Studies on Monogenetic Trematodes. XL. New Species from Marine and Freshwater Fishes

Abstract

This paper presents descriptions of new species as follows: Anacanthorus brevis from Brycon melanopterus (Cope) ; Dactylogyrus navarroensis from Hesperoleucas navarroensis Snyder; Diplectanum jaculator and D. toxotes from Toxotes jaculator (Pallas) ; Parahaliotrema affinis from Chaetodon auriga Forskal and C. lunula (Lacepede); P. brevis from Acanthostracion quadricornis (Linnaeus); P. cornutus from Bodianus pulchellus Poey; P. grandis from Chaetodon auriga, C. lunula and C. setifer Bloch; P. pacificus from Chaetodon nigrorostris (Gill); and P. zebrasoma from Zebrasom.a veliferum (Bloch). All hosts were frozen initially for a minimum of 48 hours except Brycon melanopterus (Cope), which was placed directly into 10% formalin. Further preparation concerning mounting, observation, measurement, illustration, and descriptions including nomenclature were employed as given by Mizelle and Kritsky (1967), Kritsky and Mizelle (1968) and Mizelle, Kritsky and Crane (1968). All measurements are in microns. Acknowledgments.-The authors are indebted for aid in the collection of host specimens to the following (all California): M. R. Brittan, Sacramento State College, for Brycon melanopterus (Cope); J. Wittmer Crane, University of California, Davis, for Hesperoleucas navarroensis Snyder; R. P. Dempster, Steinhart Aquarium, California Academy of Sciences, San Francisco, for Bodianus pulchellus Poey, Chaetodon auriga Forskal, C. lunula (Lacepede), C. nigrorostris (Gill), C. setifer Bloch, Acanthostracion quadricornis (Linnaeus), Toxotes jaculator (Pallas) and Zebrasoma zelifer (Bloch). Especial thanks are due S. H. Weitzman, U.S. National Museum, Washington, D.C., for aid in the identification of fishes. This investigation was supported by the National Science Foundation (GB 6455). Anacanthorus brevis sp. n. (Figs. 21-23) Host and locality.-Brycon melanopterus (Cope) (Characidae), Rio Xeruiny near Terra Preta, Amazonas, Brazil, S. A. Location on host.-Gills. Type specimens.-Holotype, USNM Helm. Coll. No. 70967. Paratypes in authors' collections. Description (based on three specimens).-Dactylogyridae, Ancyrocephalinae. Length 386 (382-389), width 122 (93-152). Cephalic lobes poorly developed; head organs and cephalic glands inconspicuous. Eyespots four, anterior pair smaller, distance between members of pairs variable; accessory eyespot granules in trunk, peduncular and cephalic areas. Pharynx broadly ovate, width 30 (23-37); gut normal. I Present address: Department of Zoology, University of Illinois, Urbana