Sex-specific gene expression differences in reproducing Syllis prolifera and Nudisyllis pulligera (Annelida, Syllidae)

Ponz‐Segrelles, Guillermo; Ribeiro, Rannyele Passos; Bleidorn, Christoph; Aguado, M. Teresa

doi:10.1016/j.margen.2020.100772

Cited by 4 publications

(7 citation statements)

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“…This may be regulated by hormones from the prostomium and/or proventricle, as suggested by classical experiments of removal and transplantation in some syllid species (Franke, 1980;Heacox and Schroeder, 1982). Based on the results of transcriptomic analysis, it has recently been proposed that different hormones are involved in sexual maturation and stolon formation in different sexes in S. magdalena (Álvarez-Campos et al, 2019;Ponz-Segrelles et al, 2020). Understanding the mechanism of sexual differentiation is thus important for a comprehensive understanding of the molecular mechanism of stolon formation.…”

Section: Sex Determinationmentioning

confidence: 99%

“…Understanding the mechanism of sexual differentiation is thus important for a comprehensive understanding of the molecular mechanism of stolon formation. In some syllid species, gene expression was compared between sexually differentiated individuals (Álvarez- Campos et al, 2019;Ponz-Segrelles et al, 2020). However, gene expression and functional analyses for individuals during sex differentiation have not yet been undertaken.…”

Section: Sex Determinationmentioning

confidence: 99%

“…The striking change in morphology, behavior and physiology as a consequence of reproductive maturation is called epitoky, which can be broadly divided into two categories: epigamy and schizogamy. In epigamy, the entire worm body transforms into a reproductive morph, usually with enlarged sensory organs, and developed gonads, gametes and swimming apparatus (Wissocq, 1970a(Wissocq, , 1970bPonz-Segrelles et al, 2020). In schizogamy, only a part of the worm body develops into an epitokous reproductive morph.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Construction of a massive genetic resource by transcriptome sequencing and genetic characterization of <i>Megasyllis nipponica</i> (Annelida: Syllidae)

et al. 2022

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Section: Sex Determinationmentioning

confidence: 99%

Section: Sex Determinationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Construction of a massive genetic resource by transcriptome sequencing and genetic characterization of <i>Megasyllis nipponica</i> (Annelida: Syllidae)

et al. 2022

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“…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%

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

et al. 2021

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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.

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“…The evolutionary aspect of the study of development is gaining popularity within the annelid research community (e.g. Balavoine, 2014; Seaver, 2014; Bleidorn et al ., 2015; Kostyuchenko et al ., 2016; Özpolat & Bely, 2016; Kuo, 2017; Ribeiro et al ., 2019; Ponz‐Segrelles et al ., 2020). However, contrasting with EvoDevo studies in other organisms (e.g.…”

Section: Anomalous Annelids and Evodevomentioning

confidence: 99%

Monsters reveal patterns: bifurcated annelids and their implications for the study of development and evolution

2021

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During recent decades, the study of anatomical anomalies has been of great relevance for research on development and its evolution. Yet most animal groups have never been studied under this perspective. In annelids, one of the most common and remarkable anomalies is anteroposterior axis bifurcation, that is animals that have two or more heads and/or tails. Bifurcated annelids were first described in the 18th century and have been occasionally reported since then. However, these animals have rarely been considered other than curiosities, one‐off anomalies, or monsters, and a condensed but comprehensive analysis of this phenomenon is lacking. Such an analysis of the existing knowledge is necessary for addressing the different patterns of annelid bifurcation, as well as to understand possible developmental mechanisms behind them and their evolution. In this review we summarize reports of annelid bifurcation published during the last 275 years and the wide variety of anatomies they present. Our survey reveals bifurcation as a widespread phenomenon found all over the annelid tree. Moreover, it also shows that bifurcations can be classified into different types according to anatomy (lateral versus dorsoventral) or developmental origin (embryonic versus postembryonic, the latter occurring in relation to regeneration, reproduction, or growth). Regarding embryos, three different types of bifurcation can be found: conjoined twins (in clitellates); Janus embryos (two posterior ends with a single head which shows duplicated structures); and duplicitas cruciata embryos (with anterior and posterior bifurcation with a 90° rotation). In adults, we show that while lateral bifurcation can result in well‐integrated phenotypes, dorsoventral bifurcation cannot since it requires the discontinuity of at least some internal organs. The relevance of this distinction is highlighted in the case of the Ribbon Clade, a group of syllid annelids in which some species reproduce by collateral and successive gemmiparity (which involves dorsoventral bifurcation), while others grow by branching laterally. Although most known cases of bifurcation came from accidental findings in the wild or were unintentionally produced, experimental studies resulting in the induction of bifurcation of both embryos and adults are also reviewed. In embryos, these experimental studies show how mechanical or chemical disruption of the zygote can result in bifurcation. In adults, the ventral nervous system and the digestive tract seem to play a role in the induction of bifurcation. Based on the reviewed evidence, we argue that the long‐forgotten study of annelid developmental anomalies should be incorporated into the growing field of annelid EvoDevo and examined with modern techniques and perspectives.

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Sex-specific gene expression differences in reproducing Syllis prolifera and Nudisyllis pulligera (Annelida, Syllidae)

Cited by 4 publications

References 68 publications

Construction of a massive genetic resource by transcriptome sequencing and genetic characterization of <i>Megasyllis nipponica</i> (Annelida: Syllidae)

Construction of a massive genetic resource by transcriptome sequencing and genetic characterization of <i>Megasyllis nipponica</i> (Annelida: Syllidae)

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

Monsters reveal patterns: bifurcated annelids and their implications for the study of development and evolution

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