@article {41, title = {Taxonomic notes on Polyacanthorhynchus kenyensis (Acanthocephala: Polyacanthorhynchidae) from Lake Naivasha, Kenya.}, journal = {J Parasitol}, volume = {81}, year = {1995}, month = {1995 Feb}, pages = {76-9}, abstract = {

The original description of Polyacanthorhynchus kenyensis Schmidt and Canaris, 1967 from 2 species of fish in Lake Naivasha, Kenya was primarily based on measurements of 2 male cystacanths. That description is herein emended based on the availability of a larger number of immature worms of both sexes obtained from the freshwater teleosts Orechromis leucostictus, Tilapia zillii (new paratenic host records), and Micropterus salmoides. A secretory function for the apical organ is suggested.

}, keywords = {Acanthocephala, Animals, Bass, Female, Fish Diseases, Fresh Water, Helminthiasis, Helminthiasis, Animal, Kenya, Male, Microscopy, Electron, Scanning, Perciformes, Tilapia}, issn = {0022-3395}, author = {Amin, O M and Dezfuli, B S} } @article {42, title = {Acanthocephala of marine fishes off Fiji Islands, with descriptions of Filisoma longcementglandatus n. sp., Neorhadinorhynchus macrospinosus n. sp. (Cavisomidae), and gravid females of Rhadinorhynchus johnstoni (Rhadinorhynchidae); and keys to species of }, journal = {J Parasitol}, volume = {80}, year = {1994}, month = {1994 Oct}, pages = {768-74}, abstract = {

A parasitological collection from marine fishes off the Fiji Islands yielded 5 species of acanthocephalans from 4 species of fish as follows: Filisoma longcementglandatus n. sp. from scat Scatophagus argus; Neorhadinorhynchus macrospinosus n. sp. from vermiculated rabbit fish Siganus vermicularis; Neorhadinorhynchus nudum (Harada, 1938) Yamaguti, 1939 (Cavisomidae) from mackerel tuna Euthynnus affinis; Rhadinorhynchus johnstoni Golvan, 1969 (Rhadinorhynchidae) from E. affinis; and Neoechinorhynchus agilis (Rudolphi, 1819) Van Cleave, 1916 (Neoechinorhynchidae) from striped mullet Mugil cephalus. All are new locality records and, except for N. agilis, new host records. Filisoma longcementglandatus is distinguished from all other species of the genus by its very long cement glands and size and armature of its proboscis. Neorhadinorhynchus macrospinosus has distinctly larger proboscis hooks than all other members of the genus. Keys to species of the genera Filisoma and Neorhadinorhynchus are included. Gravid females of the inadequately described R. johnstoni are described for the first time. Taxonomic notes on the other acanthocephalan species are also included.

}, keywords = {Acanthocephala, Animals, Female, Fiji, Fish Diseases, Fishes, Helminthiasis, Helminthiasis, Animal, Male, Seawater}, issn = {0022-3395}, author = {Amin, O M and Nahhas, F M} } @article {30, title = {Redescription of Rhadinorhynchus ornatus (Acanthocephala: Rhadinorhynchidae) from skipjack tuna, Katsuwonus pelamis, collected in the Pacific Ocean off South America, with special reference to new morphological features.}, journal = {J Parasitol}, volume = {95}, year = {2009}, month = {2009 Jun}, pages = {656-64}, abstract = {

Adults of Rhadinorhynchus ornatus Van Cleave, 1918 were collected from the small intestine of skipjack tuna, Katsuwonus pelamis (Linnaeus), in the high seas of the Pacific Ocean off the west coast of South America (new parasite locality record) and described using optical microscopy and a scanning electron microscope (SEM). Our specimens were somewhat comparable to those described from North America and Japan, but had more trunk spines. Definitive differences between the length and thickness of each of the dorsal and ventral proboscis hooks are noted for the first time, with most ventral middle hooks being relatively shorter and more robust than dorsal middle hooks. The SEM documented, for the first time, the different surface topography of the tegument in the proboscis, the neck, and in 3 trunk regions; the presence of microtrichs in the mid- and posterior trunk regions; the elevated base of trunk spines; the circular arrangement of basal proboscis hooks; the different morphology of all dorsal and ventral proboscis hooks and the striations of their surface; the ribbed surface topography of eggs; the elevated slit-like female gonopore; and the rimmed edge of the bursa. The presence of microtrichs on the tegumental surface is further supported by transmission electron microscopy studies. This is the first report of microtrichs in any species of Acanthocephala and the second report of striations in proboscis hooks. The geographical distribution of R. ornatus appears to correspond, at least in part, to that of its epipelagic primary host, K. pelamis, throughout the world in waters ranging in temperature from 14.7 to 30 C.

}, keywords = {Acanthocephala, Animals, Female, Fish Diseases, Helminthiasis, Animal, Male, Microscopy, Electron, Scanning, Microscopy, Electron, Transmission, Pacific Ocean, Prevalence, South America, Tuna}, issn = {1937-2345}, doi = {10.1645/GE-1804.1}, author = {Amin, Omar M and Heckmann, Richard A and Radwan, Nahla A E and Anchundia, Johan S Mantuano and Alcivar, Marcos A Zambrano} } @article {31, title = {Description of a new Echinorhynchid species (Acanthocephala) from the European eel, Anguilla anguilla, in Germany, with a key species of Acanthocephalus in Europe.}, journal = {J Parasitol}, volume = {94}, year = {2008}, month = {2008 Dec}, pages = {1299-1304}, abstract = {

Acanthocephalus rhinensis n. sp. is described from the European eel. Anguilla anguilla (Linnaeus, 1758), collected in the Rhine River near the city of Karlsruhe, Germany. It is the sixth species of Acanthocephalus Koelreuther, 1771 described from European fish. Four other species are known from amphibians. The new species is distinguished from the other 5 species infecting fish by having a 1.2-mm-long proboscis armed with 15-21 rows of 13-16 hooks each, lemnisci about as long as receptacle, oblong and slightly pre-equatorial testes, and thin fusiform eggs, measuring 85-95 X 15-18 micro. Testes in the other European species are usually round to ovate, except in Ac. anguillae (M{\"u}ller, 1780) L{\"u}he, 1911 where they are also elongated but postequatorial. It aslo has an orange-brown belt encircling the anterior end of the trunk. The comparative distribution of Acanthocephalus in Europe and North America, and the validity of 2 presumably questionable species are discussed, Acanthocephalus falcatus (Froelich, 1789) L{\"u}he, 1911 and Ac. Paronai (Cendorelli, 1897) Meyer, 1932. A dichotomus key distinguishing Ac. rhinensis from the other 9 European species is also included. The new species was only found in 3 of 390 eels examined during 11 yr; this may be related to the changing benthos community in the Rhine River.

}, keywords = {Acanthocephala, Anguilla, Animals, Female, Fish Diseases, Germany, Helminthiasis, Animal, Male, Rivers}, issn = {0022-3395}, doi = {10.1645/GE-1561.1}, author = {Amin, Omar M and Thielen, F and M{\"u}nderle, M and Taraschewski, H and Sures, B} } @article {14, title = {Acanthocephalus parksidei sp. n. (Acanthocephala: Echinorhynchidae) from Wisconsin fishes.}, journal = {J Parasitol}, volume = {61}, year = {1975}, month = {1975 Apr}, pages = {301-6}, abstract = {

Acanthocephalus parksidei sp. n. is described from over 4,000 specimens recovered from 11 fish hosts in the Pike River, southeastern Wisconsin. A parksidei is a highly variable acanthocephalan which appears to present an intermediate form between the only 2 other members of the same genus, A. dirus and A. jacksoni, described from North American freshwater fishes. It is structurally similar to the larger A. dirus but is separated from it primarily by having fewer proboscis hook rows and hooks per row. It is separated from A. jacksoni on the basis of its slender body form, relatively larger size of male reproductive system in proportion to body size, as well as other features. It differs from the larger European A. lucii by having smaller proboscis hooks, different hook root shape, smaller proboscis receptacle, and smaller embryos.

}, keywords = {Acanthocephala, Animals, Female, Fish Diseases, Fishes, Helminthiasis, Helminthiasis, Animal, Male, Wisconsin}, issn = {0022-3395}, author = {Amin, O M} } @article {16, title = {Host and seasonal associations of Acanthocephalus parksidei Amin, 1974 (Acanthocephala: Echinorhynchidae) in Wisconsin fishes.}, journal = {J Parasitol}, volume = {61}, year = {1975}, month = {1975 Apr}, pages = {318-29}, abstract = {

Ecological associations of Acanthocephalus parksidei Amin, 1974, were studied in 11 southeastern Wisconsin fishes during 1972-73. Parasitic load was found to be related to host species, size (age), sex, concurrent infections, collection site, and season. Distribution in host intestine was related to the extent or intensity of infection, posterior migration, and concurrent infections. Parasitic cycle commenced in later summer-early autumn, peaked (in frequency and maturation) during the spring, and terminated in the late summer.

}, keywords = {Acanthocephala, Animals, Cestode Infections, Cyprinidae, Female, Fish Diseases, Fishes, Helminthiasis, Helminthiasis, Animal, Intestines, Male, Seasons, Trout, Wisconsin}, issn = {0022-3395}, author = {Amin, O M} } @article {18, title = {Acanthocephala from lake fishes in Wisconsin: ecology and host relationships of Pomphorhynchus bulbocolli (Pomphorhynchidae).}, journal = {J Parasitol}, volume = {73}, year = {1987}, month = {1987 Apr}, pages = {278-89}, abstract = {

Pomphorhynchus bulbocolli Linkins in Van Cleave, 1919, was considerably more common in fishes of the river-connected Tichigan Lake than of the landlocked Silver Lake, southeastern Wisconsin. It is reported from 17 species of principal, accessory, and occasional definitive hosts (new record in Moxostoma carinatum) and from 13 species of paratenic hosts (new records in Amia calva, Ictalurus punctatus, Lepomis cyanellus, and Pomoxis nigromaculatus). Infection patterns were influenced by fish species, feeding behavior, temperature, availability of intermediate host, type of water body, fish movement, and changes in fish host community. Host roles are not fixed but are often interchangeable. A seasonal cycle in prevalence, intensity, and maturation was evident, with greatest abundance and maturation during summer and recruitment during summer and autumn. Recruitment of new infections, development, and release of eggs, however, occurred all year. Sex ratio changed from near equal in new infections to one more highly in favor of females in older adults. Female fish were considerably more frequently and heavily infected than males. No relationship with fish age (size) was evident. Worms were mostly attached in posterior intestinal locations but initial establishment sites correlated with temperature. Translocation of P. bulbocolli due to competitive exclusion in concurrent infections was not observed. The significance of extraintestinal larval forms in the cycle of transmission was noted.

}, keywords = {Acanthocephala, Animals, Female, Fish Diseases, Fishes, Helminthiasis, Helminthiasis, Animal, Host-Parasite Interactions, Intestinal Diseases, Parasitic, Male, Seasons, Wisconsin}, issn = {0022-3395}, author = {Amin, O M} } @article {20, title = {The description of Paralongicollum nemacheili n. gen., n. sp. (Acanthocephala: Pomphorhynchidae) from freshwater fishes in Kazakh S.S.R.}, journal = {J Parasitol}, volume = {77}, year = {1991}, month = {1991 Feb}, pages = {26-31}, abstract = {

Paralongicollum nemacheili n. gen., n. sp. is described from Salmo gairdneri Richardson and Nemacheilus stoliczkai Steindacher in Lake Kul\&$\#$39;say in the basin of Lake Balkhash, Kazakh S.S.R. Its long uniformly cylindrical neck and nonfiliform proboscis distinguish it from the other 3 genera of the family. Tenuiproboscis Yamaguti, 1935, has a filiform proboscis. The neck of Pomphorhynchus Monticelli, 1905, has a bulb anteriorly, and that of Longicollum Yamaguti, 1935, is spirally twisted with expansions. A key to the genera of Pomphorhynchidae is provided. The relatively longer necks in juveniles than in larger worms probably enhance the establishment of new infections. A large proportion of worms had extensive body wall deformities. Longicollum sergenti (Choquette and Gayot, 1952) Golvan, 1969, is relegated to the new genus Paralongicollum.

}, keywords = {Acanthocephala, Animals, Cypriniformes, Female, Fish Diseases, Fresh Water, Helminthiasis, Helminthiasis, Animal, Male, Terminology as Topic, Trout}, issn = {0022-3395}, author = {Amin, O M and Bauer, O N and Sidorov, E G} } @article {23, title = {Description and pathology of Neoechinorhynchus idahoensis n. sp. (Acanthocephala: Neoechinorhynchidae) in Catostomus columbianus from Idaho.}, journal = {J Parasitol}, volume = {78}, year = {1992}, month = {1992 Feb}, pages = {34-9}, abstract = {

Neoechinorhynchus idahoensis is described from Catostomus columbianus caught in the Salmon River, Stanley Basin, Idaho. The new species is closest to Neoechinorhynchus venustus Lynch, 1936, but is distinguished from it by its smaller and variably structured eggs, anterio-dorsal trunk hump, bent and posteriorly notched proboscis receptacle, and larger proboscis, proboscis receptacle, and hooks. It is distinguished also from 2 other species of Neoechinorhynchus with proboscis hooks in middle and anterior circles about equally large and from 7 other species having lemnisci greatly unequal in length. Histopathology of host tissue showed limited host response exemplified by epithelial damage and hemorrhaging at point of proboscis attachment with subsequent macrophage and other phagocytic cell migration. The proboscis extended through the host epithelium into the submucosa with limited hemorrhaging at the point of attachment. Unorganized collagenous fibers were present. The lumen of the host intestine was obstructed, and compressed villi were present. The trunk of the worm damaged intestinal epithelium near the crypts, causing localized inflammation. The caryophyllaeid cestode Isoglaridacris calentinei Mackiewicz, 1974, was present in concurrent infections of C. columbianus.

}, keywords = {Acanthocephala, Animals, Cypriniformes, Female, Fish Diseases, Idaho, Intestinal Diseases, Parasitic, Intestinal Mucosa, Intestines, Male}, issn = {0022-3395}, author = {Amin, O M and Heckmann, R A} }