Delimiting the polymorphic congeners of the genus Oerstedia Quatrefages, 1864 (Nemertea, Hoplonemertea), and descriptions of three new species from the Northwest Pacific
Three new species of the monostiliferous hoplonemertean genus Oerstedia Quatrefages, 1864, are herein described using morphological and molecular data—Oerstedia pseudoculata sp. nov., from Akkeshi Bay and Oshoro Bay, Hokkaido, Japan, and from Aniwa Bay, Sakhalin, Russia; Oerstedia rugosa sp. nov. fr...
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Frontiers Media S.A.
2024-02-01
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| Series: | Frontiers in Ecology and Evolution |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fevo.2024.1356316/full |
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| author | Jamael C. Abato Jamael C. Abato Alexei V. Chernyshev Natsumi Hookabe Aoi Tsuyuki Gauri Kaushik Hiroshi Kajihara |
| author_facet | Jamael C. Abato Jamael C. Abato Alexei V. Chernyshev Natsumi Hookabe Aoi Tsuyuki Gauri Kaushik Hiroshi Kajihara |
| author_sort | Jamael C. Abato |
| collection | DOAJ |
| description | Three new species of the monostiliferous hoplonemertean genus Oerstedia Quatrefages, 1864, are herein described using morphological and molecular data—Oerstedia pseudoculata sp. nov., from Akkeshi Bay and Oshoro Bay, Hokkaido, Japan, and from Aniwa Bay, Sakhalin, Russia; Oerstedia rugosa sp. nov. from Sagami Bay, Misaki, Kanagawa, Japan, and Van Phong Bay, Vietnam; and Oerstedia viridifusca sp. nov. from Manazuru, Kanagawa, Japan. As to the external morphology, O. pseudoculata sp. nov. can be differentiated from O. oculata only by its bright-orange ocelli visible on both sides of the head, and a proboscis pore opening at the ventral tip of the head. These two sister species repeat each other’s color patterns, a phenomenon that can be explained by Vavilov’s law of homologous series. Oerstedia rugosa sp. nov. can be identified by its carmine or deep-red to brownish-red body with several longitudinal, intertwined white lines or wrinkles running from the head to the posterior body, and by 17–23 vaguely bordered white bands composed of variedly sized dots encircling the body, arranged at irregular intervals. Oerstedia viridifusca sp. nov. can be distinguished from other Oerstedia by (i) the entire body flecked with minute greenish-brown dots, especially densely on the anterior portion of the dorsal surface, but sparsely on the posterior half of the ventral surface; (ii) a collar-like portion encircling the body along the posterior cephalic furrow where the greenish-brown dots are absent; (iii) the anterolateral edges of the head lacking the greenish-brown dots; and (iv) the ocelli being brownish-orange in color. Oerstedia phoresiae (Kulikova, 1987) is reported for the first time from Japan, in addition to its previous distribution record in Russia and in South Korea. Phylogenetic analyses based on the 16S, 18S, 28S ribosomal RNA, cytochrome c oxidase subunit I, and histone H3 genes show that the new species are true congeners of the genus Oerstedia with O. pseudoculata sp. nov. and O. viridifusca sp. nov. nested within the clade Paroerstediella whereas O. rugosa sp. nov. in the clade Oerstedia. This taxonomic work emphasizes the importance of DNA barcode sequence in the taxonomy and systematics of the polymorphic congeners of the genus Oerstedia. |
| first_indexed | 2024-03-08T00:23:34Z |
| format | Article |
| id | doaj.art-175565d2c78b4d02b447181f1197ec72 |
| institution | Directory Open Access Journal |
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| last_indexed | 2024-03-08T00:23:34Z |
| publishDate | 2024-02-01 |
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| series | Frontiers in Ecology and Evolution |
| spelling | doaj.art-175565d2c78b4d02b447181f1197ec722024-02-16T04:29:08ZengFrontiers Media S.A.Frontiers in Ecology and Evolution2296-701X2024-02-011210.3389/fevo.2024.13563161356316Delimiting the polymorphic congeners of the genus Oerstedia Quatrefages, 1864 (Nemertea, Hoplonemertea), and descriptions of three new species from the Northwest PacificJamael C. Abato0Jamael C. Abato1Alexei V. Chernyshev2Natsumi Hookabe3Aoi Tsuyuki4Gauri Kaushik5Hiroshi Kajihara6Graduate School of Science, Hokkaido University, Sapporo, JapanBiology Department, Mindanao State University, Marawi City, PhilippinesZhirmunsky National Scientific Center of Marine Biology, Far Eastern Branch, Russian Academy of Sciences, Vladivostok, RussiaDeep-Sea Biodiversity Research Group (DeepBio), Research Institute for Global Change (RIGC), Japan Agency for Marine-Science and Technology (JAMSTEC), Yokosuka, JapanCreative Research Institute, Faculty of Science, Hokkaido University, Sapporo, JapanDepartment of Biological Sciences, School of Science, Hokkaido University, Sapporo, JapanFaculty of Science, Hokkaido University, Sapporo, JapanThree new species of the monostiliferous hoplonemertean genus Oerstedia Quatrefages, 1864, are herein described using morphological and molecular data—Oerstedia pseudoculata sp. nov., from Akkeshi Bay and Oshoro Bay, Hokkaido, Japan, and from Aniwa Bay, Sakhalin, Russia; Oerstedia rugosa sp. nov. from Sagami Bay, Misaki, Kanagawa, Japan, and Van Phong Bay, Vietnam; and Oerstedia viridifusca sp. nov. from Manazuru, Kanagawa, Japan. As to the external morphology, O. pseudoculata sp. nov. can be differentiated from O. oculata only by its bright-orange ocelli visible on both sides of the head, and a proboscis pore opening at the ventral tip of the head. These two sister species repeat each other’s color patterns, a phenomenon that can be explained by Vavilov’s law of homologous series. Oerstedia rugosa sp. nov. can be identified by its carmine or deep-red to brownish-red body with several longitudinal, intertwined white lines or wrinkles running from the head to the posterior body, and by 17–23 vaguely bordered white bands composed of variedly sized dots encircling the body, arranged at irregular intervals. Oerstedia viridifusca sp. nov. can be distinguished from other Oerstedia by (i) the entire body flecked with minute greenish-brown dots, especially densely on the anterior portion of the dorsal surface, but sparsely on the posterior half of the ventral surface; (ii) a collar-like portion encircling the body along the posterior cephalic furrow where the greenish-brown dots are absent; (iii) the anterolateral edges of the head lacking the greenish-brown dots; and (iv) the ocelli being brownish-orange in color. Oerstedia phoresiae (Kulikova, 1987) is reported for the first time from Japan, in addition to its previous distribution record in Russia and in South Korea. Phylogenetic analyses based on the 16S, 18S, 28S ribosomal RNA, cytochrome c oxidase subunit I, and histone H3 genes show that the new species are true congeners of the genus Oerstedia with O. pseudoculata sp. nov. and O. viridifusca sp. nov. nested within the clade Paroerstediella whereas O. rugosa sp. nov. in the clade Oerstedia. This taxonomic work emphasizes the importance of DNA barcode sequence in the taxonomy and systematics of the polymorphic congeners of the genus Oerstedia.https://www.frontiersin.org/articles/10.3389/fevo.2024.1356316/fullbiodiversityDNA barcodinginvertebrateJAMBIOmonostiliferaribbon worm |
| spellingShingle | Jamael C. Abato Jamael C. Abato Alexei V. Chernyshev Natsumi Hookabe Aoi Tsuyuki Gauri Kaushik Hiroshi Kajihara Delimiting the polymorphic congeners of the genus Oerstedia Quatrefages, 1864 (Nemertea, Hoplonemertea), and descriptions of three new species from the Northwest Pacific Frontiers in Ecology and Evolution biodiversity DNA barcoding invertebrate JAMBIO monostilifera ribbon worm |
| title | Delimiting the polymorphic congeners of the genus Oerstedia Quatrefages, 1864 (Nemertea, Hoplonemertea), and descriptions of three new species from the Northwest Pacific |
| title_full | Delimiting the polymorphic congeners of the genus Oerstedia Quatrefages, 1864 (Nemertea, Hoplonemertea), and descriptions of three new species from the Northwest Pacific |
| title_fullStr | Delimiting the polymorphic congeners of the genus Oerstedia Quatrefages, 1864 (Nemertea, Hoplonemertea), and descriptions of three new species from the Northwest Pacific |
| title_full_unstemmed | Delimiting the polymorphic congeners of the genus Oerstedia Quatrefages, 1864 (Nemertea, Hoplonemertea), and descriptions of three new species from the Northwest Pacific |
| title_short | Delimiting the polymorphic congeners of the genus Oerstedia Quatrefages, 1864 (Nemertea, Hoplonemertea), and descriptions of three new species from the Northwest Pacific |
| title_sort | delimiting the polymorphic congeners of the genus oerstedia quatrefages 1864 nemertea hoplonemertea and descriptions of three new species from the northwest pacific |
| topic | biodiversity DNA barcoding invertebrate JAMBIO monostilifera ribbon worm |
| url | https://www.frontiersin.org/articles/10.3389/fevo.2024.1356316/full |
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