A new species of Syllis Grube, 1850 including transcriptomic data and an updated phylogeny of Syllinae (Annelida: Syllidae)

Ribeiro, Rannyele Passos; Ponz‐Segrelles, Guillermo; Helm, Conrad; Egger, Bernhard; Aguado, M. Teresa

doi:10.1007/s12526-020-01046-y

Cited by 15 publications

(14 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Almost in parallel: (1) the existence of a 'ribbon-clade lineage, which includes Ramisyllis Glasby, Schroeder & Aguado, 2012 [499] and the flattened body syllids was proposed [492], and (2) Typosyllis and the previous division of the large genus Syllis in subgenera were proposed as non-valid [502]. Lastly, the monophyly of the family was supported based on all available sequences and markers, although subdivided in two different lineages: the ribbon-clade (clade A) and clade B (including Syllis as paraphyletic genus) [500]. Accordingly, all hypotheses on the monophyly of the main groups within Syllidae (i.e., the five subfamilies and the main lineages within them) are highly congruent.…”

Section: Syllidaementioning

confidence: 92%

“…Accordingly, all hypotheses on the monophyly of the main groups within Syllidae (i.e., the five subfamilies and the main lineages within them) are highly congruent. This stable phylogenetic scenario allowed to trace the evolution of biological processes such as the reproductive modes and a large variety of regenerative abilities [500,[503][504][505].…”

Section: Syllidaementioning

confidence: 99%

Section: Syllidaementioning

confidence: 99%

“…Syllidae is a complex family including large genera, such as Syllis [502,506] that is currently considered paraphyletic [500], together with very small taxa, with only few known species, or even only one [507,508]. The family includes species with a large diversity of morphologies (Figures 24a-e and 25a-c), from meiofaunal organisms with few chaetigers and less than 1 mm like in Neopetita San Martín, 2003 [479] and Erinaceusyllis San Martín, 2003 [479], to relatively large animals like in Trypanosyllis Claparède, 1864 [509], which may reach impressive lengths of 15 cm and hundreds of segments, or the even longer Syllis ramosa McIntosh, 1879 [510] and Ramisyllis multicaudata Glasby, Schroeder and Aguado, 2012 [499], which also show an unusual branched body pattern (Figure 25b,c).…”

Section: Syllidaementioning

confidence: 99%

“…(c) Ramisyllis multicaudata, mid-posterior body showing terminal branches and developing female stolon, after [499]. (d) The anterior end of Syllis malaquini, Ribeiro, Ponz-Segrelles, Helm, Egger & Aguado, 2020; photo by R. P Ribeiro in[500]; an: antenna, ey: eye, dc: dorsal cirrus, pa: parapodia, ph: pharynx, pl: palp, pr: proventricle, py: pygidium, tc: tentacular cirri.…”

mentioning

confidence: 99%

See 4 more Smart Citations

On the Diversity of Phyllodocida (Annelida: Errantia), with a Focus on Glyceridae, Goniadidae, Nephtyidae, Polynoidae, Sphaerodoridae, Syllidae, and the Holoplanktonic Families

et al. 2021

Self Cite

View full text Add to dashboard Cite

Phyllodocida is a clade of errantiate annelids characterized by having ventral sensory palps, anterior enlarged cirri, axial muscular proboscis, compound chaetae (if present) with a single ligament, and of lacking dorsolateral folds. Members of most families date back to the Carboniferous, although the earliest fossil was dated from the Devonian. Phyllodocida holds 27 well-established and morphologically homogenous clades ranked as families, gathering more than 4600 currently accepted nominal species. Among them, Syllidae and Polynoidae are the most specious polychaete groups. Species of Phyllodocida are mainly found in the marine benthos, although a few inhabit freshwater, terrestrial and planktonic environments, and occur from intertidal to deep waters in all oceans. In this review, we (1) explore the current knowledge on species diversity trends (based on traditional species concept and molecular data), phylogeny, ecology, and geographic distribution for the whole group, (2) try to identify the main knowledge gaps, and (3) focus on selected families: Alciopidae, Goniadidae, Glyceridae, Iospilidae, Lopadorrhynchidae, Polynoidae, Pontodoridae, Nephtyidae, Sphaerodoridae, Syllidae, Tomopteridae, Typhloscolecidae, and Yndolaciidae. The highest species richness is concentrated in European, North American, and Australian continental shelves (reflecting a strong sampling bias). While most data come from shallow coastal and surface environments most world oceans are clearly under-studied. The overall trends indicate that new descriptions are constantly added through time and that less than 10% of the known species have molecular barcode information available.

show abstract

Section: Syllidaementioning

confidence: 92%

Section: Syllidaementioning

confidence: 99%

Section: Syllidaementioning

confidence: 99%

Section: Syllidaementioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

On the Diversity of Phyllodocida (Annelida: Errantia), with a Focus on Glyceridae, Goniadidae, Nephtyidae, Polynoidae, Sphaerodoridae, Syllidae, and the Holoplanktonic Families

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

Annelids as models of germ cell and gonad regeneration

Özpolat

2023

J Exp Zool Pt B

View full text Add to dashboard Cite

Germ cells (reproductive cells and their progenitors) give rise to the next generation in sexually reproducing organisms. The loss or removal of germ cells often leads to sterility in established research organisms such as the fruit fly, nematodes, frog, and mouse. The failure to regenerate germ cells in these organisms reinforced the dogma of germline–soma barrier in which germ cells are set‐aside during embryogenesis and cannot be replaced by somatic cells. However, in stark contrast, many animals including segmented worms (annelids), hydrozoans, planaria, sea stars, sea urchins, and tunicates can regenerate germ cells. Here I review germ cell and gonad regeneration in annelids, a rich history of research that dates back to the early 20th century in this highly regenerative group. Examples include annelids from across the annelid phylogeny, across developmental stages, and reproductive strategies. Adult annelids regenerate germ cells as a part of regeneration, grafting, and asexual reproduction. Annelids can also recover germ cells after ablation of germ cell progenitors in the embryos. I present a framework to investigate cellular sources of germ cell regeneration in annelids, and discuss the literature that supports different possibilities within this framework, where germ–soma separation may or may not be preserved. With contemporary genetic‐lineage tracing and bioinformatics tools, and several genetically enabled annelid models, we are at the brink of answering the big questions that puzzled many for over more than a century.

show abstract

Integrative anatomical study of the branched annelid Ramisyllis multicaudata (Annelida, Syllidae)

Ponz‐Segrelles

Glasby²,

Helm

et al. 2021

Journal of Morphology

Self Cite

View full text Add to dashboard Cite

The sponge‐dwelling Syllidae Ramisyllis multicaudata and Syllis ramosa are the only annelid species for which a branched body with one head and multiple posterior ends is known. In these species, the head is located deep within the sponge, and the branches extend through the canal system of their host. The morphology of these creatures has captivated annelid biologists since they were first discovered in the late XIXth century, and their external characteristics have been well documented. However, how their branched bodies fit within their symbiotic host sponges and how branches translate into internal anatomy has not been documented before. These features are crucially relevant for understanding the body of these animals, and therefore, the aim of this study was to investigate these aspects. In order to assess these questions, live observation, as wells as histology, immunohistochemistry, micro‐computed tomography, and transmission electron microscopy techniques were used on specimens of R. multicaudata. By using these techniques, we show that the complex body of R. multicaudata specimens extends greatly through the canal system of their host sponges. We demonstrate that iterative external bifurcation of the body is accompanied by the bifurcation of the longitudinal organ systems that are characteristic of annelids. Additionally, we also highlight that the bifurcation process leaves an unmistakable fingerprint in the form of newly‐described “muscle bridges.” These structures theoretically allow one to distinguish original and derived branches at each bifurcation. Last, we characterize some of the internal anatomical features of the stolons (reproductive units) of R. multicaudata, particularly their nervous system. Here, we provide the first study of the internal anatomy of a branched annelid. This information is not only crucial to deepen our understanding of these animals and their biology, but it will also be key to inform future studies that try to explain how this morphology evolved.

show abstract

A new species of Syllis Grube, 1850 including transcriptomic data and an updated phylogeny of Syllinae (Annelida: Syllidae)

Cited by 15 publications

References 51 publications

On the Diversity of Phyllodocida (Annelida: Errantia), with a Focus on Glyceridae, Goniadidae, Nephtyidae, Polynoidae, Sphaerodoridae, Syllidae, and the Holoplanktonic Families

On the Diversity of Phyllodocida (Annelida: Errantia), with a Focus on Glyceridae, Goniadidae, Nephtyidae, Polynoidae, Sphaerodoridae, Syllidae, and the Holoplanktonic Families

Annelids as models of germ cell and gonad regeneration

Integrative anatomical study of the branched annelid Ramisyllis multicaudata (Annelida, Syllidae)

Contact Info

Product

Resources

About