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Morphological and molecular description Ciona intermedia (Tunicata, Ascidiacea)

ABSTRACT: Morphological and molecular identification of the new species Ciona intermedia sp. nov. (Tunicata, Ascidiacea)

PROVIDER: PRJEB31427 | ENA |

REPOSITORIES: ENA

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Contrasting global genetic patterns in two biologically similar, widespread and invasive Ciona species (Tunicata, Ascidiacea).

Project description:Human-mediated dispersal interplays with natural processes and complicates understanding of the biogeographical history of species. This is exemplified by two invasive tunicates, Ciona robusta (formerly Ciona intestinalis type A) and C. intestinalis (formerly Ciona intestinalis type B), globally distributed and sympatric in Europe. By gathering new mitochondrial sequences that were merged with published datasets, we analysed genetic patterns in different regions, with a focus on 1) their sympatric range and 2) allopatric populations in N and S America and southern Europe. In the sympatric range, the two species display contrasting genetic diversity patterns, with low polymorphism in C. robusta supporting the prevalent view of its recent introduction. In the E Pacific, several genetic traits support the non-native status of C. robusta. However, in the NE Pacific, this appraisal requires a complex scenario of introduction and should be further examined supported by extensive sampling efforts in the NW Pacific (putative native range). For C. intestinalis, Bayesian analysis suggested a natural amphi-North Atlantic distribution, casting doubt on its non-native status in the NW Atlantic. This study shows that both natural and human-mediated dispersal have influenced genetic patterns at broad scales; this interaction lessens our ability to confidently ascertain native vs. non-native status of populations, particularly of those species that are globally distributed.

| S-EPMC4853746 | biostudies-literature

Barcoding of the of the syntype of Botrylloides crystallinus n. sp. (Tunicata, Ascidiacea, Styelidae)

Project description:Molecular characterisation of the syntype of Botrylloides crystallinus n. sp. (Tunicata, Ascidiacea, Styelidae) from Mediterranean Sea

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Katharina tunicata

Project description:Katharina tunicata

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Phylogenomic and morphological relationships among the botryllid ascidians (Subphylum Tunicata, Class Ascidiacea, Family Styelidae).

Project description:Ascidians (Phylum Chordata, Class Ascidiacea) are a large group of invertebrates which occupy a central role in the ecology of marine benthic communities. Many ascidian species have become successfully introduced around the world via anthropogenic vectors. The botryllid ascidians (Order Stolidobranchia, Family Styelidae) are a group of 53 colonial species, several of which are widespread throughout temperate or tropical and subtropical waters. However, the systematics and biology of this group of ascidians is not well-understood. To provide a systematic framework for this group, we have constructed a well-resolved phylogenomic tree using 200 novel loci and 55 specimens. A Principal Components Analysis of all species described in the literature using 31 taxonomic characteristics revealed that some species occupy a unique morphological space and can be easily identified using characteristics of adult colonies. For other species, additional information such as larval or life history characteristics may be required for taxonomic discrimination. Molecular barcodes are critical for guiding the delineation of morphologically similar species in this group.

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Katharina tunicata

Project description:Katharina tunicata overview

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Ascidiacea (Chordata: Tunicata) of Greece: an updated checklist.

Project description:BackgroundThe checklist of the ascidian fauna (Tunicata: Ascidiacea) of Greece was compiled within the framework of the Greek Taxon Information System (GTIS), an application of the LifeWatchGreece Research Infrastructure (ESFRI) aiming to produce a complete checklist of species recorded from Greece. This checklist was constructed by updating an existing one with the inclusion of recently published records. All the reported species from Greek waters were taxonomically revised and cross-checked with the Ascidiacea World Database.New informationThe updated checklist of the class Ascidiacea of Greece comprises 75 species, classified in 33 genera, 12 families, and 3 orders. In total, 8 species have been added to the previous species list (4 Aplousobranchia, 2 Phlebobranchia, and 2 Stolidobranchia). Aplousobranchia was the most speciose order, followed by Stolidobranchia. Most species belonged to the families Didemnidae, Polyclinidae, Pyuridae, Ascidiidae, and Styelidae; these 4 families comprise 76% of the Greek ascidian species richness. The present effort revealed the limited taxonomic research effort devoted to the ascidian fauna of Greece, which is attributed to the lack of experts and low sampling effort. Therefore, major knowledge gaps on the ascidian diversity of Greece occur and further research in this field is needed.

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Ascidiacea

Project description:Survey of bacteria associated with different Scandinavian Ascidiacea species

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Role of OxyR in Prevotella intermedia

Project description:Wild type Prevotella intermedia OMA14 strain (V3203) was used to compare to the OxyR-deficient strain (V3147).

2021-03-31 | GSE168003 | GEO

Role of iron in gene regulation in Prevotella intermedia

Project description:Role of iron in gene regulation in Prevotella intermedia

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Project description:We present a comprehensive proteome atlas of the model chordate Ciona, covering eight developmental stages and ~7k translated genes as well as a deep quantitative atlas of maternal proteins found in the Ciona egg.

2023-11-28 | PXD043619 | Pride

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