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The clade Ecdysozoa, perplexities and questions [PDF]
Zoologischer Anzeiger, 2005 Abstract A relatively new clade, the Ecdysozoa [Aguinaldo et al., 1997. Nature 387, 489–493] was raised based on the 18S ribosomal DNA sequences that indicate a close relationship between the moulting phyla (Arthropoda, Tardigrada, Onychophora, Nematoda, Nematomorpha, Kinorhyncha, Lorificera and Priapula), from which the Annelida, with other phyla ...
Alessandro Marletta +2 more
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2022
This chapter focuses on the large protostome clade Ecdysozoa. Unlike the Spiralia, Ecdysozoa can be defined by clear morphological synapomorphies, including their three-layered cuticle that is moulted, a process regulated by ecdysteroid hormones. Ecdysozoa contains eight phyla, which are commonly organized into three subclades: Scalidophora, Nematoida,
Richard C. Brusca +2 more
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This chapter focuses on the large protostome clade Ecdysozoa. Unlike the Spiralia, Ecdysozoa can be defined by clear morphological synapomorphies, including their three-layered cuticle that is moulted, a process regulated by ecdysteroid hormones. Ecdysozoa contains eight phyla, which are commonly organized into three subclades: Scalidophora, Nematoida,
Richard C. Brusca +2 more
openaire +1 more source
Ancestral morphology of Ecdysozoa constrained by an early Cambrian stem group ecdysozoan [PDF]
BMC Evolutionary Biology, 2020 Abstract Background Ecdysozoa are the moulting protostomes, including arthropods, tardigrades, and nematodes. Both the molecular and fossil records indicate that Ecdysozoa is an ancient group originating in the terminal Proterozoic, and exceptional fossil biotas show their dominance and diversity at the beginning of the ...
Xian-Guang Hou +2 more
exaly +4 more sources
Ecdysozoa versus Articulata: clades, artifacts, prejudices
Journal of Zoological Systematics and Evolutionary Research, 2001 The claim that monophyly of the Ecdysozoa is caused by chance similarities in 18S rDNA sequences (Wagele et al., J. Zool. Syst. Evol. Res. 37, 211–223, 1999) is re-analysed from the cladistic point of view. It is shown that the molecular characters supporting the Ecdysozoa do not behave as ‘noisy’ in empirical studies that use the sensitivity analysis ...
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Ecdysozoa: The Relationship between Cycloneuralia and Panarthropoda
Zoologischer Anzeiger, 2001Abstract The hypothesis that molting protostomes such as nematodes and arthropods form a monophyletic group known as Ecdysozoa is directly opposed to Articulata, in which some segmented protostomes such as annelids and arthropods form a monophyletic taxon. Ultrastructural and cladistic studies have led to the widely accepted hypothesis that nematodes
James R Garey
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A tissue-specific marker of Ecdysozoa
Development Genes and Evolution, 2001Over the past few years, molecular studies of phylogeny have challenged the traditional view of evolutionary relationships among protostomian animal phyla. Based on analysis of 18S ribosomal RNA gene sequences, it has been suggested that some traditional groups, like the articulata and the pseudocoelomata, should be completely abandoned and that ...
A, Haase +3 more
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Russian Journal of Developmental Biology, 2015
Science has accumulated to date such amounts of valuable and diverse information that no scientists can be encyclopedists (like those of the 17th and 18th centuries). Now every scientist is usually well informed only in one particular area and often needs consultations of other specialists. The current situation in biology is similar.
openaire +2 more sources
Science has accumulated to date such amounts of valuable and diverse information that no scientists can be encyclopedists (like those of the 17th and 18th centuries). Now every scientist is usually well informed only in one particular area and often needs consultations of other specialists. The current situation in biology is similar.
openaire +2 more sources
The last common ancestor of Ecdysozoa had an adult terminal mouth
Arthropod Structure and Development, 2019The Ecdysozoa is a major animal clade whose main uniting feature is a distinctive growth strategy that requires the periodical moulting of the external cuticle. The staggering diversity within Ecdysozoa has prompted substantial efforts to reconstruct their origin and early evolution.
Javier Ortega-Hernández +2 more
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Multigene Analyses of Bilaterian Animals Corroborate the Monophyly of Ecdysozoa, Lophotrochozoa, and Protostomia [PDF]
Molecular Biology and Evolution, 2005 Almost a decade ago, a new phylogeny of bilaterian animals was inferred from small-subunit ribosomal RNA (rRNA) that claimed the monophyly of two major groups of protostome animals: Ecdysozoa (e.g., arthropods, nematodes, onychophorans, and tardigrades) and Lophotrochozoa (e.g., annelids, molluscs, platyhelminths, brachiopods, and rotifers).
Hervé Philippe, Nicolas Lartillot
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Zoology, 2003
Two conflicting hypotheses of protostome relationships, Articulata and Ecdysozoa, are reviewed by evaluating the evidence in favor and against each one of them. Understanding early embryonic development and segmentation in non-arthropod non-annelid protostomes seems crucial to the debate.
Gonzalo Giribet
exaly +3 more sources
Two conflicting hypotheses of protostome relationships, Articulata and Ecdysozoa, are reviewed by evaluating the evidence in favor and against each one of them. Understanding early embryonic development and segmentation in non-arthropod non-annelid protostomes seems crucial to the debate.
Gonzalo Giribet
exaly +3 more sources