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Annelid phylogeny and the status of Sipuncula and Echiura
Using multiple genes and explicit hypothesis testing, it is shown that Echiura, Siboglinidae, and Clitellata are derived annelid with polychaete sister taxa, and that Sipuncula should be included within annelids.
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.
Phylogenomic analyses unravel annelid evolution
It is shown that phylogenomic analyses of 34 annelid taxa, using 47,953 amino acid positions, recovered a well-supported phylogeny with strong support for major splits and Ancestral character trait reconstructions indicate that these clades show adaptation to either an errant or a sedentary lifestyle.
Illuminating the base of the annelid tree using transcriptomics.
This study based on transcriptomic data comprising 68,750-170,497 amino acid sites from 305 to 622 proteins resolves annelid relationships, including Chaetopteridae, Amphinomidae, Sipuncula, Oweniidae, and Magelonidae in the basal part of the tree.
phylogenetic analyses as
- C. Bleidorn
The phylogenetic reconstruction strongly supported Olpidium as the closest zoosporic relative of the non-flagellated terrestrial fungi, and genome scale data supported the delineation of Mucoromycota and ZoopagomyCota, but the branching order of their respective subphyla remains unclear.
New insights into polychaete phylogeny (Annelida) inferred from 18S rDNA sequences.
Current status of annelid phylogeny
The new annelids phylogeny highlights the variability and lability of annelid body plans, and many instances of simplifications of body plan as adaptations to new life styles can be found.
The Evolution of Annelids Reveals Two Adaptive Routes to the Interstitial Realm
Evolution of mitochondrial gene order in Annelida.
A contribution to sedentary polychaete phylogeny using 18S rRNA sequence data
It is suggested that an increase in taxon sampling may yield additional resolution in the reconstruction of polychaete ingroup phylogeny, although the difficulties in reconstructing the basal phylogenetic relationships within Annelida may be due to their rapid radiation.