The 18S rDNA sequences support polyphyly of the Hypsibiidae (Eutardigrada)

Kiehl, Ernst; Dastych, H.; D’Haese, Jochen; Greven, Hartmut

doi:10.4081/jlimnol.2007.s1.21

Cited by 32 publications

(32 citation statements)

References 23 publications

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“…Furthermore, the Macrobiotidae was nested within the Hypsibiidae as also shown by Jørgensen and Kristensen (2004), Kiehl et al (2007) and Sands et al (2008b). Furthermore our results suggest that the family Eohypsibiidae might be a fourth superfamily in the Parachela.…”

Section: Phylogenetic Relationshipsmentioning

confidence: 52%

“…Since the first molecular investigations of the phylogenetic position of tardigrades (Garey et al, 1996;Giribet et al, 1996;Moon and Kim, 1996) the number of investigations of the phylogenetic relationships within tardigrades is steadily increasing (Garey et al, 1999;Jørgensen and Kristensen, 2004;Regier et al, 2004;Guidetti et al, , 2009Nichols et al, 2006;Kiehl et al, 2007;Møbjerg et al, 2007;Sands et al, 2008a,b). Previous studies of a few 18S rRNA sequences from echiniscids and the arthrotardigrades Batillipes Richters, 1909 (Nichols et al, 2006) or Halechiniscus Richters, 1908 (Jørgensen andKristensen, 2004) have inferred the monophyly of Heterotardigrada.…”

Section: Introductionmentioning

confidence: 98%

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Molecular phylogeny of Arthrotardigrada (Tardigrada)

Jørgensen

Faurby

Hansen

et al. 2010

Molecular Phylogenetics and Evolution

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Section: Phylogenetic Relationshipsmentioning

confidence: 52%

Section: Introductionmentioning

confidence: 98%

Molecular phylogeny of Arthrotardigrada (Tardigrada)

Jørgensen

Faurby

Hansen

et al. 2010

Molecular Phylogenetics and Evolution

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“…Our morphological study strongly supports both orders, Apochela and Parachela, within Eutardigrada (Figs ), thus confirming previous molecular studies (Garey et al ., ; Regier et al ., ; Kiehl et al ., ; Sands et al ., ; Guidetti et al ., ; Jørgensen et al ., ; Guil & Giribet, ). However, differences in the position of Apochela, regarding its location with respect to heterotardigrades, have been found both when using highly variable genes such as COI (Guidetti et al ., ) and when including more diverse taxa and genes in analyses (Guil & Giribet, ).…”

Section: Discussionmentioning

confidence: 98%

High level of phenotypic homoplasy amongst eutardigrades (Tardigrada) based on morphological and total evidence phylogenetic analyses

2013

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Much of what is known about the phylogenetic relationships of the neglected phylum Tardigrada comes from\ud molecular data, rather than from morphology-based phylogenetic studies. Several molecular phylogenies have been\ud proposed, but morphological and total evidence phylogenetic approaches are scarce. We performed the first\ud morphological phylogeny (based on maximum parsimony and Bayesian inference) including all genera from the\ud class Eutardigrada. Furthermore, we carried out a total evidence approach adding molecular information available\ud in public databases. We compared the morphological and total evidence phylogenies with current molecular\ud hypotheses and Eutardigrada classifications, which our results partially support. These classifications were\ud supported only when homoplastic characters (related to the buccopharyngeal apparatus) were excluded. The\ud importance of morphological phylogenies is discussed as well as their utility for questioning current phylogenetic\ud hypotheses and classifications based solely on molecular information. Lastly, we propose evolutionary hypotheses\ud about eutardigrade phylogenetic relationships that should be tested based on our morphological results

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“…They have featured in high impact publications mostly due to their uncertain phylogenetic position in the tree of life [27-30], although their ubiquitous distribution makes them ideal candidates for historical biogeographic reconstruction [31-33]. Molecular phylogenetic work to date is strongly concordant with morphological based systematics [29], supporting both tardigrade monophyly and monophyly in the constituent classes Eutardigrada and Heterotardigrada [17,24,34]. …”

Section: Introductionmentioning

confidence: 99%

Assessing meiofaunal variation among individuals utilising morphological and molecular approaches: an example using the Tardigrada

et al. 2008

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Background: Meiofauna -multicellular animals captured between sieve size 45 µm and 1000 µm -are a fundamental component of terrestrial, and marine benthic ecosystems, forming an integral element of food webs, and playing a critical roll in nutrient recycling. Most phyla have meiofaunal representatives and studies of these taxa impact on a wide variety of sub-disciplines as well as having social and economic implications. However, studies of variation in meiofauna are presented with several important challenges. Isolating individuals from a sample substrate is a time consuming process, and identification requires increasingly scarce taxonomic expertise. Finding suitable morphological characters in many of these organisms is often difficult even for experts. Molecular markers are extremely useful for identifying variation in morphologically conserved organisms. However, for many species markers need to be developed de novo, while DNA can often only be extracted from pooled samples in order to obtain sufficient quantity and quality. Importantly, multiple independent markers are required to reconcile gene evolution with species evolution. In this primarily methodological paper we provide a proof of principle of a novel and effective protocol for the isolation of meiofauna from an environmental sample. We also go on to illustrate examples of the implications arising from subsequent screening for genetic variation at the level of the individual using ribosomal, mitochondrial and single copy nuclear markers.

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The 18S rDNA sequences support polyphyly of the Hypsibiidae (Eutardigrada)

Abstract: To

Cited by 32 publications

References 23 publications

Molecular phylogeny of Arthrotardigrada (Tardigrada)

Molecular phylogeny of Arthrotardigrada (Tardigrada)

High level of phenotypic homoplasy amongst eutardigrades (Tardigrada) based on morphological and total evidence phylogenetic analyses

Assessing meiofaunal variation among individuals utilising morphological and molecular approaches: an example using the Tardigrada

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