ArticlePhilosophical transactions of the Royal Society of London. Series B, Biological sciences2016
The larval nervous system of the penis worm Priapulus caudatus (Ecdysozoa).
Article in Philosophical transactions of the Royal Society of London. Series B, Biological sciences, 2016. 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, 24 citations in OpenAlex.
- Preservation and early evolution of scalidophoran ventral nerve cord.Science advances · 2025Article
- Review
- Phylogenetic tracing of midbrain-specific regulatory sequences suggests single origin of eubilaterian brains.Science advances · 2023Article
- Internal anatomy of a fossilized embryonic stage of the Cambrian-Ordovician scalidophoranRoyal Society open science · 2022Article
- Neuroanatomy of mud dragons: a comprehensive view of the nervous system in Echinoderes (Kinorhyncha) by confocal laser scanning microscopy.BMC evolutionary biology · 2019Article
- Assessing segmental versus non-segmental features in the ventral nervous system of onychophorans (velvet worms).BMC evolutionary biology · 2017Article
- Embryonic chirality and the evolution of spiralian left-right asymmetries.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2016Article
- Introduction to 'Homology and convergence in nervous system evolution'.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2016Article
- The neuromuscular system ofEvoDevo · 2016Article
- Comparative localization of serotonin-like immunoreactive cells in Thaliacea informs tunicate phylogeny.Frontiers in zoology · 2016Article
- Embracing the comparative approach: how robust phylogenies and broader developmental sampling impacts the understanding of nervous system evolution.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2015Review
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Authors and funding
4 authors at 2 institutions in 2 countries.
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No grant is acknowledged in the PubMed record.
Abstract
The origin and extreme diversification of the animal nervous system is a central question in biology. While most of the attention has traditionally been paid to those lineages with highly elaborated nervous systems (e.g. arthropods, vertebrates, annelids), only the study of the vast animal diversity can deliver a comprehensive view of the evolutionary history of this organ system. In this regard, the phylogenetic position and apparently conservative molecular, morphological and embryological features of priapulid worms (Priapulida) place this animal lineage as a key to understanding the evolution of the Ecdysozoa (i.e. arthropods and nematodes). In this study, we characterize the nervous system of the hatching larva and first lorica larva of the priapulid worm Priapulus caudatus by immunolabelling against acetylated and tyrosinated tubulin, pCaMKII, serotonin and FMRFamide. Our results show that a circumoral brain and an unpaired ventral nerve with a caudal ganglion characterize the central nervous system of hatching embryos. After the first moult, the larva attains some adult features: a neck ganglion, an introvert plexus, and conspicuous secondary longitudinal neurites. Our study delivers a neuroanatomical framework for future embryological studies in priapulid worms, and helps illuminate the course of nervous system evolution in the Ecdysozoa.
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