:European journal of protistology
pub_type: 杂志文章
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更新日期:2014-02-01 00:00:00
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journal_title:European journal of protistology
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journal_title:European journal of protistology
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pub_type: 杂志文章
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journal_title:European journal of protistology
pub_type: 杂志文章
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journal_title:European journal of protistology
pub_type: 杂志文章
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pub_type: 杂志文章
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journal_title:European journal of protistology
pub_type: 杂志文章
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journal_title:European journal of protistology
pub_type: 杂志文章
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pub_type: 杂志文章
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journal_title:European journal of protistology
pub_type: 杂志文章
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journal_title:European journal of protistology
pub_type: 杂志文章
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journal_title:European journal of protistology
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abstract::Ookinetes of Leucocytozoon simondi have a Polar Ring Complex (PRC) which is composed of a stout electron-lucent polar ring with about 34 posteriorly extending tines. The latter are subtended by about 76 subpellicular microtubules. A broad collar of electron-dense material is associated with the cytoplasmic surface of ...
journal_title:European journal of protistology
pub_type: 杂志文章
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