Volume 68 January 2001 Number 1 Formerly the Journal of the Helminthological Society of Washington PEREZ-PONCE DE LE6N, G. The Diversity of Digeneans (Platyhelminthes: Cercomeria: Trematoda) in Vertebrates of Mexico . , 1 PEREZ-PONCE DE LE6N, G., F. A. JIMENEZ-RUIZ., B. MENDOZA-GARFIAS, AND L. GARCIA- PRIETO. Helminth Parasites of Garter Snakes and Mud Turtles from Several Localities of the Mesa Central of Mexico 9 BURSEY, C. R., S. R. GOLDBERG, AND J. R. PARMELEE. Gastrointestinal Helminths of 51 Species of Anurans from Reserva Cuzco Amazonico, Peru 21 HOGUE, C. C., AND J. S. PENG. ^Endohelminths of White Croaker (Genyonemus lineatus) from Los Angeles Harbor, Southern California, U.S.A. _ 36 AGUIRRE-MACEDO, M. L., T. SCHOLZ, D. GoNZALEz-SoLfs, V. M. VIDAL-MARTINEZ, P. POSEL, G. ARJONA-TORRES, E. Siu~EsTRADA, AND S. DuMAiLO. Larval Hehninths Parasitizing Freshwater Fishes from the Atlantic Coast of Nicaragua 42 CAIRA, J. N., AND A. N. SURGE. Three New Species of Acanthobothrium (Cestoda: Tetraphyllidea) from the Ocellated Electric Ray, Diplobatis ommata, in the Gulf of California, Mexico 52 KRJTSKY, D. C., W. A. BOEGER, AND R. B. ROBALDO. Neotropical Monogenoidea. 38. Revision of Rhabdosynochus Mizelle and Blatz, 1941 (Polyonchoinea: Dactylo- gyridea: Diplectanidae), with Descriptions of Two New Species from Brazil 66 ViDAL-MARTiNEZ, V. M., T. SCHOLZ, AND M. L. AGUIRRE-MACEDO. Dactylogyridae of Cichlid Fishes from Nicaragua, Central America, with Descriptions of Gussevia herotilapiae sp. n. and Three New Species of Sciadicleithrum (Monogenea: Ancyrocephalinae) , _ 76 AGARWAL, N., V S. YADAV, AND D. C. KRITSKY. On Ancyrocephalas etropli Gussev, 1963, from Etroplus suratensis (Perciformes: Cichlidae) in India, with Proposal of Scle- rodeidoides gen. n. (Monogenoidea: Dactylogyridae: Ancyrocephalinae) 87 NEIFAR, L. L. EUZET, AND O. K. BEN HASSINE. Hetemchocotyle gymnurae sp. n. (Mono- genea: Hexabothriidae), a Gill Parasite of Gymnura altavela (Elasmobranchii: Gymnuridae) from the Mediterranean Sea „ 91 KHARCHENKO, V A., J. R. LICHTENEELS, AND R. C. KRECEK. Cyathostomum mont- gomeryi andlts Place in the Cyathostominae (Nematoda: Strongylidae) . 97 AMIN, O. M. Neoechinorhynchus didelphissp. n. (Acanthocephala: Neoechinorhynchi- dae) from Redfin Pickerel, Esox americanns, in Georgia, U.S.A. 103 AMIN, O. M., R. S. S. AL-SADY, F. T. MHAISEN, AND S. F. BASSAT. Neoechinorhynchus iraqensis sp. n. (Acanthocephala: Neoechinorhynchidae) from the Freshwater Mullet Liza abu (Heckel), in Iraq 108 {Continued on Outside Back Cover) Copyright © 2011, The Helminthological Society of Washington THE HELMINTHOLOGICAL SOCIETY OF WASHINGTON THE SOCIETYmeets approximately five times per year for the presentation and discussion of papers in any and all branches of parasitology or related sciences. All interested persons are invited to attend. 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FONT HIDEO HASEGAWA DIANE P. BARTON DONALD FORRESTER SHERMAN S. HENDRIX LYNN K. CARTA J. RALPH LICHTENFELS JAMES E.JOY RALPH P. ECKERLIN JOHN S. MACKIEWICZ DAVID MARCOGLIESE FAUD M. NAHHAS BRENT NICKOL DANTE S. ZARLENGA DANNY B. PENCE © The Helminthological Society of Washington 2001 ISSN 1525-2647 This paper meets the requirements of ANSI/NISO Z39.48-1992 (Permanence of Paper). Copyright © 2011, The Helminthological Society of Washington Comp. Parasitol. 68(1), 2001 pp. 1-8 The Diversity of Digeneans (Platyhelminthes: Cercomeria: Trematoda) in Vertebrates in Mexico GERARDO PEREZ-PONCE DE LEON Laboratorio de Helmintologia, Institute de Biologia, Universidad Nacional Autonoma de Mexico, A.P. 70-153, C.P. 04510, Mexico, D.F., Mexico (e-mail: [email protected]) ABSTRACT: The Digenea is one of the most common groups of helminths found in vertebrates. In Mexico, the inventory of the group began in the 1930s. After 70 yr of taxonomic research, 503 species in 312 genera have been reported in approximately 440 of the 4,697 species of vertebrates known to occur in the country. Of these 503 digenean species, 153 are endemic or at least have been recorded only within Mexican territory. Most of these species have been described as parasites of fishes, both freshwater and marine. The overall size of the fauna was estimated in 2 ways, based on available information. Between 5,300 and 8,000 species of digeneans in Mexican vertebrates is estimated, representing 8-10% of the world's digenean fauna; >77,000 digenean species are estimated worldwide. Digeneans, because of their prevalence and abundance in nature and their complex life cycles, are one of the most important groups of parasites to be considered in managing biodiversity, in conservation, and as indicators for ecosystem monitoring. KEY WORDS: biodiversity, Platyhelminthes, Digenea, vertebrates, Mexico. In Mexico, digeneans of wild vertebrates have many cases researchers have neglected to de- been studied since the 1930s, following the pi- posit specimens and their published accounts in oneer work by Sokoloff and Caballero (1932) the national depository of helminths in Mexico, describing Chiorchis fabaceus (Diesing, 1838) the National Collection of Helminths. Therefore, Fischoeder, 1901, as a parasite of the manatee we initiated a process to track all available pub- Trichechus manatus latirostris Halt, 1934. Since lished information, as well as data from different then, the group has been studied more or less parasite collections, including the U.S. National intensively by Mexican and foreign researchers, Parasite Collection, the H. W. Manter Labora- such as Caballero, Winter, Bravo-Hollis, Manter, tory of Parasitology, and the British Museum of Arai, and Lamothe-Argumedo (see Lamothe-Ar- Natural History. gumedo et al. [1997] and references therein). The task of describing new species of dige- Over 25 authors have published nearly 300 ar- neans, as with many other groups of metazoan ticles describing, redescribing, or recording dif- parasites, is important because the description of ferent species of digeneans parasitizing verte- that portion of biodiversity is far from complete brates collected within Mexico. Recently, Cribb and parasites in general represent an important (1998) analyzed the diversity of the Digenea of component of the biosphere. Brooks and Hoberg Australian animals, estimating the size of the (2000) and Brooks et al. (2000) argued that par- fauna and describing the trends in the taxonomy asites qualify under each of the criteria estab- of digeneans of different groups of vertebrates lished by the Global Taxonomic Initiative in that country. Here, I present an analysis of (American Museum of Natural History, 1999) to the digenean fauna of Mexican vertebrates to be selected as part of any