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      A new cave amphipod, Pseudocrangonyx wonkimi sp. nov. (Crustacea, Amphipoda, Pseudocrangonyctidae), from the Korean Peninsula

      research-article
      Author(s): 1 , 2 , 1 ,
      Publication date (Electronic):
      Journal: ZooKeys
      Publisher: Pensoft Publishers
      Keywords: COI, Crangonyctoidea , groundwater, morphology, South Korea

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          Abstract

          A new species of pseudocrangonyctid amphipod, Pseudocrangonyx wonkimi sp. nov., was found in the groundwater of a cave in the southwestern Korean Peninsula. Pseudocrangonyx wonkimi sp. nov. is morphologically most closely related to P. joolaei Lee et al., 2020. However, P. wonkimi is clearly distinguished from P. joolaei by lacking sternal gills, fewer setae on maxilla 1 inner plate, fewer serrate robust setae on the carpus of the gnathopods, lacking bifid setae on the inner ramus of pleopod 3, and fewer articles of rami on pleopod 3. We also determined sequences of mitochondrial cytochrome c oxidase subunit I (COI) of P. wonkimi sp. nov. for molecular diagnosis. From the molecular analysis based on COI sequences, P. wonkimi showed the closest relationship with P. joolaei with 15.1% genetic distance.

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          Pattern and process in the biogeography of subterranean amphipods

          John R. Holsinger (1994)
          Article 0 comments Cited 22 times – based on 0 reviews     Review now
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            A molecular phylogeny of Pseudocrangonyx from Japan, including a new subterranean species (Crustacea, Amphipoda, Pseudocrangonyctidae)

            Ko Tomikawa, Takafumi Nakano, Anna Sato … (2016)
            A subterranean species of pseudocrangonyctid amphipod, Pseudocrangonyx gudariensis Tomikawa & Sato, sp. n., is described from the spring-fed stream Gudari-numa in Hakkoda Mountains, Aomori Prefecture, northern Japan. Pseudocrangonyx gudariensis is morphologically similar to P. coreanus Uéno, 1966 and P. febras Sidorov, 2009 based on its relatively small body size, small number of articles of rami of pleopods, and urosomite 1 without basal setae. However, P. gudariensis is distinguished from those species based on the following characteristics: from P. coreanus, antenna 2 of female without calceoli, palmar margins of gnathopods 1 and 2 with distally notched robust setae, inner margin of inner ramus of uropod 2 with 4 robust setae, and basal part of inner ramus of uropod 2 without slender seta; and from P. febras, carpus of gnathopod 2 without serrate robust setae on posterodistal corners, peduncle of pleopods 1 and 2 with setae, and longer article 2 of uropod 3. Phylogenetic analyses using nuclear 28S rRNA and histone H3, and mitochondrial cytochrome c oxidase subunit I and 16S rRNA markers showed that P. gudariensis is placed among known Pseudocrangonyx Akatsuka and Komai, 1922 species. However, its exact phylogenetic position within the genus could not be determined. The polyphyly of the Japanese Pseudocrangonyx species indicates that multiple colonization events of Pseudocrangonyx ancestors to the Japanese Archipelago could have occurred. The reliability of the past Pseudocrangonyx records from Japan is briefly discussed.
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              Two new subterranean species of Pseudocrangonyx Akatsuka & Komai, 1922 (Amphipoda: Crangonyctoidea: Pseudocrangonyctidae), with an insight into groundwater faunal relationships in western Japan

              Ko Tomikawa, Takafumi Nakano (2018)
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                Author and article information

                Contributors
                Gi-Sik Min
                Journal
                Journal ID (nlm-ta): Zookeys
                Journal ID (iso-abbrev): Zookeys
                Journal ID (publisher-id): 2
                Journal ID (index): urn:lsid:arphahub.com:pub:45048D35-BB1D-5CE8-9668-537E44BD4C7E
                Journal ID (aggregator): urn:lsid:zoobank.org:pub:91BD42D4-90F1-4B45-9350-EEF175B1727A
                Title: ZooKeys
                Publisher: Pensoft Publishers
                ISSN (Print): 1313-2989
                ISSN (Electronic): 1313-2970
                Publication date Collection: 2020
                Publication date (Electronic): 17 August 2020
                Volume: 960
                Pages: 1-15
                Affiliations
                [1 ] Department of Biological Sciences, Inha University, Incheon 22212, South Korea Inha University Incheon South Korea
                [2 ] Department of Science Education, Graduate School of Education, Hiroshima University, Higashihiroshima 739-8524, Japan Hiroshima University Higashihiroshima Japan
                Author notes
                Corresponding author: Gi-Sik Min ( mingisik@ 123456inha.ac.kr )

                Academic editor: Alan Myers

                Article
                Publisher ID: 53564
                DOI: 10.3897/zookeys.960.53564
                PMC ID: 7445190
                PubMed ID: 32884395
                SO-VID: 141c4bf4-f2cf-4f3a-9140-cda25f872b5f
                Copyright © Chi-Woo Lee, Ko Tomikawa, Gi-Sik Min
                License:

                This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

                History
                Date received : 23 April 2020
                Date accepted : 17 June 2020
                Categories
                Subject: Research Article
                Subject: Amphipoda
                Subject: Pseudocrangonyctidae
                Subject: Molecular Systematics
                Subject: Systematics
                Subject: Taxonomy
                Subject: Far East
                Subject: Korea
                Subject: South Korea

                ScienceOpen disciplines: Animal science & Zoology
                Keywords: coi, crangonyctoidea ,groundwater,morphology,south korea,animalia,amphipoda,pseudocrangonyctidae
                Data availability:
                ScienceOpen disciplines: Animal science & Zoology
                Keywords: coi, crangonyctoidea , groundwater, morphology, south korea, animalia, amphipoda, pseudocrangonyctidae

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