Molecular phylogeny of siboglinid annelids (a.k.a. pogonophorans): a review

  title={Molecular phylogeny of siboglinid annelids (a.k.a. pogonophorans): a review},
  author={Kenneth M. Halanych},
Siboglinid, or pogonophoran, annelids are tubicolous worms that rely on chemoautotrophic endosymbionts for nutrition. Three clades within the siboglinids are recognized: Frenulata, Vestimentifera, and Monilifera. As a group, these worms have received considerable attention from molecular phylogenetists. Most studies have focused either on the evolutionary origins of the group or on the relationships within vestimentiferans, which live at hydrocarbon seeps and hydrothermal vents. Here I review… 

New Perspectives on the Ecology and Evolution of Siboglinid Tubeworms

The role of ecological conditions in the evolution of siboglinids is discussed and possible scenarios of the evolutionary origin of the symbiotic relationships between sibogslinids and their endosymbiotic bacteria are presented.

Taxonomy, geographical and bathymetric distribution of vestimentiferan tubeworms (Annelida, Siboglinidae)

The hypothesis on the Pacific origin on vestimentiferan tubeworms has been discussed, and the eurybathic Lamellibrachiinae and Escarpiinae penetrated into the Atlantic Ocean through shallow-water basins of the Tethys Ocean and channels in the place of Mesoamerica, while the deep-sea Tevniinae were not able to do that.

The genome of a vestimentiferan tubeworm (Ridgeia piscesae) provides insights into its adaptation to a deep-sea environment

Comparative genomic analysis revealed that that the high growth rates of vent-dwelling tubeworms might derive from small genome size, and four genes involved in cell proliferation were subject to positive selection in the genome of R. piscesae, suggesting that, besides apoptosis, cell proliferation is important for regulating growth rate in this species.

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.

Endosymbionts of Siboglinum fiordicum and the Phylogeny of Bacterial Endosymbionts in Siboglinidae (Annelida)

Phylogenetic analysis indicates that at least three major clades of endosymbiotic γ-proteobacteria associate with siboglinid annelids, with each clade corresponding to a major sibogslinid group.

The Morphology, Mitogenome, Phylogenetic Position, and Symbiotic Bacteria of a New Species of Sclerolinum (Annelida: Siboglinidae) in the South China Sea

Transmission electron microscopy, microbial 16S rRNA amplicon sequencing, phylogenetic reconstruction, and stable isotope analyses together indicate that S. annulatus n.

A new genus of frenulates (Annelida: Siboglinidae) from shallow waters of the Yenisey River estuary, Kara Sea

A new genus and a new species of frenulates Crispabrachia yenisey are described and the tube structure with prominent frills and the worm’s numerous tentacles, metameric papillae with cuticular plaques and segmental furrow on the forepart indicate that the new genus belongs to the polybrachiid group.

Siboglinid-bacteria endosymbiosis

Ad adopting a comparative approach using different siboglinid groups, such as worms harboring thiotrophic versus methanotrophic endosymbionts, may yield considerable insight into the ecology and evolution of the Sibogliidae.

The biogeography of the yeti crabs (Kiwaidae) with notes on the phylogeny of the Chirostyloidea (Decapoda: Anomura)

A nine-gene dataset across 15 chirostyloids, including all known yeti crabs (Kiwaidae), is presented to improve the resolution of phylogenetic affinities within and between the different families, and to date key divergences using fossil calibrations.

A remarkable diversity of bone-eating worms (Osedax; Siboglinidae; Annelida)

Molecular and morphological evidence for strong phylogenetic concordance across five separate genes suggests that the undescribed Osedax lineages comprise evolutionarily significant units that have been separate from one another for many millions of years.



Phylogeny of Vestimentifera (Siboglinidae, Annelida) inferred from morphology

The biogeography is consistent with the recent divergence of Vestimentifera as inferred from molecular data and Hypothesized homologies of the vestimentiferan obturaculum and vestimentum to structures in related taxa need further investigation.

Molecular Evidence that Sclerolinum brattstromi Is Closely Related to Vestimentiferans, not to Frenulate Pogonophorans (Siboglinidae, Annelida)

Evidence from the 18S nuclear rDNA gene and the 16S mitochondrial r DNA gene presented here shows that Sclerolinum is the sister clade to vestimentiferans although it lacks the characteristic morphology (i.e., a vestimentum).

A cladistic analysis of Siboglinidae Caullery , 1914 ( Polychaeta , Annelida ) : formerly the phyla Pogonophora and Vestimentifera

A cladistic study using terminals of ‘generic’ rank in the former Pogonophora (including Vestimentifera) is undertaken, and it is suggested that all taxa within Siboglinidae that are not genera or species are redundant, except for the following.

Phylogeny and Biogeography of Deep Sea Vestimentiferan Tubeworms and Their Bacterial Symbionts

The present study combines previously published morphological descriptions and molecular-based characterizations of vestimentiferans and their symbionts with new molecular data to summarize and

Molecular systematics of vestimentiferan tubeworms from hydrothermal vents and cold-water seeps

Examination of sequence divergence suggests that extant vestimentiferans constitute a recent evolutionary radiation that diversified as a paraphyletic assemblage of seep-associated taxa and then gave rise to a clade of vent-endemic taxa (genera Riftia, Oasisia, Ridgeia and Tevnia).

Molecular evolution and diversification of the vestimentiferan tube worms

This work reports the cloning of a region of 28S ribosomal DNA from representatives of five vestimentiferan genera plus, for comparison, a polychaete and a perviate pogonophore, and proposes the hypothesis that the earliest vestimentsiferan lineage to diverge gave rise to the genus Lamellibrachia only.

Absence of cospeciation in deep-sea vestimentiferan tube worms and their bacterial endosymbionts

The lack of congruence between phylogenies of host tube worms and their symbionts supports the hypothesis that the endosymbionts of tube worms are acquired de novo each generation from environmental sources.

Revision of the species of Ridgeia from northeast Pacific hydrothermal vents, with a redescription of Ridgeia piscesae Jones (Pogonophora: Obturata = Vestimentifera)

Morphological data indicate that the original distinction of two species on the basis of obturacular saucer number and tube colour was based on the extremes of a continuum of characteristics that relate to animal size, levels of predation, and probably vent fluid conditions.

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.

Siboglinid evolution shaped by habitat preference and sulfide tolerance

Trends in siboglinid evolution are most notable with regard to the level of sulfide tolerance and type of substrate and the role of the symbionts in habitat selection.