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Huervana JJDLC, Kano Y, Ando D, Onikura N, Kurita Y. Preliminary assessment of genetic variation in the Japanese endemic freshwater crab, Geothelphusadehaani, based on mitochondrial DNA sequences. Biodivers Data J 2023; 11:e97438. [PMID: 38327312 PMCID: PMC10848686 DOI: 10.3897/bdj.11.e97438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Accepted: 04/17/2023] [Indexed: 02/09/2024] Open
Abstract
Geothelphusadehaani, a freshwater crab species endemic to Japan, has the largest distribution range amongst the 19 known species in the country. Due to its low dispersal capability and restricted habitat to freshwater, it serves as an excellent model for understanding gene flow between geographically isolated populations. In this study, we analysed the genetic relationships of 26 G.dehaani populations collected from different locations in the Japanese archipelago using two mitochondrial DNA regions - cytochrome oxidase subunit I (COI) and cytochrome b (cytB). Our results from the analysis of molecular variance (AMOVA) revealed high genetic variation amongst populations and the phylogenetic analysis identified four geographical groups: Clade I - Honshu and Shikoku, Clade II - north-eastern Kyushu, Clade III - southern Kyushu and Clade IV - north-western Kyushu. Notably, Clade IV exhibited the highest genetic distance amongst the observed groupings. These findings highlight the need for further examination of G.dehaani in Kyushu, including morphological and behavioural traits, to better understand the observed diversity within the species in the region.
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Affiliation(s)
- Joana Joy De la Cruz Huervana
- Fishery Research Laboratory, Kyushu University, Fukuoka, JapanFishery Research Laboratory, Kyushu UniversityFukuokaJapan
- Aquaculture Department, Southeast Asian Fisheries Development Center, Iloilo, PhilippinesAquaculture Department, Southeast Asian Fisheries Development CenterIloiloPhilippines
| | - Yuichi Kano
- Kyushu University, Fukuoka, JapanKyushu UniversityFukuokaJapan
- Kyushu Open University, Fukuoka, JapanKyushu Open UniversityFukuokaJapan
| | - Daiki Ando
- Fishery Research Laboratory, Kyushu University, Fukuoka, JapanFishery Research Laboratory, Kyushu UniversityFukuokaJapan
| | - Norio Onikura
- Fishery Research Laboratory, Kyushu University, Fukuoka, JapanFishery Research Laboratory, Kyushu UniversityFukuokaJapan
| | - Yoshihisa Kurita
- Fishery Research Laboratory, Kyushu University, Fukuoka, JapanFishery Research Laboratory, Kyushu UniversityFukuokaJapan
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Uyeno D, Kaneko T, Uyeno H, Miyazaki W, Tosuji H. Temnosewellia aff. vietnamensis (Platyhelminthes: Rhabdocoela: Temnocephalidae) associated with freshwater crabs from Kagoshima, southern Japan, with review of records of the genus from East to South Asian countries. J Helminthol 2022; 96:e58. [PMID: 35912882 DOI: 10.1017/S0022149X22000190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Temnocephalids are ectosymbionts of various freshwater animals. A species tentatively identified as Temnosewellia aff. vietnamensis (Platyhelminthes: Rhabdocoela: Temnocephalidae) is reported based on materials collected from the body surface of the freshwater crabs Eriocheir japonica (Brachyura: Varunidae) and Geothelphusa exigua (Potamidae) in Kagoshima, southern Japan. The temnocephalid is characterized as follows: the cirrus composed of a cone-shaped shaft and a cylindrical introvert 42-77 μm long; the introvert covered with approximately 30 vertical rows of fine sharp spines; the four seminal receptacles; and a long, curved oviduct with vaginal gland; a pair of gland cells (Haswell's cells) present anterior to the excretory ampullae. Bayesian inference trees using partial nuclear 28S rDNA (28S) and mitochondrial cytochrome c oxidase subunit I (COI) genes supported that the specimens collected from both crab species are conspecific but these also showed the geographical variations among them on both 28S and COI. The previous records of the genus Temnosewellia in East to South Asian countries are assembled and shown on the map (fig.7, this paper).
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Parvizi E, Keikhosravi A, Naderloo R, Solhjouy‐Fard S, Sheibak F, Schubart CD. Phylogeography of Potamon ibericum (Brachyura: Potamidae) identifies Quaternary glacial refugia within the Caucasus biodiversity hot spot. Ecol Evol 2019; 9:4749-4759. [PMID: 31031941 PMCID: PMC6476761 DOI: 10.1002/ece3.5078] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Revised: 02/18/2019] [Accepted: 02/22/2019] [Indexed: 11/30/2022] Open
Abstract
Refugia are critical for the maintenance of biodiversity during the periods of Quaternary climatic oscillations. The long-term persistence of refugial populations in a large continuous refugium has resulted in a homogenous pattern of genetic structure among populations, while highly structured evolutionary lineages characterize the restriction of refugial populations to smaller subrefugia. These mechanisms have resulted in the identification of hot spots of biodiversity within putative glacial refugia. We studied phylogeography of Potamon ibericum (Brachyura: Potamidae) in the drainages of the western Caucasus biodiversity hot spot (i.e., Colchis and the Caucasus) to infer spatial genetic structure and potential refugia for a freshwater crab in this region. These areas have traditionally considered as a refugium due to the presence of Tertiary relict species. We integrated population genetic data and historical demographic analysis from cytochrome oxidase subunit I sequences and paleoclimatic data from species distribution modeling (SDM). The results revealed the lack of phylogeographic structure and provided evidence for demographic expansion. The SDM presented a rather homogenous and large refugium that extended from northeast Turkey to Colchis during the last glacial period. In contrast to these findings, previous phylogeographic study on P. ibericum of the eastern Caucasus biodiversity hot spot (i.e., Hyrcania) identified multiple independent refugia. By combining these results, we explain the significance of this important western Palearctic hot spot of biological diversity in shaping the geographic distribution of intraspecific genetic diversity in a freshwater taxon.
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Affiliation(s)
- Elaheh Parvizi
- School of Biology, College of ScienceUniversity of TehranTehranIran
- Present address:
Department of ZoologyUniversity of OtagoDunedinNew Zealand
| | | | - Reza Naderloo
- School of Biology, College of ScienceUniversity of TehranTehranIran
| | - Samaneh Solhjouy‐Fard
- Department of Plant Protection, College of Agriculture and Natural ResourcesUniversity of TehranKarajIran
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Bland LM, Bielby J, Kearney S, Orme CDL, Watson JEM, Collen B. Toward reassessing data-deficient species. Conserv Biol 2017; 31:531-539. [PMID: 27696559 DOI: 10.1111/cobi.12850] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Revised: 08/14/2016] [Accepted: 09/29/2016] [Indexed: 06/06/2023]
Abstract
One in 6 species (13,465 species) on the International Union for Conservation of Nature (IUCN) Red List is classified as data deficient due to lack of information on their taxonomy, population status, or impact of threats. Despite the chance that many are at high risk of extinction, data-deficient species are typically excluded from global and local conservation priorities, as well as funding schemes. The number of data-deficient species will greatly increase as the IUCN Red List becomes more inclusive of poorly known and speciose groups. A strategic approach is urgently needed to enhance the conservation value of data-deficient assessments. To develop this, we reviewed 2879 data-deficient assessments in 6 animal groups and identified 8 main justifications for assigning data-deficient status (type series, few records, old records, uncertain provenance, uncertain population status or distribution, uncertain threats, taxonomic uncertainty, and new species). Assigning a consistent set of justification tags (i.e., consistent assignment to assessment justifications) to species classified as data deficient is a simple way to achieve more strategic assessments. Such tags would clarify the causes of data deficiency; facilitate the prediction of extinction risk; facilitate comparisons of data deficiency among taxonomic groups; and help prioritize species for reassessment. With renewed efforts, it could be straightforward to prevent thousands of data-deficient species slipping unnoticed toward extinction.
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Affiliation(s)
- Lucie M Bland
- School of BioSciences, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Jon Bielby
- Institute of Zoology, Zoological Society of London, Regent's Park, London, NW1 4RY, U.K
| | - Stephen Kearney
- School of Geography, Planning and Environmental Management, University of Queensland, St. Lucia, QLD, 4072, Australia
| | - C David L Orme
- Division of Biology, Imperial College London, Silwood Park, Ascot, SL5 7PY, U.K
| | - James E M Watson
- School of Geography, Planning and Environmental Management, University of Queensland, St. Lucia, QLD, 4072, Australia
- Wildlife Conservation Society, Global Conservation Programs, Bronx, NY, 10460, U.S.A
| | - Ben Collen
- Centre for Biodiversity and Environment Research, University College London, Gower Street, London, WC1 E6BT, U.K
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Huang C, Shih HT, Mao SY. Yuebeipotamon calciatile, a new genus and new species of freshwater crab from southern China (Crustacea, Decapoda, Brachyura, Potamidae). Zookeys 2016:61-72. [PMID: 27667941 PMCID: PMC5027778 DOI: 10.3897/zookeys.615.9964] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Accepted: 08/16/2016] [Indexed: 11/12/2022] Open
Abstract
A new genus and species of freshwater crab, Yuebeipotamon calciatile gen. n., sp. n., is described from southern China. While the carapace features are superficially similar to species of Sinopotamon Bott, 1967, Longpotamon Shih, Huang & Ng, 2016, and Tenuilapotamon Dai, Song, Li, Chen, Wang & Hu, 1984, the new genus possesses a distinctive combination of carapace, ambulatory leg, male thoracic sternal, male abdominal, and gonopodal characters that distinguish it from these and other genera. Molecular evidence derived from the mitochondrial 16S rDNA supports the establishment of a new genus.
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Affiliation(s)
- Chao Huang
- Palaeontology, Geobiology and Earth Archives Research Centre, School of Biological, Earth and Environmental Sciences, UNSW, Kensington, NSW 2052, Australia; Australian Museum, 6 College Street, Sydney, NSW 2010, Australia; School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China
| | - Hsi-Te Shih
- Department of Life Science, National Chung Hsing University, 250, Kuo Kuang Road, Taichung 402, Taiwan
| | - Si Ying Mao
- Palaeontology, Geobiology and Earth Archives Research Centre, School of Biological, Earth and Environmental Sciences, UNSW, Kensington, NSW 2052, Australia; School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China
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