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Acta Parasitologica

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Volume 62, Issue 2


Pseudopecoelus mccauleyi n. sp. and Podocotyle sp. (Digenea: Opecoelidae) from the deep waters off Oregon and British Columbia with an updated key to the species of Pseudopecoelus von Wicklen, 1946 and checklist of parasites from Lycodes cortezianus (Perciformes: Zoarcidae)

Charles K. Blend / Norman O. Dronen
  • Laboratory of Parasitology, Department of Wildlife and Fisheries Sciences, College of Agriculture and Life Sciences, Texas A&M University, 2258 TAMU, College Station, Texas 77843-2258, USA
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Gabor R. Racz
  • Harold W. Manter Laboratory of Parasitology, W529 Nebraska Hall, University of Nebraska-Lincoln, Lincoln, Nebraska 68588-0514, USA
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Scott L. Gardner
  • Harold W. Manter Laboratory of Parasitology, W529 Nebraska Hall, University of Nebraska-Lincoln, Lincoln, Nebraska 68588-0514, USA
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2017-04-18 | DOI: https://doi.org/10.1515/ap-2017-0031


Pseudopecoelus mccauleyi n. sp. (Opecoelidae: Opecoelinae) is described from the intestine of the bigfin eelpout, Lycodes cortezianus (Gilbert, 1890) (Perciformes: Zoarcidae), collected at 200–800 m depths in the Northeastern Pacific Ocean off Oregon and Vancouver Island, British Columbia. The new species is distinguished by possessing a unique combination of the following diagnostic characters: vitelline fields that extend to the posterior margin of the ventral sucker; a slender, tubular and sinuous seminal vesicle that extends some distance into the hindbody; an unspecialized, protuberant ventral sucker; a genital pore at pharynx level; lobed to deeply multilobed testes; a lobed ovary; and an egg size of 68–80 μm × 30–46 μm. A single specimen of Podocotyle Dujardin, 1845 (Digenea: Plagioporinae) is also described from the intestine of an individual Coryphaenoides sp. (Gadiformes: Macrouridae) collected at 2,800 m depth off Oregon. A listing of parasites from the bigfin eelpout as well as observations of parasite diversity within relevant hosts are offered, new host and locality records are noted, and a brief discussion of Pseudopecoelus von Wicklen, 1946 in the deep sea is presented taking note of the low level of host specificity recorded (i.e. spp. of Pseudopecoelus are now known to parasitize deep-water fish from at least 20 piscine families). A new dichotomous key to the 39 recognized species of Pseudopecoelus is introduced.

Keywords: British Columbia; Coryphaenoides sp.; Digenea; Key; Lycodes cortezianus; Macrouridae; Opecoelidae; Opecoelinae; Oregon; Plagioporinae; Podocotyle sp.; Pseudopecoelus mccauleyi n. sp.; Vancouver Island; Zoarcidae


  • Ahmad J. 1987. Two new opecoelid trematodes of fishes from the Bay of Bengal. Angewandte Parasitologie, 28, 27–31Google Scholar

  • Ahmad J. 1990. Four new opecoelid trematodes from marine fishes of Arabian Sea, off the Panjim Coast, Goa, India. Proceedings of Parasitology, 9, 49–63Google Scholar

  • Ahmad J., Dhar R.L. 1987. Studies on digenetic trematodes of marine fishes from the Puri coast of the Bay of Bengal. Part 53. Families Monorchiidae and Opecoelidae. Pakistan Journal of Zoology, 19, 167–184Google Scholar

  • Amin O.M. 1998. Marine flora and fauna of the eastern United States. Acanthocephala. NOAA Technical Report (National Marine Fisheries Service, Seattle), 135, 1–27Google Scholar

  • Arai H.P. 1967. A preliminary report on a study of the parasites of marine fishes of Burke Channel, British Columbia. MS Report, Fisheries Research Board of Canada, 925, 1–26Google Scholar

  • Arai H.P. 1969. Preliminary report on the parasites of certain marine fishes of British Columbia. Journal of the Fisheries Research Board of Canada, 26, 2319–2337. CrossrefGoogle Scholar

  • Arai H.P. 1989. Acanthocephala. In: (Eds. L. Margolis and Z. Kabata) Guide to the Parasites of Fishes of Canada. Part III. Canadian Special Publication of Fisheries and Aquatic Sciences 107, Ottawa, Canada, pp. 95Google Scholar

  • Bates R.M. 1990. A checklist of the Trypanorhyncha (Platyhelminthes: Cestoda) of the world (1935-1985). National Museum of Wales, Zoological Series, 1, 1–218Google Scholar

  • Blaylock R.B., Holmes J.C., Margolis L. 1998. The parasites of Pacific halibut (Hippoglossus stenolepis) in the eastern North Pacific: host-level influences. Canadian Journal of Zoology, 76, 536–547. CrossrefGoogle Scholar

  • Blend C.K., Dronen N.O. 2015. Description of a new species of Podocotyle Dujardin, 1845 (Digenea: Opecoelidae: Plagioporinae) from the cusk-eel, Luciobrotula corethromycter Cohen, 1964 (Ophidiiformes: Ophidiidae), from the Gulf of Mexico and Caribbean Sea. Acta Parasitologica, 60, 234–243. CrossrefGoogle Scholar

  • Blend C.K., Dronen N.O., Armstrong H.W. 2016. Podocotyle nimoyi n. sp. (Digenea: Opecoelidae: Plagioporinae) and a re-description of Podocotyle pearsei Manter, 1934 from five species of deep-sea macrourids from the Gulf of Mexico and Caribbean Sea. Zootaxa, 4117, 491–512. CrossrefGoogle Scholar

  • Blend C.K., Dronen N.O., Gardner S.L., Racz G.R., Armstrong H.W. 2012. The deep-sea fish digenean genus Tellervotrema Gibson & Bray, 1982 (Opecoelidae: Plagioporinae): Re-evaluation of the type species, T. armstrongi Gibson & Bray, 1982 and T. beringi (Mamaev, 1965). Zootaxa, 3295, 1–29Google Scholar

  • Bray R.A. 1987. Some helminth parasites of marine fishes of South Africa: family Opecoelidae (Digenea). Journal of Natural History, 21, 1049–1075. CrossrefGoogle Scholar

  • Bray R.A. 1990a. A review of the genus Parahemiurus Vaz & Pereira, 1930 (Digenea: Hemiuridae). Systematic Parasitology, 15, 1–21. CrossrefGoogle Scholar

  • Bray R.A. 1990b. A new species of Pseudopecoelus von Wicklen, 1946 (Digenea: Opecoelidae) from the orange roughy Hoplostethus atlanticus Collett, 1889 (Trachichthyidae) from off southeastern Australia. Systematic Parasitology, 16, 195–200. CrossrefGoogle Scholar

  • Bray R.A. 2004. The bathymetric distribution of the digenean parasites of deep-sea fishes. Folia Parasitologica, 51, 268–274. CrossrefGoogle Scholar

  • Bray R.A., Campbell R.A. 1996. New plagioporines (Digenea: Opecoelidae) from deep-sea fishes of the North Atlantic Ocean. Systematic Parasitology, 33, 101–113. CrossrefGoogle Scholar

  • Bray R.A., Justine J.-L. 2010. Pseudopecoelus sosoae sp. nov. and P. sewelli (Digenea, Opecoelidae) from the deep-sea fish Neoscombrops pacificus (Perciformes, Acropomatidae) off New Caledonia. Acta Parasitologica, 55, 45–52. CrossrefGoogle Scholar

  • Bush A.O., Lafferty K.D., Lotz J.M., Shostak A.W. 1997. Parasitology meets ecology on its own terms: Margolis et al. revisited. Journal of Parasitology, 83, 575–583. CrossrefGoogle Scholar

  • Caballero C.E., Caballero R.G. 1976. Estudio de la colección de tremátodos colectados por Howard A. Winter en peces del Océano Pacífico de México y de los Estados Unidos de Norte América. V. Revista de Biologia Tropical, 24, 191–198 (In Spanish)Google Scholar

  • Cribb T.H. 2005. Family Opecoelidae Ozaki, 1925. In: (Eds. A. Jones, R.A. Bray and D.I. Gibson) Keys to the Trematoda. Vol. 2. CABI Publishing and The Natural History Museum, Wallingford, 443–531Google Scholar

  • Dronen N.O., Blend C.K. 2015. Updated keys to the genera in the subfamilies of Cyclocoelidae Stossich, 1902, including a reconsideration of species assignments, species keys and the proposal of a new genus in Szidatitreminae Dronen, 2007. Zootaxa, 4053, 1–100. CrossrefGoogle Scholar

  • Dyer W.G., Williams E.H.Jr., Williams L.B. 1988. Pseudopecoelus sesokoensis sp. n. (Trematoda: Opecoelidae) from the intestine of Plectorhynchus pictus (Valenciennes) of Okinawa, Japan. Transactions of the Illinois Academy of Science, 81, 185–188Google Scholar

  • Eagle R.J., McCauley J.E. 1964. Collection of helminths from marine abyssal fishes. Journal of Parasitology (Abstract), 50, 37Google Scholar

  • Fischthal J.H., Thomas J.D. 1970. Digenetic trematodes of marine fishes from Ghana: Family Opecoelidae. Proceedings of the Helminthological Society of Washington, 37, 129–141Google Scholar

  • Froese R., Pauly D. (Eds). 2017. Accessed through: FishBase (version 06/2016) at http://www.fishbase.org on 17 January 2017

  • Gibson D.I. 1996. Trematoda. In: (Eds L. Margolis and Z. Kabata) Guide to the Parasites of Fishes of Canada. Part IV. Canadian Special Publication of Fisheries and Aquatic Sciences 124, Ottawa, Canada, pp. 373Google Scholar

  • Gibson D.I. 2014a. Podocotyle Dujardin, 1845. Accessed through: World Register of Marine Species (WoRMS) at http://www.marinespecies.org/aphia.php?p=taxdetails&id=108540 on 10 November 2016

  • Gibson D.I. 2014b. Pseudopecoelus von Wicklen, 1946. Accessed through: World Register of Marine Species (WoRMS) at http://www.marine-species.org/aphia.php?p=taxdetails$id=393678 on 18 January 2017

  • Gupta N.K., Sayal A. 1979. Digenetic trematodes of marine fishes from Laccadive Islands (Arabian Sea) and Goa (India). Folia Parasitologica, 26, 221–229Google Scholar

  • Hanson M.L. 1950. Some digenetic trematodes of marine fishes of Bermuda. Proceedings of the Helminthological Society of Washington, 17, 74–89Google Scholar

  • Hanson M.L. 1955. Some digenetic trematodes of plectognath fishes of Hawaii. Proceedings of the Helminthological Society of Washington, 22, 75–87Google Scholar

  • Kruse G.O.W. 1977. Some digenetic trematodes from fishes of the Bering Sea with the descriptions of Prosorhynchus mizellei sp. n. (Bucephalidae) and Pseudopecoelus nossamani sp. n. (Opecoelidae). Proceedings of the Helminthological Society of Washington, 44, 73–76Google Scholar

  • Kuramochi T. 2001. Digenean trematodes of anguilliform and gadiform fishes from deep-sea areas of Tosa Bay, Japan. In: (Eds. T. Fujita, H. Saito and M. Takeda) Deep-sea fauna and pollutants in Tosa Bay. National Science Museum Monographs, Tokyo, 20, 19–30Google Scholar

  • Love M.S., Moser M. 1976. Parasites of California Marine and Estuarine Fish. University of California, Santa Barbara, California, USA, pp. 517Google Scholar

  • Love M.S., Moser M. 1983. A Checklist of Parasites of California, Oregon, and Washington Marine and Estuarine Fishes. U.S. Department of Commerce, National Oceanic and Atmospheric Administration, Seattle, Washington, USA, pp. 576Google Scholar

  • MacCallum G.A. 1921. Studies in helminthology: Part 1, trematodes; Part 2, cestodes; Part 3, nematodes. Zoopathologica, 1, 135– 284Google Scholar

  • Machida M., Araki J. 2002. Three new species of digenean trematodes found in deep-sea fishes of Japan and adjacent waters. Bulletin of the National Science Museum, Tokyo, Series A, Zoology, 24, 195–200Google Scholar

  • Machida M., Kamegai S. 1997. Digenean trematodes from deep-sea fishes of Suruga Bay, central Japan. National Science Museum Monographs, 12, 19–30Google Scholar

  • Madhavi R., Lakshmi T.T. 2010. A new opecoelid trematode, Pseudopecoelus brayi sp. nov. from the shoulderbar soldierfish, Myripristis kuntee off Visakhapatnam coast, Bay of Bengal. Acta Parasitologica, 55, 235–239. CrossrefGoogle Scholar

  • Manter H.W. 1934. Some digenetic trematodes from deep-water fish of Tortugas, Florida. Papers from Tortugas Laboratory, 28, 257–345Google Scholar

  • Manter H.W. 1947. The digenetic trematodes of marine fishes of Tortugas, Florida. American Midland Naturalist, 38, 257–416. CrossrefGoogle Scholar

  • Manter H.W. 1954. Some digenetic trematodes from fishes of New Zealand. Transactions of the Royal Society of New Zealand, 82, 475–568Google Scholar

  • Manter H.W., van Cleave H.J. 1951. Some digenetic trematodes, including eight new species, from marine fishes of La Jolla, California. Proceedings of the United States Natural History Museum, 101, 315–340. CrossrefGoogle Scholar

  • Margolis L., Arthur J.R. 1979. Synopsis of the parasites of fishes of Canada. Bulletin of the Fisheries Research Board of Canada, 199, 1–269Google Scholar

  • McCauley J.E. 1964. A deep-sea digenetic trematode. Journal of Parasitology, 50, 112–114. CrossrefGoogle Scholar

  • McCauley J.E. 1968. Six species of Lepidapedon Stafford, 1904 (Trematoda: Lepocreadiidae) from deep-sea fishes. Journal of Parasitology, 54, 496–505. CrossrefGoogle Scholar

  • McCauley J.E., Pequegnat J.E. 1968. Two new species of Dinosoma Manter, 1934 (Trematoda: Hemiuridae) from deepwater macrourid fishes off the coast of Oregon. Journal of Parasitology, 54, 931–934. CrossrefGoogle Scholar

  • Nahhas F.M., Cable R.M. 1964. Digenetic and aspidogastrid trematodes from marine fishes of Curaçao and Jamaica. Tulane Studies in Zoology, 11, 169–228. CrossrefGoogle Scholar

  • Noble E.R., Collard S.B. 1970. The parasites of midwater fishes. In: (Ed. S.F. Snieszko) A Symposium on Diseases of Fishes and Shellfishes. Special Publication No. 5, American Fisheries Society, Washington D.C., 57–68Google Scholar

  • Overstreet R.M. 1969. Digenetic trematodes of marine teleost fishes from Biscayne Bay, Florida. Tulane Studies in Zoology, 15, 119–176Google Scholar

  • Overstreet R.M., Martin D.M. 1974. Some digenetic trematodes from synaphobranchid eels. Journal of Parasitology, 60, 80–84. CrossrefGoogle Scholar

  • Parukhin A.M. 1976a. Trematodes of fish in the Indian Ocean. Biologia Moria, Kiev, 38, 76–84. (In Russian)Google Scholar

  • Parukhin A.M. 1976b. Parasitic worms of food fishes in the southern seas. Naukova Dumka, Kiev, Ukraine, pp. 183. (In Russian)Google Scholar

  • Parukhin A.M. 1978. On studies in trematodofauna of the Indian and Atlantic Ocean fishes. Biologia Moria, Kiev, 45, 90–99. (In Russian)Google Scholar

  • Parukhin A.M. 1983. New species of trematodes from commercial fishes of the Indian Ocean. Zoologichesky Zhurnal, 62, 1106–1108. (In Russian)Google Scholar

  • Pritchard M.H. 1966. Studies on digenetic trematodes of Hawaiian fishes: Family Opecoelidae Ozaki, 1925. Zoologischer Jahrbücher, Systematik, 93, 173–202Google Scholar

  • Prudhoe S., Bray R.A. 1973. Digenetic trematodes from fishes. B.A.N.Z.A.R.E. Reports, Series B, 8, 195–225Google Scholar

  • Reimer L.W. 1987. Opecoelidae (Trematoda) von Meeresfischen vor Moçombique. Angewandte Parasitologie, 28, 143–158Google Scholar

  • Shen J.W. 1990. Digenetic Trematodes of Marine Fishes from Hainan Island. Science Press, Beijing, China, pp. 228Google Scholar

  • Sogandares-Bernal F., Hutton R.F. 1959. Studies on helminth parasites from the coast of Florida. IV. Digenetic trematodes of marine fishes of Tampa, Boca Ciega Bays, and the Gulf of Mexico. Quarterly Journal of the Florida Academy of Sciences, 21, 259–273Google Scholar

  • von Wicklen J.H. 1946. The trematode genus Opecoeloides and related genera, with a description of Opecoeloides polynemi n. sp. Journal of Parasitology, 32, 156–163. CrossrefGoogle Scholar

  • Wang P. 1982. Some digenetic trematodes of marine fishes from Fujian Province, China. Oceanologia et Limnologia Sinica, 13, 179–194. (in Chinese)Google Scholar

  • Yamaguti S. 1938. Studies on the Helminth Fauna of Japan. Part 21. Trematodes of Fishes. IV.S. Yamaguti, Kyôto, Japan, pp. 139Google Scholar

  • Yamaguti S. 1958. Systema Helminthum. Vol. 1. The Digenetic Trematodes of Vertebrates. Part 1. Interscience Publishers, New York, New York, USA, pp. 979Google Scholar

  • Yamaguti S. 1970. Digenetic Trematodes of Hawaiian Fishes, Keigaku Publishing, Tokyo, Japan, pp. 436Google Scholar

  • Yamaguti S. 1971. Synopsis of Digenetic Trematodes of Vertebrates, Vol. 1. Keigaku Publishing, Tokyo, Japan, pp. 1074Google Scholar

About the article

Received: 2016-11-10

Revised: 2017-01-26

Accepted: 2017-02-09

Published Online: 2017-04-18

Published in Print: 2017-06-01

Citation Information: Acta Parasitologica, Volume 62, Issue 2, Pages 231–254, ISSN (Online) 1896-1851, ISSN (Print) 1230-2821, DOI: https://doi.org/10.1515/ap-2017-0031.

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