Two New Species of the Genus <i>Longipedia</i> Claus, 1863 (Copepoda: Harpacticoida: Longipediidae) from Korea, with an Update and a Key to Species
Benthic harpacticoids were collected from Korean waters. Two species were identified as members of the genus <i>Longipedia</i> Claus, 1863, because they have an extremely elongated distal segment of the P2 endopod. <i>Longipedia</i> <i>koreana</i> sp. nov. is morp...
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| Autores principales: | , , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
MDPI AG
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/4e8e78e7cb474a56bd9bc61a9858ccb5 |
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| Sumario: | Benthic harpacticoids were collected from Korean waters. Two species were identified as members of the genus <i>Longipedia</i> Claus, 1863, because they have an extremely elongated distal segment of the P2 endopod. <i>Longipedia</i> <i>koreana</i> sp. nov. is morphologically most closely related to <i>L. nichollsi</i> Wells, 1980 and <i>L. scotti</i> Sars, 1903, but it can clearly be distinguished from both species based on the following morphological characteristics: P1 coxa with strong spinules near the outer margin and the distal element being much bigger than the proximal elements, P2 coxa with a small inner seta on the anterior surface, P4 exopod first segment without an inner element, and the P5 with a rectangular exopod (more than 3.5 times as long as wide). <i>L. ulleungensis</i> sp. nov. is similar to <i>L. brevispinosa</i> Gurney, 1927, <i>L. spinulosa</i> Itô, 1981, and <i>L. weberi</i> Scott A., 1909. However, <i>L. ulleungensis</i> sp. nov. is characterized by the P2 coxa with a reduced inner seta, the P4 exopod second segment without an inner seta, and the anal operculum with a long median projection, a single spine, and a group of outer spines on each side. In a molecular analysis using the mitochondrial cytochrome c oxidase subunit I (COI) and 18S ribosomal RNA (18S rRNA) genes, the inter-specific variation was 22.525–23.102% and 1.325–1.382% of COI and 18S rRNA between the two new species, respectively. A key to the family Longipediidae is provided herein. |
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