Looks can be deceiving:Didemnum pseudovexillumsp. nov. (Ascidiacea) in European harbours

Autor: Maria Casso, Marta Pascual, Frédérique Viard, Xavier Turon
Přispěvatelé: Centre for Advanced Studies of Blanes (CEAB, CSIC), Blanes, Catalonia, Spain, Department of Genetics, Microbiology and Statistics, and IRBio, University of Barcelona, Barcelona, Spain, Adaptation et diversité en milieu marin (AD2M), Station biologique de Roscoff (SBR), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut des Sciences de l'Evolution de Montpellier (UMR ISEM), École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre National de la Recherche Scientifique (CNRS)-Institut de recherche pour le développement [IRD] : UR226, Adaptation et diversité en milieu marin (ADMM), Institut national des sciences de l'Univers (INSU - CNRS)-Station biologique de Roscoff (SBR), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Institut de recherche pour le développement [IRD] : UR226-Centre National de la Recherche Scientifique (CNRS)
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: Marine Biodiversity
Marine Biodiversity, Springer Verlag, 2020, 50 (4), pp.48. ⟨10.1007/s12526-020-01083-7⟩
Marine Biodiversity, 2020, 50 (4), pp.48. ⟨10.1007/s12526-020-01083-7⟩
Digital.CSIC. Repositorio Institucional del CSIC
instname
ISSN: 2017-8808
1867-1616
1867-1624
DOI: 10.1007/s12526-020-01083-7⟩
Popis: Este artículo contiene 14 páginas, 1 tabla, 5 figuras.
A strongly divergent lineage, putatively a new cryptic species, of colonial ascidian was first detected as an anomalous sample in a population genomics study of the well-known worldwide invasive species Didemnum vexillum Kott, 2002. This putative new taxon, found in a marina in Roscoff, France, is indistinguishable from Didemnum vexillum in the external aspect and coexists with it in syntopy. However, morphological characters such as spicules and larvae allow a clear-cut distinction. In accordance with the preliminary results based on genome-wide analyses, morphological traits and mitochondrial sequences of the cytochrome oxidase I gene both support the establishment of a new species Didemnum pseudovexillum sp. nov. Previous unidentified sequences in public databases showed that the new species is also present in NW Mediterranean marinas. Didemnum pseudovexillum sp. nov. is assigned for the time being a cryptogenic species status, although its presently known disjoint distribution across two biogeographic regions and its presence in ports are suggestive of an introduced species. Further studies should be performed to ascertain its current distribution and putative natural range and settle its native vs. non-native status. This finding casts doubts on previous reports of Didemnum vexillum and also calls for caution when performing fast field surveys of non-indigenous species such as rapid assessment surveys (RAS) or BioBlitz surveys, based solely on external characters.
This research was funded by the project Table 1 PopCOmics (CTM2017-88080, MCIU/AEI/FEDER/UE) from the Spanish Government. Additional support for sampling and surveys in Brittany came from the AquaNIS2.0 project, supported by the Foundation TOTAL. This is a contribution from the Consolidated Research Group “Benthic Biology and Ecology” SGR2017-1120 (Catalan Government).
Databáze: OpenAIRE
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