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<p>In this study, maximum likelihood phylogenetic analyses of molecular markers (two mitochondrial genes—COI and 16S rRNA) confirmed that <i>Lagis koreni</i> Malmgren, 1866 represents in fact two distinct and well-supported species lineages. Examination of individuals collected on the West coast of Sweden, North of Norway, Northwest Spain, and North of Portugal allowed to morphologically characterise these two lineages. Consequently, <i>Lagis koreni</i> is redescribed based on type material, and a new species named <i>Lagis depende</i> <b>sp. nov.</b> is formally described. The size and number of the crenulations of the anal flap are revealed as main discriminant characters. The lectotype of <i>L. koreni</i> was revised and identified to belong to <i>Cistenides hyperborea</i> Malmgren, 1866 and a new lectotype for <i>L. koreni</i> is therefore tentatively proposed. Individuals of <i>Amphictene auricoma</i> (O.F. Müller, 1776) were also included in the molecular analyses resulting in a well-delineated lineage.</p>

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A new species of Lagis Malmgren, 1866 (Annelida; Pectinariidae) and revision of the type material of Lagis koreni

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年4月9日

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  • María Barroso,
  • María Capa,
  • Ascensão Ravara,
  • Juan Moreira,
  • Julio Parapar

摘要

In this study, maximum likelihood phylogenetic analyses of molecular markers (two mitochondrial genes—COI and 16S rRNA) confirmed that Lagis koreni Malmgren, 1866 represents in fact two distinct and well-supported species lineages. Examination of individuals collected on the West coast of Sweden, North of Norway, Northwest Spain, and North of Portugal allowed to morphologically characterise these two lineages. Consequently, Lagis koreni is redescribed based on type material, and a new species named Lagis depende sp. nov. is formally described. The size and number of the crenulations of the anal flap are revealed as main discriminant characters. The lectotype of L. koreni was revised and identified to belong to Cistenides hyperborea Malmgren, 1866 and a new lectotype for L. koreni is therefore tentatively proposed. Individuals of Amphictene auricoma (O.F. Müller, 1776) were also included in the molecular analyses resulting in a well-delineated lineage.