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Rhamphocottus nagaakii (Cottoidea : Rhamphocottidae), a new species of grunt sculpin from the northwestern Pacific, with notes on the phylogeography of the genus Rhamphocottus
| Title: | Rhamphocottus nagaakii (Cottoidea : Rhamphocottidae), a new species of grunt sculpin from the northwestern Pacific, with notes on the phylogeography of the genus Rhamphocottus |
| Authors: | Munehara, Hiroyuki Browse this author →KAKEN DB | | Togashi, Kouji Browse this author | | Yamada, Sayuri Browse this author | | Higashimura, Takushi Browse this author | | Yamazaki, Aya Browse this author | | Suzuki, Shota Browse this author | | Abe, Takuzo Browse this author | | Awata, Satoshi Browse this author →KAKEN DB | | Koya, Yasunori Browse this author →KAKEN DB | | Tsuruoka, Osamu Browse this author |
| Keywords: | Perciformes | | Rhamphocottus richardsonii | | Mitochondrial DNA | | Divergence time | | Discrete distribution |
| Issue Date: | 23-Aug-2022 |
| Publisher: | Springer |
| Journal Title: | Ichthyological research |
| Volume: | 70 |
| Start Page: | 268 |
| End Page: | 285 |
| Publisher DOI: | 10.1007/s10228-022-00885-y |
| Abstract: | A new species of grunt sculpin, Rhamphocottus nagaakii inhabiting the northwestern Pacific, previously identified as Rhamphocottus richardsonii Gunther 1874, is described based on genetic evidence and morphological differences. The new species can be distinguished based on morphometric characters related to the head, including head length [45.3-54.6% of standard length (SL)], postorbital head length (18.8-25.5% SL) and the length of pectoral-fin base (15.8-20.7% SL), which are smaller than in R. richardsonii (53.6-60.5% SL, 26.2-31.7% SL, and 19.5-25.2% SL, respectively). Genetic differences between two species markedly exceed levels for intra-specific differences. Rhamphocottus nagaakii is considered to have arisen from a common ancestor of the two species, which probably inhabited somewhere the North Pacific Rim around the Aleutian Archipelago. During a period of cooling in the Pliocene or the Miocene, R. nagaakii and R. richardsonii became separated to the southern regions of the northwestern and northeastern Pacific, and subsequently underwent speciation. |
| Rights: | This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: http://dx.doi.org/10.1007/s10228-022-00885-y |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/90323 |
| Appears in Collections: | 北方生物圏フィールド科学センター (Field Science Center for Northern Biosphere) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 宗原 弘幸
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