ArticleJournal of experimental zoology. Part B, Molecular and developmental evolution2011
Cellular and muscular growth patterns during sipunculan development.
Article in Journal of experimental zoology. Part B, Molecular and developmental evolution, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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Who cites it
11 citing papers in PubMed, 30 citations in OpenAlex.
- Article
- Myogenesis of Siboglinum fiordicum sheds light on body regionalisation in beard worms (Siboglinidae, Annelida).Frontiers in zoology · 2021Article
- Muscular Development inInternational journal of molecular sciences · 2020Article
- Cell Proliferation Pattern and Twist Expression in an Aplacophoran Mollusk Argue Against Segmented Ancestry of Mollusca.Journal of experimental zoology. Part B, Molecular and developmental evolution · 2016Article
- From complex to simple: myogenesis in an aplacophoran mollusk reveals key traits in aculiferan evolution.BMC evolutionary biology · 2015Article
- Did the notochord evolve from an ancient axial muscle? The axochord hypothesis.BioEssays : news and reviews in molecular, cellular and developmental biology · 2015Review
- Muscular anatomy of an entoproct creeping-type larva reveals extraordinary high complexity and potential shared characters with mollusks.BMC evolutionary biology · 2015Article
- Development and organization of the larval nervous system in Phoronopsis harmeri: new insights into phoronid phylogeny.Frontiers in zoology · 2014Article
- Development of the nervous system in Solenogastres (Mollusca) reveals putative ancestral spiralian features.EvoDevo · 2014Article
- Posterior regeneration in Isodiametra pulchra (Acoela, Acoelomorpha).Frontiers in zoology · 2013Article
- Spiral cleavage and early embryology of a loxosomatid entoproct and the usefulness of spiralian apical cross patterns for phylogenetic inferences.BMC developmental biology · 2012Article
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Authors and funding
4 authors at 2 institutions in 2 countries.
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Abstract
Sipuncula is a lophotrochozoan taxon with annelid affinities, albeit lacking segmentation of the adult body. Here, we present data on cell proliferation and myogenesis during development of three sipunculan species, Phascolosoma agassizii, Thysanocardia nigra, and Themiste pyroides. The first anlagen of the circular body wall muscles appear simultaneously and not subsequently as in the annelids. At the same time, the rudiments of four longitudinal retractor muscles appear. This supports the notion that four introvert retractors were part of the ancestral sipunculan bodyplan. The longitudinal muscle fibers form a pattern of densely arranged fibers around the retractor muscles, indicating that the latter evolved from modified longitudinal body wall muscles. For a short time interval, the distribution of S-phase mitotic cells shows a metameric pattern in the developing ventral nerve cord during the pelagosphera stage. This pattern disappears close to metamorphic competence. Our findings are congruent with data on sipunculan neurogenesis, as well as with recent molecular analyses that place Sipuncula within Annelida, and thus strongly support a segmental ancestry of Sipuncula.
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