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Margelopsid species search taxonomic home within Corymorphidae and Boreohydridae
Kupaeva, D.; Lebedeva, T.; Kobrinsky, Z.; Vanwalleghem, D.; Prudkovsky, A.; Kremnyov, S. (2023). Margelopsid species search taxonomic home within Corymorphidae and Boreohydridae. PeerJ 11: e16265. https://dx.doi.org/10.7717/peerj.16265
In: PeerJ. PeerJ: Corte Madera & London. ISSN 2167-8359; e-ISSN 2167-8359
Peer reviewed article  
Beschikbaar in  Auteurs 
Trefwoorden
    Corymorphidae Allman, 1872 [WoRMS]; Margelopsidae Mayer, 1910 [WoRMS]; Margelopsis haeckelii Hartlaub, 1897 [WoRMS]; Margelopsis hartlaubii Browne, 1903 [WoRMS]; Plotocnide borealis Wagner, 1885 [WoRMS]
    Marien/Kust
Author keywords
    Cnidaria, Hydrozoa, Corymorphidae, Margelopsidae, Margelopsis haeckelii, Margelopsis hartlaubi, Plotocnide borealis, Molecular phylogeny
Auteurs  Top 
  • Kupaeva, D.
  • Lebedeva, T.
  • Kobrinsky, Z.
  • Vanwalleghem, D.
  • Prudkovsky, A.
  • Kremnyov, S.
Abstract
    Planktonic lifestyle of polyps in representatives of Margelopsidae are very different from all other species in the hydrozoan clade Aplanulata. Their evolutionary origin and phylogenetic position have been the subject of significant speculation. A recent molecular study based only on COI data placed Margelopsidae as a sister group to all Aplanulata, an unexpected result because margelopsid morphology suggests affiliation with Tubulariidae or Corymorphidae. Here we used multigene analyses, including nuclear (18S rRNA and 28S rRNA) and mitochondrial (16S rRNA and COI) markers of the hydroid stage of the margelopsid species Margelopsis haeckelii and the medusa stage of Margelopsis hartlaubii to resolve their phylogenetic position with respect to other hydrozoans. Our data provide strong evidence that M. haeckelii, the type species of Margelopsis, is a member of the family Corymorphidae. In contrast, M. hartlaubii is sister to Plotocnide borealis, a member of Boreohydridae. These results call into question the validity of the genus Margelopsis and the family Margelopsidae. The systematic position of M. haeckelii is discussed in light of the phylogeny of Corymorphidae.
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