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Xenoturbella bocki

ABSTRACT: Xenoturbella bocki overview

PROVIDER: PRJNA973143 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR21093359_1.fastq.gz	Fastqsanger.gz
	SRR21093359_2.fastq.gz	Fastqsanger.gz
	SRR21093360_1.fastq.gz	Fastqsanger.gz
	SRR21093360_2.fastq.gz	Fastqsanger.gz
	SRR21093361_1.fastq.gz	Fastqsanger.gz

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Xenoturbella bocki

Project description:Xenoturbella bocki Genome sequencing and assembly

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The genome of Xenoturbella bocki

Project description:The slow evolving genome of the xenacoelomorph worm Xenoturbella bocki

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Project description:Xenoturbella bocki transcriptome

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Project description:The genome of Xenoturbella bocki

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Single cell atlas of Xenoturbella bocki highlights the limited cell-type complexity of a non-vertebrate deuterostome lineage

Project description:We performed single-cell transcriptome analysis (using MARS-seq) in Xenoturbella bockii adult specimens.

2023-12-11 | GSE211408 | GEO

Single cell atlas of Xenoturbella bocki highlights the limited cell-type complexity of a non-vertebrate deuterostome lineage

Project description:Single cell atlas of Xenoturbella bocki highlights the limited cell-type complexity of a non-vertebrate deuterostome lineage

| PRJNA870142 | ENA

Xenoturbella profunda isolate:Xe holotype SIO-BIC BI1041

Project description:Xenoturbella profunda isolate:Xe holotype SIO-BIC BI1041 Genome sequencing

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A new species of Xenoturbella from the western Pacific Ocean and the evolution of Xenoturbella.

Project description:BackgroundXenoturbella is a group of marine benthic animals lacking an anus and a centralized nervous system. Molecular phylogenetic analyses group the animal together with the Acoelomorpha, forming the Xenacoelomorpha. This group has been suggested to be either a sister group to the Nephrozoa or a deuterostome, and therefore it may provide important insights into origins of bilaterian traits such as an anus, the nephron, feeding larvae and centralized nervous systems. However, only five Xenoturbella species have been reported and the evolutionary history of xenoturbellids and Xenacoelomorpha remains obscure.ResultsHere we describe a new Xenoturbella species from the western Pacific Ocean, and report a new xenoturbellid structure - the frontal pore. Non-destructive microCT was used to investigate the internal morphology of this soft-bodied animal. This revealed the presence of a frontal pore that is continuous with the ventral glandular network and which exhibits similarities with the frontal organ in acoelomorphs.ConclusionsOur results suggest that large size, oval mouth, frontal pore and ventral glandular network may be ancestral features for Xenoturbella. Further studies will clarify the evolutionary relationship of the frontal pore and ventral glandular network of xenoturbellids and the acoelomorph frontal organ. One of the habitats of the newly identified species is easily accessible from a marine station and so this species promises to be valuable for research on bilaterian and deuterostome evolution.

| S-EPMC5733810 | biostudies-literature

Correction to: A new species of Xenoturbella from the western Pacific Ocean and the evolution of Xenoturbella.

Project description:After publication of Nakano et al. (2017) [1], the authors became aware of the fact that the new species-group name erected for the two specimens of a Japanese xenoturbellid species in the article is not available because Nakano et al. (2017) [1] does not meet the requirement of the amendment of Article 8.5.3 of the International Code of Zoological Nomenclature (the Code) [2]. The authors therefore describe the two xenoturbellids as a new species again in this correction article. Methods for morphological observation, DNA extraction and sequencing were as described in Nakano et al. (2017) [1]. The holotype and paratype specimens are deposited in the National Museum of Nature and Science, Tsukuba (NSMT), Japan. The DNA sequences obtained were deposited in the International Nucleotide Sequence Database (INSD).

| S-EPMC5991446 | biostudies-literature

Acoelomorph flatworms are deuterostomes related to Xenoturbella.

Project description:Xenoturbellida and Acoelomorpha are marine worms with contentious ancestry. Both were originally associated with the flatworms (Platyhelminthes), but molecular data have revised their phylogenetic positions, generally linking Xenoturbellida to the deuterostomes and positioning the Acoelomorpha as the most basally branching bilaterian group(s). Recent phylogenomic data suggested that Xenoturbellida and Acoelomorpha are sister taxa and together constitute an early branch of Bilateria. Here we assemble three independent data sets-mitochondrial genes, a phylogenomic data set of 38,330 amino-acid positions and new microRNA (miRNA) complements-and show that the position of Acoelomorpha is strongly affected by a long-branch attraction (LBA) artefact. When we minimize LBA we find consistent support for a position of both acoelomorphs and Xenoturbella within the deuterostomes. The most likely phylogeny links Xenoturbella and Acoelomorpha in a clade we call Xenacoelomorpha. The Xenacoelomorpha is the sister group of the Ambulacraria (hemichordates and echinoderms). We show that analyses of miRNA complements have been affected by character loss in the acoels and that both groups possess one miRNA and the gene Rsb66 otherwise specific to deuterostomes. In addition, Xenoturbella shares one miRNA with the ambulacrarians, and two with the acoels. This phylogeny makes sense of the shared characteristics of Xenoturbellida and Acoelomorpha, such as ciliary ultrastructure and diffuse nervous system, and implies the loss of various deuterostome characters in the Xenacoelomorpha including coelomic cavities, through gut and gill slits.

| S-EPMC4025995 | biostudies-literature

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