Cladistics and polychaetes

  title={Cladistics and polychaetes},
  author={G. W. Rouse and Kristian Fauchald},
  journal={Zoologica Scripta},
A series of cladistic analyses assesses the status and membership of the taxon Polychaeta. The available literature, and a review by Fauchald & Rouse (1997), on the 80 accepted families of the Polychaeta are used to develop characters and data matrices. As well as the polychaete families, non‐polychaete taxa, such as the Echiura, Euarthropoda, Onychophora, Pogonophora (as Frenulata and Vestimentifera), Clitellata, Aeolosomatidae and Potamodrilidae, are included in the analyses. All trees are… 

Systematization of the Annelida: different approaches

The main message from phylogenetic analyses of molecular data is that there is no evidence for a monophyletic Polychaeta; instead, placement of the clitellates, pogonophorans and echiurans within the polychaete clade is supported, rendering thePolychaeta paraphyletic.

4. 18s-rdna and Polychaetes

  • Biology
The paraphyly of polychaetes in regard to the Clitellata, Echiura and Siboglinidae and the monophyly of most of the traditional polychaete " families " is corroborated and the tree of Rouse and Fauchald (1997) is significantly rejected.

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.

Problems in polychaete systematics

Some of the intriguing issues in current polychaete systematics are reviewed and a preliminary cladistic analysis shows that it is entirely possible that seven other taxa recognised as families may be nested within Cirratulidae.

Polychaeta, Annelida, and Articulata are not monophyletic: articulating the Metameria (Metazoa, Coelomata)

Annelida and Polychaeta are non-monophyletic, even when including Echiura, Clitellata, and Pogonophora, and Articulata; and Owenia plus Enterocoela form a monophyletics group related to the tubicolous polychaetes.

Soil-dwelling polychaetes: enigmatic as ever? Some hints on their phylogenetic relationships as suggested by a maximum parsimony analysis of 18S rRNA gene sequences

Parergodrilus heideri and Stygocapitella subterranea Knollner, 1934 are interpreted as resulting from an ancient emergence and a rapid radiation of Polychaeta, and these polytomies are corroborated by independent evidence.

A phylogenetic and biogeographic study of Euniphysa (Eunicidae, Polychaeta)

Seven species of Euniphysa are re-described based on type material and two new species, E. quadridentata and E. filibranchia, are described, suggesting a Tethyan origin associated with the westward drift of the North American continent.

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.

A preliminary phylogenetic analysis of Poecilochaetidae (Annelida: Polychaeta) at the species level

The analysis provides strong evidence that Trochochaetidae is the sister group of PoecilochaETidae and that the latter is a well defined monophyletic group, most importantly the distribution of ampullaceous postchaetal lobes.

The position of the Arthropoda in the phylogenetic system

There are morphological characters that support Articulata, but molecular as well as morphological data advocate Ecdysozoa, and comparative morphology suggests Gastrotricha as the sister group of Ecdy sozoa with the synapomorphies.



The Polychaete Worms: Definitions and Keys to the Orders, Families and Genera

A review of the classification of the Class Polychaeta (Annelida) with comments on the characters used to identify the different included taxa has led to the recognition of seventeen orders. All taxa

The articulation of annelids

The Annelida should not be used unless relationships within the Articulata are resolved to show it is a monophyletic taxon, and the Pogonophora should revert to the original family name Lamellisabellidae Uschakov, 1933.

Point of View The rearticulation of annelids

The profound influence the choice of input taxa has on the results of a cladistic analysis is discussed, an alternative interpretation of R and F’s data is provided, and issue is taken with their conclusion regarding the monophyly of Annelida.

Phylogenetic analysis of the Amphitritinae (Polychaeta: Terebellidae)

With a robust phylogenetic hypothesis of amphitritine relationships, a re-classification of the group based on apomorphic character states can be undertaken, and questions regarding the evolution of morphological characters, reproductive modes, or biogeographical patterns can be properly addressed.

The direction of evolution within the Polychaeta

From a decision in favour of Hypothesis 2 it would follow that the Clitellata should be considered the most primitive annelid.

Revision of the aphroditoid polychaetes of the family Acoetidae Kinberg (=Polyodontidae Augener) and reestablishment of Acoetes Audouin and Milne-Edwards, 1832, and Euarche Ehlers, 1887

The family Acoetidae is reviewed and revised, based on reexamination of type material and published records, as well as on examination of new material.

A new genus and species of Dorvilleidae (Annelida, Polychaeta) from Bermuda, with a phylogenetic analysis of Dorvilleidae, Iphitimidae and Dinophilidae

A phylogenetic analysis of all apparently valid genera in the three families leads to the hypothesis that Dinophilidae and Iphitimidae represent monophyletic and paraphyletic subgroups respectively, within Dorvilleidae.

Phylogeny and classification of the Phyllodocidae (Polychaeta)

The phylogenetic relationships of the benthic phyllodocid genera are estimated by a parsimony analysis and it is concluded that the cephalization within Eteone has led to a reduction of segment 1 and loss of the first pair of tentacular cirri.

Family Revision and Cladistic Analysis of the Nereidoidea (Polychaeta : Phyllodocida)

A family revision and cladistic analysis of the superfamily Nereidoidea sensu George and Hartmann - Schroder, 1985 and three synapomorphies are proposed are proposed: anterior or, rarely, anteroventral palps; paired pharyngeal retractor muscles; and the presence of metanephromixia are proposed.

Generic revision and relationships of the family Onuphidae (Annelida: Polychaeta)

It is hypothesized that the Onuphidae have a southern centre of origin and radiated from epifaunal habitats to world-wide distributions from the shallowest to the deepest depths.