Current status of annelid phylogeny

  title={Current status of annelid phylogeny},
  author={Anne Weigert and Christoph Bleidorn},
  journal={Organisms Diversity \& Evolution},
Annelida is an ecologically and morphologically diverse phylum within the Lophotrochozoa whose members occupy a wide range of environments and show diverse life styles. [] Key Result Six taxa branch as a basal grade outside of this major radiation: Oweniidae, Magelonidae, Chaetopteridae, Sipuncula, Amphinomida, and Lobatocerebrum. Oweniidae and Magelonidae form a monophyletic group which we name Palaeoannelida, which constitutes the sister taxon of the remaining annelids. The early splits of annelid…

Annelid Diversity: Historical Overview and Future Perspectives

This review aims at succinctly reviewing the state-of-the-art of annelid diversity and summarizing the main systematic revisions carried out in the group, among the species most rich in phyla within Metazoa.

A Cambrian crown annelid reconciles phylogenomics and the fossil record

Dannychaeta tucolus is a new fossil polychaete (bristle worm) from the early Cambrian Canglangpu formation that belongs to crown annelids, and has characters that provide evidence of ecological and morphological diversity in ancient annelid evolution, thus reconciling the fossil record with molecular phylogenetic analyses.

Extensive gene rearrangements in the mitogenomes of congeneric annelid species and insights on the evolutionary history of the genus Ophryotrocha

Background Annelids are one the most speciose and ecologically diverse groups of metazoans. Although a significant effort has been recently invested in sequencing genomes of a wide array of

Sclerite-bearing annelids from the lower Cambrian of South China

Two new annelids from the Lower Cambrian Chengjiang Lagerstätte, South China are reported - Adelochaeta sinensis n.

The role of progenesis in the diversification of the interstitial annelid lineage Psammodrilidae

A combined phylogeny of Psammodrilidae is presented including molecular and morphological data of all eight described species as well as four undescribed species to reveal an unexpected diversity and distribution of this small family.

Complete mitochondrial genome of the ragworm annelid Hediste diversicolor (of Müller, 1776) (Annelida: Nereididae)

The first complete mitogenome of the Atlantic ragworm Hediste diversicolor is presented and the phylogenetic analysis using both maximum-likelihood and Bayesian inference methods reveal a well-supported monophyly of genus Hediste and the already reported paraphyletic relationships within the subfamilies Nereidinee and Gymnonereidinae.

Phylogeny and systematics of Aphroditiformia

Aphroditiformia represents one of the most successful radiations of annelids, and is therefore an interesting model to understand morphological and functional evolution and is addressed through the analysis of four molecular markers and 87 morphological characters sampled across 127 species under the assumptions of parsimony and model‐based methods.



Evolution of mitochondrial gene order in Annelida.

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.

Phylogeny of Annelida (Lophotrochozoa): total-evidence analysis of morphology and six genes

The combined ("total-evidence") phylogenetic analysis provides a modified view of annelid evolution, with several higher-level taxa, i.e. the monophyly of the Aciculata, sister-group relationships between the Eunicida and OPC, between the Cirratuliformia and SSC, and possibly also between the "Clitellatomorpha" and Oweniidae-Pogonophora clades.

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.

The origin of annelids

A novel clade of machaeridians, the Cuniculepadida, is identified, which exhibit a series of adaptations for burrowing, and is identified as a convincing body of molecular evidence that polychaetes form a paraphyletic grade and that clitellates are derived polychaETes.

New insights into polychaete phylogeny (Annelida) inferred from 18S rDNA sequences.

Systematics, evolution and phylogeny of Annelida – a morphological perspective

Attempts to understand the major transitions in annelid evolution are reviewed and discussed in the light of new morphological evidence such as photoreceptor cell and eye evolution as well as the evolution of the nervous system and musculature.

Phylogenetic relationships of annelids, molluscs, and arthropods evidenced from molecules and morphology

The result supports the Eutrochozoa hypothesis and the monophyly of molluscs, and indicates early acquisition of segmented body plans in arthropods.

Phylogeny of Oweniidae (Polychaeta) based on morphological data and taxonomic revision of Australian fauna

Phylogenetic hypotheses confirmed the monophyly of Oweniidae and suggested sister-group relationships with Magelonidae, although weakly supported and recognised Myrioglobula as a junior synonym of Myriochele based on the presence of acicular chaetae and the shape of the head.

Unsegmented Annelids? Possible Origins of Four Lophotrochozoan Worm Taxa1

Abundant molecular, developmental, and morphological data show that the Siboglinidae, which includes the formerly recognized Pogonophora and Vestimentifera, are derived annelids; recent data from the Elongation Factor-1α gene also suggest that echiurids are of annelid ancestry.