Results 31 to 40 of about 2,733 (168)
The larval nervous system of the penis worm Priapulus caudatus (Ecdysozoa) [PDF]
Philosophical Transactions of the Royal Society B: Biological Sciences, 2016 The origin and extreme diversification of the animal nervous system is a central question in biology. While most of the attention has traditionally been paid to those lineages with highly elaborated nervous systems (e.g. arthropods, vertebrates, annelids), only the study of the vast animal diversity can deliver a comprehensive view
José M. Martín-Durán +3 more
openaire +4 more sources
Morphological support for the phylogenetic positioning of Pentastomida and related fossils [PDF]
Biotemas, 2008 Pentastomida is a group of parasites that infects the respiratory tracts of vertebrates. They have a mixture of annelid and arthropod characteristics.
Elaine Christine Costa Eloy +3 more
doaj
Coelomata and Not Ecdysozoa: Evidence From Genome-Wide Phylogenetic Analysis [PDF]
Genome Research, 2004 Relative positions of nematodes, arthropods, and chordates in animal phylogeny remain uncertain. The traditional tree topology joins arthropods with chordates in a coelomate clade, whereas nematodes, which lack a coelome, occupy a basal position. However, the current leading hypothesis, based on phylogenetic trees for 18S ribosomal RNA and several ...
Yuri I, Wolf +2 more
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BMC Genomics, 2007 Background: Schistosoma mansoni is a blood helminth parasite that causes schistosomiasis, a disease that affects 200 million people in the world. Many orthologs of known mammalian genes have been discovered in this parasite and evidence is accumulating ...
Verjovski-Almeida Sergio +5 more
doaj +1 more source
The presence of α-chitin in Tardigrada with comments on chitin in the Ecdysozoa
Zoologischer Anzeiger - A Journal of Comparative Zoology, 2016 Abstract We used Fourier Transform Infrared Spectroscopy (FT-IR) to characterize for the first time chitin in the cuticle of a eutardigrade ( Macrobiotus cf. hufelandi ). Analysis of the isolated cuticles of single individuals and comparison with commercial α-chitin isolated from shrimp shell and β-chitin from squid pen revealed that the amide I ...
Greven, Hartmut +2 more
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At the Edge of Survival: Exploring the Frontiers of Tardigrade Extreme Stress Tolerance
Molecular Ecology, Volume 35, Issue 14, July 2026.ABSTRACT Tardigrades possess extraordinary resilience to extreme environmental conditions, including near‐complete desiccation, severe levels of radiation, the vacuum of space and extreme sub‐zero temperatures. Despite significant interest in their survival strategies, the molecular mechanisms underlying their survival during extreme stresses have ...
Maria Kamilari +6 more
wiley +1 more source
BMC Evolutionary Biology, 2019 Background The Scalidophora (Kinorhyncha, Loricifera and Priapulida) have an important phylogenetic position as early branching ecdysozoans, yet the architecture of their nervous organ systems is notably underinvestigated.
María Herranz +3 more
doaj +1 more source
ISME Communications, 2023 The order Holosporales (Alphaproteobacteria) encompasses obligate intracellular bacterial symbionts of diverse Eukaryotes. These bacteria have highly streamlined genomes and can have negative fitness effects on the host.
Jessica Dittmer +5 more
doaj +1 more source
Coevolution of the CDCA7-HELLS ICF-related nucleosome remodeling complex and DNA methyltransferases
eLife, 2023 5-Methylcytosine (5mC) and DNA methyltransferases (DNMTs) are broadly conserved in eukaryotes but are also frequently lost during evolution. The mammalian SNF2 family ATPase HELLS and its plant ortholog DDM1 are critical for maintaining 5mC. Mutations in
Hironori Funabiki +4 more
doaj +1 more source
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).
Philippe, Herve +2 more
openaire +3 more sources