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Published: 2020-04-20

A new genus and two new species of unarmed hymenolepidid cestodes (Cestoda: Hymenolepididae) from geomyid rodents in Mexico and Costa Rica

Harold W. Manter Laboratory of Parasitology, University of Nebraska State Museum, University of Nebraska-Lincoln, Nebraska 68588-0514, U.S.A. 87131;
Harold W. Manter Laboratory of Parasitology, University of Nebraska State Museum, University of Nebraska-Lincoln, Nebraska 68588-0514, U.S.A. 87131
Museum of Southwestern Biology, Department of Biology, University of New Mexico, Albuquerque, New Mexico
Harold W. Manter Laboratory of Parasitology, University of Nebraska State Museum, University of Nebraska-Lincoln, Nebraska 68588-0514, U.S.A. 87131
Cestoda bilobed ovary DAMA Protocol discriminant analysis Hobergia n. gen. Hobergia irazuensis n. gen. n. sp. Hymenolepididae Hymenolepis cratogeomyos new genus new species morphology


Two new cestodes of the family Hymenolepididae are described from two species of rodents of the family Geomyidae collected in Mexico and Costa Rica. One new species of Hymenolepis is described from Cratogeomys planiceps Merriam 1895 from near Toluca, Mexico and another that we allocate to a new genus is described from Heterogeomys heterodus (Peters, 1865) from near Irazú Volcano, Costa Rica. Hymenolepis s. str. includes those Hymenolepididae with an apical organ, with no hooks on suckers or apical organ, and three testes. Hobergia irazuensis n. gen., n. sp. includes a hymenolepidid with an apical organ, unarmed scolex, small pockets termed foveolae, in which the suckers completely retract, and extremely bi-lobed ovary. Multivariate morphometric analysis showed good separation of these species from all other hymenolepidids possessing an apical organ and lacking a well developed rostellum and rostellar hooks in the Nearctic and Neotropical regions.



  1. Alberico, M. (1990) A new species of pocket gopher (Rodentia: Geomyidae) from South America and its biogeographic significance. In: Peters, G. & Hutterer, R. (Eds.), Vertebrates in the Tropics: Proceedings of the International Symposium on Vertebrate Biogeography and Systematics in the tropics, Bonn, 5–8 June 1989. Alexander Koenig Zoological Research Institute and Zoological Museum, Bonn, pp. 103–111.

    Bartel, M.H. & Gardner, S.L. (2000) Arthropod and helminth parasites from the plains pocket gopher, Geomys bursarius bursarius from the hosts’ northern boundary range in Minnesota. Journal of Parasitology, 86, 153–156.[0153:AAHPFT]2.0.CO;2

    Bonino-Vassallo, N.A. & Hilje-Quirós, L. (1992) Comparación de dos métodos de combate de la taltuza Orthogeomys heterodus Rodentia, Geomyidae en Costa Rica. Manejo Integrado de Plagas, 23, 39–45.

    Brooks, D.R. & McLennan, D.A. (1993) Parascript: Parasites and the language of evolution. University of Chicago Press, Chicsgo, 429 pp.

    Brooks, D.R., Hoberg, E.P., Boeger, W.A., Gardner, S.L., Galbreath, K.E., Herczeg, D., Mejia-Madrid, H.H., Rácz, S.E. & Dursahinhan, A.T. (2014) Finding them before they find us: informatics, parasites, and environments in accelerating climate change. Comparative Parasitology, 81, 155–164.

    Burnham, G.L. (1953) A study of the helminth parasites of the pocket gophers of Woods, Alfalfa, Grant, and Marshall Counties, Oklahoma. Proceedings of the Oklahoma Academy of Science, 34, 59–61.

    Burt, M.D.B. (1980) Aspects of the life history and systematics of Hymenolepis diminuta. In: Arai, H.P. (Ed.), Biology of the Tapeworm Hymenolepis diminuta. Academic Press, New York, New York, pp. 1–57.

    Chervy, L. (2009) Unified terminology for cestode microtriches: a proposal from the International Workshops on Cestode Systematics in 2002–2008. Folia Parasitologica, 56, 199–230.

    Douthitt, H. (1915) Studies on the Cestode Family: Anoplocephalidae. Illinois Biological Monograph, University of Illinois, Champaign, Illinois, 96 pp.

    English, P.F. (1932) Some habits of the pocket gopher, Geomys breviceps breviceps. Journal of Mammalogy, 13, 126–132.

    Frandsen, J.C. & Grundmann, A.W. (1961) Endoparasitism in isolated populations of rodents of the Lake Bonneville Basin, Utah. Journal of Parasitology, 47, 391–396.

    Frey, J.K., Duszynski, D.W., Gannon, W.L., Yates, T.L. & Gardner, S.L. (1992) Designation and curatorial management of type host specimens (symbiotypes) for new parasite species. Journal of Parasitology, 78, 930–932.

    Gardner, S.L. (1985) Helminth parasites of Thomomys bulbivorus (Richardson) (Rodentia: Geomyidae), with the description of a new species of Hymenolepis (Cestoda). Canadian Journal of Zoology, 63, 1463–1469.

    Gardner, S.L. & Schmidt, G.D. (1988) Cestodes of the genus Hymenolepis Weinland, 1858 sensu stricto from pocket gophers Geomys and Thomomys spp. (Rodentia: Geomyidae) in Colorado and Oregon, with a discriminant analysis of four species of Hymenolepis. Canadian Journal of Zoology, 66, 896–903.

    Gardner, S.L. & Campbell, M.L. (1992) Parasites as probes for biodiversity. Journal of Parasitology, 78, 596–600.

    Gardner, S.L., Luedders, B. & Duszynski, D. (2014) Hymenolepis robertrauschi n. sp. from Grasshopper mice Onychomys spp. in New Mexico and Nebraska, U.S.A. Occasional Papers Museum of Texas Tech University, 332, 1–10.

    Genov, T. (1984) Helminths of insectivores and rodents in Bulgaria. Publishing House of the Bulgarian Academy of Sciences. Sofia, Bulgaria, pp. 1–348.

    Hafner, M.S., Spradling, T.A., Light, J.E., Hafner, D.J. & Demboski, J.R. (2004) Systematic revision of pocket gophers of the Cratogeomys gymnurus species group. Journal of Mammalogy, 85, 1170–1183.

    Hall, E.R. (1981) The mammals of North America. 2nd Edition. Wiley and Sons, New York, pp. 1–1181.

    Haukisalmi, V., Hardman, L.M., Foronda, P., Feliu, C., Laakkonen, J., Niemimaa, J., Lehtonen, J.T. & Henttonen, H. (2010) Systematic relationships of hymenolepidid cestodes of rodents and shrews inferred from sequences of 28S ribosomal RNA. Zoologica Scripta, 39, 631–641.

    Hennig, W. (1966) Phylogenetic Systematics. University of Illinois Press, Urbana, Illinois, 256 pp.

    Hughes, R.C. (1940) The genus Hymenolepis Weinland 1858. Technical Bulletin Oklahoma Agricultural Experiment Station, 8, 1–42.

    Hoberg, E.P. (1997) Phylogeny and Historical Reconstruction: Host-Parasite Systems as Keystones in Biogeography and Ecology. In: Reaka-Kudla, M.L.,Wilson, D.E. & Wilson, E.O. (Eds.), Biodiversity II: Understanding and Protecting Our Biological Resources. Joseph Henry Press, Washington, D.C., pp. 243–262. [551 pp.]

    Kurtén, B. & Anderson, E. (1980) Pleistocene Mammals of North America. Columbia University Press, New York, pp. 1–442.

    Maggenti, A.R. & Maggenti, M.A. (2005) Dictionary of Invertebrate Zoology. University of Nebraska-Lincoln, Digital Commons, 976 pp. [Gardner, S.L. (Ed.)]

    Makarikov, A.A., Gardner, S.L. & Hoberg, E.P. (2012) New species of Arostrilepis (Eucestoda: Hymenolepididae) in Members of Cricetidae and Geomyidae (Rodentia) from the western Nearctic. Journal of Parasitology, 98, 617–626.

    Makarikov, A.A., Nims, T.N., Galbreath, K.E. & Hoberg, E.P. (2015) Hymenolepis folkertsi n. sp. (Eucestoda: Hymenolepididae) in the oldfield mouse Peromyscus polionotus (Wagner) (Rodentia: Cricetidae: Neotominae) from the southeastern Nearctic with comments on tapeworm faunal diversity among deer mice. Parasitology Research, 114, 2107–2117.

    Makarikov, A.A., Tkach, V.V., Villa, S.M. & Bush, S.E. (2015) Description of two new species of Hymenolepis Weinland, 1858 (Cestoda: Hymenolepididae) from rodents on Luzon Island, Philippines. Systematic Parasitology, 90, 27–37.

    McLeod, J.A. (1933) A parasitological survey of the genus Citellus in Manitoba. Canadian Journal of Research, 9, 108–127.

    Rácz, S.E. & Gardner, S.L. (2020) A morphological phylogeny of Hymenolepis sensu stricto and other tapeworms of the Neotropical and Nearctic regions. The Journal of Parasite Biodiversity. [in review at Manter]

    Rankin, J.S. (1945) Ecology of the helminth parasites of small mammals collected from Northrup Canyon, Upper Grand Coulee, Washington. The Murrelet, 26 (1), 11–14.

    Russell, R.J. (1968) Evolution and classification of the pocket gophers of the subfamily Geomyinae. University of Kansas Publications, Museum of Natural History, 16, 475–579.

    SAS Institute Inc. (2013) Base SAS® software version 9.4 Procedures Guide. SAS Institute Inc. Cary, North Carolina Available from: .pdf (accessed 12 May 2017)

    Schmidt, G.D. (1986) CRC Handbook of tapeworm identification. CRC Press, Inc., Boca Raton, Florida, pp. 1–675.

    Schultz, R.L. (1939) Hymenolepis scalopi n. sp. American Midland Naturalist, 22 (3), 641–645.

    Simpson, G.G. (1928) Pleistocene mammals from a cave in Citrus County, Florida. American Museum Novitates, 328, 1–16.

    Solari, S., Muñoz-Saba, Y., Rodríguez-Mahecha, J.V., Defler, T.R., Ramírez-Chaves, H.E. & Trujillo, F. (2013) Riqueza, endemismo y conservación de los mamíferos de Colombia. Mastozoología Neotropical, 20, 301–365.

    Spasskii. A.A. (1954) Classification of hymenolepidids of mammals. Trudy Gel’mintologcheskoy Laboratorii, 7, 120–134.

    Spradling, T.A., Demastes, J.W., Hafner, D.J., Milbach, P.L., Cervantes, F.A. & Hafner, M.S. (2016) Systematic revision of the pocket gopher genus Orthogeomys. Journal of Mammalogy, 97, 405–423.

    Ubelaker, J.E. & Downhower, J.F. (1965) Parasites recovered from Geomys bursarius in Douglas County, Kansas. Transactions of the Kansas Academy of Science (1903–), 68, 206–208.

    Ubelaker, J.E. (1980) Structure and ultrastructure of the larvae and metacestodes of Hymenolepis diminuta. In: Arai, H.P. (Ed.), Biology of the tapeworm Hymenolepis diminuta. Academic Press, New York, pp. 59–156. [733 pp.]

    Voge, M. (1955) A list of cestode parasites from California mammals. American Midland Naturalist, 54, 413–417.

    Wardle, R.A. & McLeod, J.A. (1952) The zoology of tapeworms. University of Minnesota Press, Minneapolis, Minnesota, 780 pp.

    Wilkins, K.T. (1985) Pocket gophers of the genus Thomomys Rodentia: Geomyidae from the Pleistocene of Florida USA. Proceedings of the Biological Society of Washington, 98, 761–767.

    Wilson, D.E. & Reeder, D.M. (2005) Mammal species of the world: a taxonomic and geographic reference. Johns Hopkins University Press, Baltimore, Maryland, 2142 pp.

    Yamaguti, S. (1959) Systema helminthum. Vol. II. The cestodes of vertebrates. Interscience Publishers, Inc., New York and London, 860 pp.

    Yarinsky, A. (1952) Hymenolepis pitymi n. sp., a hymenolepidid cestode from the pine mouse. Journal of the Tennessee Academy of Science, 27, 150–152.