Accessible Requires Authentication Published by De Gruyter April 18, 2017

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, Gabor R. Racz and Scott L. Gardner
From the journal Acta Parasitologica

Abstract

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 Pseudopecoelusvon 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.

Acknowledgements

We are grateful to the two anonymous reviewers; their comments were found to be quite helpful. We also acknowledge the foresight of the late Dr. James E. McCauley, Dept. of Oceanography, Oregon State Univ., Corvallis, Oregon, USA, for collecting and depositing this material. We thank Drs. Rodney Bray, David I. Gibson and Mrs. Eileen Harris, Parasitic Worms Group, BMNH, for the loan of paratypes of the new species that had been housed in the BMNH; these were deposited by Dr. Hisao P. Arai (Dept. of Biology, Univ. of Calgary, Alberta, Canada). We are grateful to Drs. Anna Phillips and Chad Walter, Dept. of Invertebrate Zoology, Smithsonian Museum of Natural History, for the loan of the holotype of P. nossamani, and we also thank the HWML for supporting this work. Dr. Mark Pokras, Wildlife Clinic, Cummings School of Veterinary Medicine, and the Tisch Library, Tufts University, North Grafton and Medford, Massachusetts, kindly continues to allow CKB access to and continued use of the on-line literature databases at Tufts. We acknowledge the efforts of the Interlibrary Loan Division of the Evans Library, Texas A&M University, College Station, Texas, for helping NOD obtain needed literature. Continued thanks go to Gordon College, Wenham, Massachusetts, for the extended loan of microscopes and other equipment to CKB. This study was completed and funded as part of a sabbatical approved for CKB by the Faculty Development Committee, Gordon College, and through an NSF grant (# DBI-0646356) awarded to SLG.

References

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

Ahmad J. 1990. Four new opecoelid trematodes from marine fishes of Arabian Sea, off the Panjim Coast, Goa, India. Proceedings of Parasitology, 9, 49–63 Search in Google 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, 167–184 Search in Google Scholar

Amin O.M. 1998. Marine flora and fauna of the eastern United States. Acanthocephala. NOAA Technical Report (National Marine Fisheries Service, Seattle), 135, 1–27 Search in Google 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, 1–26 Search in Google 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. 10.1139/f69-226 Search in Google 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. 95 Search in Google Scholar

Bates R.M. 1990. A checklist of the Trypanorhyncha (Platyhelminthes: Cestoda) of the world (1935-1985). National Museum of Wales, Zoological Series, 1, 1–218 Search in Google 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. 10.1139/z97-214 Search in Google 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. 10.1515/ap-2015-0033 Search in Google 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. 10.11646/zootaxa.4117.4.3 Search in Google 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, 1–29 Search in Google Scholar

Bray R.A. 1987. Some helminth parasites of marine fishes of South Africa: family Opecoelidae (Digenea). Journal of Natural History, 21, 1049–1075. 10.1080/00222938700770651 Search in Google Scholar

Bray R.A. 1990a. A review of the genus Parahemiurus Vaz & Pereira, 1930 (Digenea: Hemiuridae). Systematic Parasitology, 15, 1–21. 10.1007/bf00009914 Search in Google 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. 10.1007/bf00009147 Search in Google Scholar

Bray R.A. 2004. The bathymetric distribution of the digenean parasites of deep-sea fishes. Folia Parasitologica, 51, 268–274. 10.14411/fp.2004.032 Search in Google 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. 10.1007/BF00009426 Search in Google 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. 10.2478/s11686-010-0004-8 Search in Google 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. 10.2307/3284227 Search in Google 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) Search in 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, 443–531 Search in Google 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. 10.11646/zootaxa. 4053.1.1 Search in Google 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, 185–188 Search in Google Scholar

Eagle R.J., McCauley J.E. 1964. Collection of helminths from marine abyssal fishes. Journal of Parasitology (Abstract), 50, 37 Search in Google 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, 129–141 Search in Google Scholar

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

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. 373 Search in Google 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 Search in Google Scholar

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 Search in Google Scholar

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

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

Hanson M.L. 1955. Some digenetic trematodes of plectognath fishes of Hawaii. Proceedings of the Helminthological Society of Washington, 22, 75–87 Search in Google 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, 73–76 Search in Google 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, 19–30 Search in Google Scholar

Love M.S., Moser M. 1976. Parasites of California Marine and Estuarine Fish. University of California, Santa Barbara, California, USA, pp. 517 Search in Google 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. 576 Search in Google Scholar

MacCallum G.A. 1921. Studies in helminthology: Part 1, trematodes; Part 2, cestodes; Part 3, nematodes. Zoopathologica, 1, 135– 284 Search in Google 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, 195–200 Search in Google Scholar

Machida M., Kamegai S. 1997. Digenean trematodes from deep-sea fishes of Suruga Bay, central Japan. National Science Museum Monographs, 12, 19–30 Search in Google 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. 10.2478/s11686-010-0034-2 Search in Google Scholar

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

Manter H.W. 1947. The digenetic trematodes of marine fishes of Tortugas, Florida. American Midland Naturalist, 38, 257–416. 10.2307/2421571 Search in Google Scholar

Manter H.W. 1954. Some digenetic trematodes from fishes of New Zealand. Transactions of the Royal Society of New Zealand, 82, 475–568 Search in Google 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. 10.5479/si.00963801.101-3279.315 Search in Google Scholar

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

McCauley J.E. 1964. A deep-sea digenetic trematode. Journal of Parasitology, 50, 112–114. 10.2307/3276042 Search in Google Scholar

McCauley J.E. 1968. Six species of Lepidapedon Stafford, 1904 (Trematoda: Lepocreadiidae) from deep-sea fishes. Journal of Parasitology, 54, 496–505. 10.2307/3277071 Search in Google 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. 10.2307/3277122 Search in Google 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. 10.5962/bhl.part.7052 Search in Google 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., 57–68 Search in Google Scholar

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

Overstreet R.M., Martin D.M. 1974. Some digenetic trematodes from synaphobranchid eels. Journal of Parasitology, 60, 80–84. 10.2307/3278682 Search in Google Scholar

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

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

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

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

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

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

Shen J.W. 1990. Digenetic Trematodes of Marine Fishes from Hainan Island. Science Press, Beijing, China, pp. 228 Search in Google 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, 259–273 Search in Google 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. 10.2307/3272591 Search in Google Scholar

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

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

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

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

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

Received: 2016-11-10
Revised: 2017-1-26
Accepted: 2017-2-9
Published Online: 2017-4-18
Published in Print: 2017-6-1

© 2017 W. Stefański Institute of Parasitology, PAS