Results 41 to 50 of about 3,126 (190)

The Ecdysozoa: Artifact or monophylum?

open access: yesJournal of Zoological Systematics and Evolutionary Research, 2009
The molecular support for the recently postulated hypothesis ‘Ecdysozoa’ is re-examined. Some 18S rDNA-alignments clearly contain a pattern of character states that cause tree building methods to identify a clade comprised of arthropods and Cycloneuralia.
J. W. Wägele   +3 more
openaire   +1 more source

Growth and Maintenance of Wolbachia in Insect Cell Lines

open access: yesInsects, 2021
The obligate intracellular microbe, Wolbachia pipientis (Rickettsiales; Anaplasmataceae), is a Gram-negative member of the alpha proteobacteria that infects arthropods and filarial worms.
Ann M. Fallon
doaj   +1 more source

Comparative myoanatomy of Tardigrada: new insights from the heterotardigrades Actinarctus doryphorus (Tanarctidae) and Echiniscoides sigismundi (Echiniscoididae)

open access: yesBMC Evolutionary Biology, 2019
Background Tardigrada is a group of microscopic invertebrates distributed worldwide in permanent and temporal aquatic habitats. Famous for their extreme stress tolerance, tardigrades are also of interest due to their close relationship with Arthropoda ...
Dennis Krog Persson   +5 more
doaj   +1 more source

The Natural History of Teneurins: A Billion Years of Evolution in Three Key Steps

open access: yesFrontiers in Neuroscience, 2019
The entire evolutionary history of the animal gene family, Teneurin, can be summed up in three key steps, plus three salient footnotes. In a shared ancestor of all bilaterians, the first step began with gene fusions that created a protein with an amino ...
Ron Wides
doaj   +1 more source

Exploring the antimicrobial peptidome of nematodes through phylum-spanning in silico analyses highlights novel opportunities for pathogen control.

open access: yesPLoS Neglected Tropical Diseases, 2023
Antimicrobial Peptides (AMPs) are key constituents of the invertebrate innate immune system and provide critical protection against microbial threat.
Allister Irvine   +3 more
doaj   +1 more source

Morphological support for the phylogenetic positioning of Pentastomida and related fossils [PDF]

open access: yesBiotemas, 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]

open access: yesGenome 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
openaire   +2 more sources

Analysis of Schistosoma mansoni genes shared with Deuterostomia and with possible roles in host interactions

open access: yesBMC 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

Progress and Challenges in Phylogenomics and Genomics of Lophotrochozoa/Spiralia

open access: yesZoologica Scripta, Volume 55, Issue 4, Page 521-544, July 2026.
ABSTRACT Lophotrochozoa is one of the three major bilaterian groups comprising more than half of the bilaterian phyla. Lophotrochozoa includes among others Mollusca, Annelida, Platyhelminthes and Rotifera. Despite representing such a large proportion of animal diversity, they are historically understudied and genomic resources have been scarce. However,
Torsten H. Struck
wiley   +1 more source

Neuroanatomy of mud dragons: a comprehensive view of the nervous system in Echinoderes (Kinorhyncha) by confocal laser scanning microscopy

open access: yesBMC 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

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