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A new deep-sea genus of Paramunnidae (Isopoda: Asellota) from the Northwest Pacific adjacent to the Kuril-Kamchatka Trench with remarks on paedomorphosis in deep-sea species
Golovan, O.A.; Malyutina, M.V. (2019). A new deep-sea genus of Paramunnidae (Isopoda: Asellota) from the Northwest Pacific adjacent to the Kuril-Kamchatka Trench with remarks on paedomorphosis in deep-sea species. Prog. Oceanogr. 178: 102200. https://dx.doi.org/10.1016/j.pocean.2019.102200
In: Progress in Oceanography. Pergamon: Oxford,New York,. ISSN 0079-6611; e-ISSN 1873-4472, meer
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| Trefwoorden |
Asellota [WoRMS]; Isopoda [WoRMS]; Paramunnidae Vanhöffen, 1914 [WoRMS]; Reductogonium
Marien/Kust |
| Author keywords |
Isopoda; Asellota; Paramunnidae; Reductogonium; new genus; new species; taxonomy; neoteny; heterochrony; Northwest Pacific; abyssal; deep-sea |
| Auteurs | | Top |
- Golovan, O.A.
- Malyutina, M.V.
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| Abstract |
Reductogonium Iroquois gen. nov. sp. nov., a new genus and species of paramunnid isopods from the Northwest Pacific open abyssal plain to the east of the Kuril-Kamchatka Trench, is described based on materials from the KuramBio expedition (2012). The new genus is distinguished from other paramunnid genera by its reduced pereonite 7 that lacks appendages in adult individuals (one seta is presented instead of the pereopod VII on its position). It is also distinguished by its head, which has a medial crest bearing a tuft of setae on its posterior part, and by the extremely long articles of antennae and pereopods. The unusual paedomorphic features of the new genus might be adaptations to deep-sea conditions. Paedomorphosis was recorded for different taxa of deep-sea animals. The reduction of the last pair of pereopods, which corresponds to the state of manca stages, was observed independently in different families and orders of Isopoda. Finding a new species and a new genus of the Paramunnidae with paedomorphic features confirmed that this phenomenon is a common evolutionary strategy for deep-sea Asellota. |
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