NARMS taxon details

Neoergasilus japonicus (Harada, 1930)

128829 (urn:lsid:marinespecies.org:taxname:128829)

accepted
Species
marine, brackish, fresh, terrestrial
(of ) Harada, I. (1930). Studies on freshwater fauna of Formosa (I). A new copepod species parasitic on Formosan fresh-water fishes. Journal of the Society of Tropical Agriculture 2(1):71-76, figs. 1-2, pl. 1. (ix-1930) (Reprinted in: Contributions from the Zoological laboratory, Taihoku Imperial University, Formosa) [details] Available for editors  PDF available
Walter, T.C.; Boxshall, G. (2021). World of Copepods database. Neoergasilus japonicus (Harada, 1930). Accessed through: Costello, M.J.; Bouchet, P.; Boxshall, G.; Arvanitidis, C.; Appeltans, W. (2021) European Register of Marine Species at: https://www.marbef.org/data/aphia.php?p=taxdetails&id=128829 on 2026-08-28
Costello, M.J.; Bouchet, P.; Boxshall, G.; Arvanitidis, C.; Appeltans, W. (2026). European Register of Marine Species. Neoergasilus japonicus (Harada, 1930). Accessed at: https://www.vliz.be/vmdcdata/narms/narms.php?p=taxdetails&id=128829 on 2026-08-28
Date
action
by
2004-12-21 15:54:05Z
created

original description (of ) Harada, I. (1930). Studies on freshwater fauna of Formosa (I). A new copepod species parasitic on Formosan fresh-water fishes. Journal of the Society of Tropical Agriculture 2(1):71-76, figs. 1-2, pl. 1. (ix-1930) (Reprinted in: Contributions from the Zoological laboratory, Taihoku Imperial University, Formosa) [details] Available for editors  PDF available

basis of record Boxshall, G. (2001). Copepoda (excl. Harpacticoida), <B><I>in</I></B>: Costello, M.J. <i>et al.</i> (Ed.) (2001). <i>European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels,</i> 50: pp. 252-268 (look up in IMIS) [details] 

additional source Abdelhalim, A.I., J.W. Lewis & G.A. Boxshall. (1993). The external morphology of adult female ergasilid copepods (Copepoda: Poecilostomatoida): a comparison between Ergasilus and Neoergasilus. <em>Systematic Parasitology.</em> 24: 45-52., available online at https://doi.org/10.1007/bf00006944 [details] Available for editors  PDF available

additional source Alekseev, V.R., C. Cuoc, D. Jamet, J.L. Jamet & R. Chappaz. (2021). Biological Invasion of Fish Parasite Neoergasilus japonicus (Harada, 1930) (Copepoda: Ergasilidae) in Lake Grand Laoucien, France: A Field Study on Life Cycle Parameters and Reasons for Unusual High Population Density. <em>Life-Basel.</em> 11(10):1-18. Oct 2021., available online at https://doi.org/10.3390/life11101100 [details] Available for editors  PDF available

additional source Alfonso, G. & G. Belmonte. (2010). Neoergasilus japonicus (Harada, 1930): a new non-indigenous species for the Italian Fauna. Italian Journal of Zoology 77(2):172-178., available online at https://doi.org/10.1080/11250001003591783 [details] Available for editors  PDF available

additional source Avenant-Oldewage, A., K. Nagasawa, Q.M. Dos Santos & W.H. Oldewage. (2023). Pathology caused by introduced Neoergasilus japonicus (Copepoda: Ergasilidae) to the skin of indigenous Tilapia sparrmanii in South Africa and scanning electron microscopy study of wound-inflicting structures. <em>Journal Of Fish Diseases.</em> 46(12): 1-10.Oct 2023., available online at https://doi.org/10.1111/jfd.13867 [details] Available for editors  PDF available

additional source Baud, A., C. Cuoc, J. Grey, R. Chappaz & V. Alekseev. (2004). Seasonal variability in the gut ultrastructure of the parasitic copepod Neoergasilus japonicus (Copepoda, Poecilostomatoida). Canadian Journal of Zoology 82(10):1655-1666., available online at https://doi.org/10.1139/z04-149 [details] Available for editors  PDF available

additional source Berrouk, H., M. Tolba, M. Touarfia & C. Boualleg. (2019). A study of parasitic copepod infesting two freshwater fish populations (Cyprinus carpio and Abramis brama) from Beni-Haroun Dam (Mila) North-East of Algeria. <em>Annual Research and Review in Biology.</em> 34(3): 1-11., available online at https://doi.org/10.9734/ARRB/2019/v34i330159 [details] Available for editors  PDF available

additional source Boucenna, I., N. Khelifi, C. Boualleg, A. Allalgua, M. Bensouilah & N. Kaouachi. (2018). L'Infestation de Luciobarbus callensis (Cyprinides) par les copepodes parasites dans le barrage Foum El Khanga (Souk-Ahras, Algerie). [Infestation of Luciobarbus callensis (Cyprinidae) by parasitic copepods at the reservoir of Foum El Khanga (Souk-Ahras, Algeria). ]. <em>Bulletin de la Societe Zoologique de France.</em> 143(4):199-212. [details] Available for editors  PDF available

additional source Cabrera Soregui, M.A. (2019). Identificación y caracterización ultraestructural de monogeneos presentes en las branquias de tilapia del Nilo Oreochromis niloticus asociados a las lesiones histológicas procedentes de cultivos de la provincia de San Martín. [Identification and Ultrastructural Characterization of Monogeneans Present on the Gills of Nile Tilapia (Oreochromis niloticus) Associated with Histological Lesions from Aquaculture Farms in the Province of San Martín.]. <em>Tesis de Maestría, Escuela de Posgrado, Universidad Peruana Cayetano Heredia, Lima, Peru.</em> 101 pp. [In Spanish]., available online at https://hdl.handle.net/20.500.12866/7675 [details] Available for editors  PDF available

additional source Canayaz, E., M. Tektas & E. Soylu. (2018). Evaluation of Neoergasilus japonicus (Ergasilidae) Occurrence on Rudd Scardinius erythrophthalmus Using Fuzzy Logic Approach. <em>Journal of Science and Technology, Fen Bilimleri Enstitüsü Dergisi, Turkey.</em> 11(2), 277-284., available online at https://doi.org/10.18185/erzifbed.402969 [details] Available for editors  PDF available

additional source Gusev, A.V. (1987). Class Crustacea Lamarck, 1801. <em>In: Bauer, O.N. (ed.). Opredelitel' parazitov presnovodnykh ryb SSSR. [Key to the Parasites of Freshwater Fishes of the USSR.] Opredeliteli po Faune SSSR, Zoologicheskii Instituta SSSR. Nauka, Leningrad.</em> 3(149):378-432. [details] Available for editors  PDF available

additional source Hanek, J. (1968). The finding of Neoergasilus japonicus (Harada, 1930) (Copepoda: Ergasilidae) in Europe. Folia Parasitologica 15(3):277-278. [details] Available for editors  PDF available

additional source Hayden, K.J. & W.A. Rogers. (1998). Neoergasilus japonicus (Poecilostomatoida: Ergasilidae), a parasitic copepod new to North America. Journal of Parasitology 84(1):88-93. (ii.1998), available online at https://doi.org/10.2307/3284535 [details] Available for editors  PDF available

additional source Holynska, M., M. Swislocka-Cutter, C. López & M. Karpowicz. (2025). Freshwater cyclopids (Crustacea: Copepoda) ?rst recorded in South America – arguments for and against their non-native status. <em>The European Zoological Journal.</em> 92(1): 631-659., available online at https://doi.org/10.1080/24750263.2025.2503319 [details] Available for editors  PDF available

additional source Hudson, P.L. & C.A. Bowen II. (2002). First record of Neoergasilus japonicus (Poecilostomatoida: Ergasilidae), a parasitic copepod new to the laurentian Great Lakes. Journal of Parasitology 88(4): 657-663., available online at https://doi.org/10.1645/0022-3395(2002)088[0657:fronjp]2.0.co;2 [details] Available for editors  PDF available

additional source Katahira, H., O. Ikeda & T. Yodo. (2023). An Outbreak of Neoergasilus japonicus (Copepoda: Ergasilidae) on the Japanese Rice Fish Oryzias latipes Reared in an Outdoor Tank. <em>Fish Pathology.</em> 58(4):171-174. Dec 2023., available online at https://doi.org/10.3147/jsfp.58.171 [details] Available for editors  PDF available

additional source Kim, I.H. & S.K. Choi. (2003). Copepod parasites (Crustacea) of freshwater fishes in Korea. Korean Journal of Systematic Zoology 19(1):57-93. [details] Available for editors  PDF available

additional source Kim, I.H. (2014). Arthropoda, Maxillopoda, Copepoda, Cyclopoida : Fish-Parasitic Cyclopoid Copepods. <em>Invertebrate Fauna of Korea, National Institute of Biological Resources, Ministry of Environment(Korea).</em> 21(37):226 pp. [details] Available for editors  PDF available

additional source Knopf, K. & F. Hölker. (2005). First report of Philometra obturans (Nematoda) and Neoergasilus japonicus (Copepoda) in Germany. <em>Acta Parasitologica.</em> 50(3):261-262. [details] Available for editors  PDF available

additional source Kuang, P.R. & J.H. Qian. (1991). Parasitic Crustacea of Freshwater Fishes. Economic Fauna of China. Editorial Committee of Fauna Sinica, Academia Sinica, Science Press, Beijing 203pp. (In Chinese.) [details] Available for editors  PDF available

additional source Kumari, P.S., R. Madhavi & R. Ramakrishna. (2009). Neoergasilus japonicus (Harada) (Poecilostomatoida: Ergasilidae). A parasitic copepod new to India. Indian Journal of Fisheries 56(4):287-291. [details] Available for editors  PDF available

additional source Kvach, Y., M.Y. Tkachenko, M. Seifertova & M. Ondrackova. (2021). Insights into the diversity, distribution and phylogeny of three ergasilid copepods (Hexanauplia: Ergasilidae) in lentic water bodies of the Morava river basin, Czech Republic. <em>Limnologica.</em> 91:1-8. 125922. Nov 2021., available online at https://doi.org/10.1016/j.limno.2021.125922 [details] Available for editors  PDF available

additional source Marshall, C.C. (2024). Overlooked and understudied: A survey of the small and hidden freshwater invertebrate taxa (Phylum Rotifera and Subphylum Crustacea). <em>M.Sc. Thesis, Cornell University, Ithaca, New York, USA.</em> 82 pp., available online at https://doi.org/10.7298/4mbc-y867 [details] Available for editors  PDF available

additional source Marshall, C.C., P.L. Hudson, J.R. Jackson & L.G. Rudstam. (2019). First record of the non-indigenous parasitic copepod Neoergasilus japonicus (Harada, 1930) in the Lake Ontario Watershed: Oneida Lake, New York. <em>Journal of Great Lakes Research.</em> 45(6):1348-1353., available online at https://doi.org/10.1016/j.jglr.2019.09.017 [details] Available for editors  PDF available

additional source Mendes Marques, T. & G.A. Murrieta Morey. (2018). First record of Neoergasilus japonicas (Harada, 1930) (Copepoda: Cyclopoida) infecting a fish species in South America. <em>Folia Amazónica.</em> 27(1):111-117., available online at https://doi.org/10.24841/fa.v27i1.460 [details] Available for editors  PDF available

additional source Mi´c, R., I. Hodová, A. Simková, M. Benovics, R. Sanda, J. Vukic & M. Seifertová. (2025). Diversity and phylogeny of parasitic copepods of freshwater fishes from the Mediterranean and the Middle East. <em>Parasitology.</em> 152(8):1-28., available online at 10.1017/ S0031182025100814 [details] Available for editors  PDF available

additional source Mirzaei, M., H. Khovand & R. Kheirandish. (2016). The prevalence of non-indigenous parasitic copepod (Neoergasilus japonicus) spreads with fishes of pet trade in Kerman, Iran. Journal of Parasitic Diseases, 40(4):1283-1288. [details] Available for editors  PDF available

additional source Mokonyane, M.P. (2020). Diversity of freshwater fish parasites and water quality of the Kwena Dam, Mpumalanga Province, South Africa. <em>M.Sc .Thesis, Faculty of Science and Agriculture, University of Limpopo, Mankweng, South Africa.</em> 139 pp. [details] Available for editors  PDF available

additional source Mugridge, R.E.R., H.G. Stallybrass & A. Hollman. (1982). Neoergasilus japonicus (Crustacea: Ergasilidae). A parasitic copepod new to Britain. Journal of Zoology, London 197(4):551-557. (1-viii-1982)., available online at https://doi.org/10.1111/jzo.1982.197.4.551 [details] Available for editors  PDF available

additional source Nagasawa, K. & A. Inoue. (2012). Variations in the infection level of Neoergasilus japonicus (Copepoda: Ergasilidae) between freshwater fishes at different sites in the Ashida River system, western Japan. Zoosymposia, 8:106–116, available online at https://doi.org/10.11646/zoosymposia.8.1.13 [details] Available for editors  PDF available

additional source Nagasawa, K. & D. Uyeno. (2012). Utilization of alien freshwater fishes by the parasitic copepod Neoergasilus japonicus (Ergasilidae) on Okinawa-jima Island, Japan, with a list of its known hosts. Zoosymposia, 8:81–96 , available online at https://doi.org/10.11646/zoosymposia.8.1.11 [details] Available for editors  PDF available

additional source Nagasawa, K. & H. Sato. (2015). Neoergasilus japonicus (Copepoda: Ergasilidae) parasitic on two alien freshwater fishes (Lepomis macrochirus and Micropterus salmoides) in central Japan, with its new record from Gunma Prefecture. Bulletin of Gunma Museum of Natural History, 19:1-4. [details] Available for editors  PDF available

additional source Nagasawa, K. & M. Obe. (2013). Spatial distribution of Neoergasilus japonicus (Copepoda: Ergasilidae) on the fins of bluegill (Lepomis macrochirus). <em>In: Suárez-Morales, E., J.W. Reid, G.A. Boxshall, J.S. Hwang & R. Huys (eds.). Selected papers presented at the 11th International Conference on Copepoda (Mérida, Mexico, 10–15 July 2011), Journal of Natural History.</em> 47(5-12):543-552. (published online 2012)., available online at https://doi.org/10.1080/00222933.2012.747635 [details] Available for editors  PDF available

additional source Nagasawa, K. & M. Obe. (2015). The ergasilid copepod Neoergasilus japonicus infecting smallmouth bass Micropterus dolomieu in central Japan. <em>Journal of the Graduate School of Biosphere Science, Hiroshima University.</em> 54:65-69. [details] Available for editors  PDF available

additional source Nagasawa, K., H. Sato, and M. Nitta (2014). The parasitic copepod Neoergasilus japonicus (Ergasilidae) from a new host Candidia sieboldii (Cyprinidae) <i>Biogeography</i>. 16:47-48 [details] Available for editors  PDF available

additional source Ondrackova, M., J. Fojtu, M. Seifertova, Y. Kvach & P. Jurajda. (2019). Non-native parasitic copepod Neoergasilus japonicus (Harada, 1930) utilizes non-native fish host Lepomis gibbosus (L.) in the floodplain of the River Dyje (Danube basin). Parasitology Research, 118(1):57-62., available online at https://doi.org/10.1007/s00436-018-6114-1 [details] Available for editors  PDF available

additional source Ondracková, M., M.Y. Tkachenko, L. Vetesník, J. Hronek & M. Janác. (2024). Distribution and host range of a highly invasive parasitic copepod. <em>Hydrobiologia.</em> 851(14):1-20. Jun 2024., available online at https://doi.org/10.1007/s10750-024-05577-4 [details] Available for editors  PDF available

additional source Prieto, A., E. Fajer & M. Vinjoy. (1985). Neoergasilus japonicus (Copepoda: Ergasilidae) en peces en cultivo intensivo en Cuba. [Neoergasilus japonicus (Copepoda: Ergasilidae) in intensively farmed fish in Cuba.]. <em>Revista de Salud Animal.</em> 7(4):407-410. [details] Available for editors  PDF available

additional source Soylu, E. & M.P. Soylu. (2012). First record of the nonindigenous parasitic copepod Neoergasilus japonicus (Harada, 1930) in Turkey. Turkish Journal of Zoology 36(5):662-667., available online at https://doi.org/10.3906/zoo-1101-92 [details] Available for editors  PDF available

additional source Suárez-Morales, E. & N.F. Mercado-Salas. (2013). The non-indigenous parasitic copepod Neoergasilus japonicus (Harada) (Cyclopoida) from central Mexico: the earliest invasion in continental America. <em>BioInvasions Records.</em> 2(3):201-206., available online at https://doi.org/10.3391/bir.2013.2.3.05 [details] Available for editors  PDF available

additional source Suárez-Morales, E., A. Paredes-Trujillo & D. González-Solís. (2010). The introduced Asian parasitic copepod Neoergasilus japonicus (Harada) (Cyclopoida: Ergasilidae) from endangered cichlid teleosts in Mexico. <em>Zoological Science.</em> 27(11):851-855., available online at https://doi.org/10.2108/zsj.27.851 [details] Available for editors  PDF available

additional source Tkachenko, M.Y., M. Hnilicka, M. Janác, Y. Kvach, Y.L. Vetesník & M. Ondracková. (2025). Shift in parasite load in native and non-native Eupercarian fish species living in sympatry. <em>Neobiota.</em> 102:151-171. Oct 2025., available online at https://doi.org/10.3897/neobiota.102.148301 [details] Available for editors  PDF available

additional source Truong, T.N. (2011). Catfish (Ictalurus punctatus), Blue Catfish (Ictalurus furcatus), and C×B Hybrid Catfish (Female Ictalurus punctatus × Male Ictalurus furcatus) in Earthen Pond Aquaculture. <em>M.Sc. Thesis, Auburn University, Auburn, Alabama, USA.</em> 171 pp., available online at http://hdl.handle.net/10415/2766   [details] Available for editors  PDF available

additional source Tuuha, H., E.V. Tellervo & J. Taskinen. (1992). Ergasilid copepods as parasites of perch Perca fluviatilis and roach Rutilus rutilus in central Finland: seasonality, maturity and environmental influence. <em>Journal of Zoology, London.</em> 228(3):405-422, figs, 1-6., available online at https://doi.org/10.1111/j.1469-7998.1992.tb04444.x [details] Available for editors  PDF available

additional source Urawa, S., K. Muroga & S. Kasahara. (1980). Naupliar development of Neoergasilus japonicus (Copepoda: Ergasilidae). Bulletin of the Japanese Society of Scientific Fisheries (= Nippon Suisan Gakkaishi) 46(8):941-947. (viii-1980), available online at https://doi.org/10.2331/suisan.46.941 [details] Available for editors  PDF available

additional source Urawa, S., K. Muroga & S. Kasahara. (1980). Studies on Neoergasilus japonicus (Copepoda: Ergasilidae), a parasite of freshwater fishes - II. Development in copepodid stage. <em>Journal of the Faculty of Applied Biological Science, Hiroshima University.</em> 19(1):21-38. [details] Available for editors  PDF available

additional source Urawa, S., K. Muroga & S. Kasahara. (1991). Growth and fecundity of the parasitic copepod Neoergasilus japonicus (Ergasilidae). In: Uye, S.I., S. Nishida & J.S. Ho (eds.). Proceedings of the Fourth International Conference on Copepoda. Bulletin of Plankton Society of Japan, Special Volume: special vol.:619-625. [details] Available for editors  PDF available

additional source Valtonen, E.T., J.C. Holmes & M. Koskivaara. (1997). Eutrophication, pollution, and fragmentation: Effects on parasite communities in roach (Rutilus rutilus) and perch (Perca fluviatilis) in four lakes in central Finland. <em>Canadian Journal of Fisheries and Aquatic Sciences.</em> 54(3):572 585., available online at https://doi.org/10.1139/f96-306 [details] Available for editors  PDF available

additional source Velázquez-Ornelas, K.. & E. Suárez-Morales. (2022). Tres nuevos hospederos para elparásito Neoergasilus japonicus(Harada, 1930) (Copepoda, Cyclopoida) enuna laguna del occidente de México. [Three new hosts for the parasite Neoergasilus japonicus(Harada, 1930) (Copepoda, Cyclopoida) in a lagoon of western Mexico.]. <em>Investigación y Ciencia de la Universidad Autónoma de Aguascalientes,.</em> 30(85):1-11. e3314., available online at https://doi.org/10.33064/iycuaa2022853314 [details] Available for editors  PDF available

additional source Velázquez-Ornelas, K.E. (2019). Taxonomía, distribución y aspectos ecológicos de los copépodos (Crustacea: Copepoda) de charcas temporales del estado de Jalisco. [Taxonomy, distribution and ecological aspects of the copepods (Crustacea: Copepoda) from temporary ponds in the state of Jalisco.]. <em>Tesis de Maestría, Centro Universitario de Ciencias Biológicas y Agropecuarias, Universidad de Guadalajara, Zapopan, Jalisco, Mexico.</em> 216 pp. [In Spanish; English abstract]. [details] Available for editors  PDF available

additional source Velázquez-Ornelas, K.E., E. Juárez Carrillo & M. Ayón-Parente. (2021). Zooplancton (Cladocera y Copepoda) de la laguna de Cajititlán. [Zooplankton (Cladocera and Copepoda) in Cajititlán Lagoon.]. <em>e-CUCBA.</em> 8(16):12-20., available online at https://doi.org/10.32870/ecucba.vi16.193  [details] Available for editors  PDF available

additional source von Nordmann, A. (1832). Mikrographische Beiträge zur Naturgeschichte der wirbellosen Thiere. [Micrographic contributions to the natural history of invertebrates.]. <em>Zweites Heft. Mit zehn Kupfertafeln, G. Reimer, Berlin.</em> XVIII:1-150, plates I-X., available online at https://archive.org/details/mikrographische00nordgoog [details] OpenAccess publication

additional source Yin, W.Y. (1962). [Parasitic copepods and Branchiura of fresh-water fishes from north-east China and Inner Mongolia.]. <em>Acta Hydrobiologica Sinica / Shuisheng Shengwu Xuebao.</em> 9(1):31-46, figs. 1-8, pl. 1. (ix-1962, Chinese with English summary). [details] Available for editors  PDF available

new combination reference Yin, W.Y. (1956). [Studies on the Ergasilidae (parasitic Copepoda) from the fresh-water fishes of China.]. <em>Acta Hydrobiologica Sinica / Shuisheng Shengwu Xuebao.</em> 2:209-270, pls. 1-18. (Chinese with English summary). [details] Available for editors  PDF available
 
 Present  Inaccurate  Introduced: alien  Containing type locality 
   

    Definitions

Loading...