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Platyzoan paraphyly based on phylogenomic data supports a noncoelomate ancestry of spiralia.
Platyzoan paraphyly suggests that the last common ancestor of Spiralia was a simple-bodied organism lacking coelomic cavities, segmentation, and complex brain structures, and that more complex animals such as annelids evolved from such a simply organized ancestor.
CYP3 phylogenomics: evidence for positive selection of CYP3A4 and CYP3A7
CYP3A7 and CYP3A4 may have acquired catalytic functions especially important for the evolution of hominoids and humans, respectively.
The syndermatan phylogeny and the evolution of acanthocephalan endoparasitism as inferred from 18S rDNA sequences.
EST based phylogenomics of Syndermata questions monophyly of Eurotatoria
- Alexander Witek, H. Herlyn, A. Meyer, Louis A. Boell, Gregor Bucher, T. Hankeln
- BiologyBMC Evolutionary Biology
- 29 December 2008
The findings suggest that the phylogenetic position of Syndermata within Spiralia is close to Platyhelminthes, that Eurotatoria are not monophyletic and that bdelloids are more closely related to acanthocephalans than monogononts.
Support for the monophyletic origin of Gnathifera from phylogenomics.
Spiralian phylogenomics supports the resurrection of Bryozoa comprising Ectoprocta and Entoprocta.
The findings suggest that classical developmental and morphological key characters such as cleavage pattern, coelomic cavities, gut architecture, and body segmentation are subject to greater evolutionary plasticity than traditionally assumed.
Platyzoan mitochondrial genomes.
Phylogenetic analyses of endoparasitic Acanthocephala based on mitochondrial genomes suggest secondary loss of sensory organs.
Ultrastructure and function of the pharynx of Gnathostomula paradoxa (Gnathostomulida)
The monophyly of the Gnathostomulida and Gnathifera is supported, supported by the finding that extended non-contractile regions of both pharyngeal and body wall musculature form the so-called parenchymatous tissue between the digestive tract and the body wall.
SEQUENCE EVOLUTION OF THE SPERM LIGAND ZONADHESIN CORRELATES NEGATIVELY WITH BODY WEIGHT DIMORPHISM IN PRIMATES
It is speculated that the level of sperm competition is lower in more sexually dimorphic primates because males of these species monopolize access to fertile females more successfully, and variation in sperm competition may be driving the observed negative correlation of sequence evolution and sexual dimorphism in body weight.