Morphological anomalies in polychaetes: Perinereis species (Polychaeta: Annelida) examples from the Brazilian coast

Coutinho, Marina Cyrino Leal; Santos, Cinthya Simone Gomes

doi:10.24199/j.mmv.2014.71.05

Cited by 7 publications

(5 citation statements)

References 21 publications

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“…According to Ten Hove and Eliahu (2005), this state concerns a transient and very short ontogenetic state due to a guarantee of the reproduction and, therefore, the continuity of life in environments with high contamination. Previous studies reported that malformations or anomalies in polychaetes were related to exposure to pollutants and its effects at many levels: individual, specific, population, and community (Coutinho and Santos, 2014). More recent studies on samples collected elsewhere have shown that when two opercula are present, the largest operculum directly or indirectly inhibits the developmental power of the smallest, leading to a state of equilibrium (Kubal et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

Massive Aggregations of Serpulidae Associated With Eutrophication of the Mar Menor, Southeast Iberian Peninsula

et al. 2021

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For decades, inputs of nutrients and organic matter into the Mar Menor coastal lagoon have favored the change from an original oligotrophic to a eutrophic state. The lagoon reached a stage of severe eutrophication and “environmental collapse” during the spring of 2016. This paper describes the massive growth of Serpulidae (Annelida, Polychaeta) forming large aggregations and reef structures after the environmental collapse caused by the eutrophic crisis. Four species belonging to the genera Hydroides and Serpula were identified; the identified species are Hydroides elegans, Hydroides dianthus, Serpula concharum, and Serpula vermicularis. The presence of bi-operculate and tri-operculate specimens is also documented in this study.

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Section: Discussionmentioning

confidence: 99%

Massive Aggregations of Serpulidae Associated With Eutrophication of the Mar Menor, Southeast Iberian Peninsula

et al. 2021

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“…Perinereis spp. and Alitta succinea can be easily found in shallow waters (Coutinho and Santos, 2014).…”

Section: Discussionmentioning

confidence: 99%

Checklist of polychaetes (Annelida: Polychaeta) from a sandstone reef of Southeastern Brazil

Teodoro¹,

Costa²

2018

Rev. Bras. Gest. Amb. Sustent.

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A checklist of polychaetes from a neglected region of Brazil is presented. This is the first study conducted on the sandstone reef of the Urussuquara Beach in the Espírito Santo State, in Southeastern Brazil. The samplings occurred in the intertidal region by through of a quadrat of 30 cm x 30 cm. Among the 36 polychaete taxa found, the most abundant were Phragmatopoma caudata, Marphysa sanguinea, Perinereis spp., Perinereis anderssoni, and Syllidae type 1 and a zona lower intertidal presented larger abundance. Our study also contributes with new records of four polychaete genus for the Espírito Santo State, Notomastus, Hemipodus, Lysarete, Proceraea and a new species of Syllidae. We hope to promote a better understanding of the sandstone reef's biodiversity, fill the gap that exists in the Espírito Santo State and to contribute as a useful basis for the future elaboration of management and conservation plans for this environment.

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“…Michel, 1909; Stephan‐Dubois & Bautz, 1969; Ribeiro & Aguado, 2021), or supernumerary or infranumerary structures (e.g. Prentis, 1901; Herpin, 1914a; Rasmussen, 1973; Creaser & Bean, 1990; Bastida‐Zavala & ten Hove, 2002; Çinar & Ergen, 2005; Coutinho & Santos, 2014; Ribeiro et al ., 2020).…”

Section: Bifurcated Annelidsmentioning

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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Morphological anomalies in polychaetes: Perinereis species (Polychaeta: Annelida) examples from the Brazilian coast

Cited by 7 publications

References 21 publications

Massive Aggregations of Serpulidae Associated With Eutrophication of the Mar Menor, Southeast Iberian Peninsula

Massive Aggregations of Serpulidae Associated With Eutrophication of the Mar Menor, Southeast Iberian Peninsula

Checklist of polychaetes (Annelida: Polychaeta) from a sandstone reef of Southeastern Brazil

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

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