| description and host relationships of polymorphus spindlatus n. sp. (acanthocephala: polymorphidae) from the heron nycticorax nycticorax in peru. | polymorphus spindlatus n. sp. is described from the black-crowned night heron, nycticorax nycticorax, in lake titicaca, peru. it is distinguished from all 27 known species of the subgenus polymorphus by its spindle-shaped proboscis and its trunk shape, the anterior 2/3 of which is ovoid, tapering into a tubular posterior end. it resembles polymorphus brevis (=arhythmorhynchus brevis), which is, however, longer and considerably more slender, and has smaller and more numerous proboscis hooks per r ... | 1991 | 2010853 |
| helminth parasites of girardinichthys multiradiatus (pisces: goodeidae) in the upper lerma river sub-basin, mexico. | thirteen helminth species were recorded during a helminthological examination of 754 girardinichthys multiradiatus (meek) (pisces: goodeidae) collected from 20 localities in the upper lerma river sub-basin on the highland plateau of mexico. the study constitutes a complete and extensive inventory of the helminth parasites of this freshwater fish species across its entire current geographic distribution. the collected species included one adult trematode, three metacercariae, one monogenean, one ... | 2004 | 15221467 |
| helminth parasites of chapalichthys encaustus (pisces: goodeidae), an endemic freshwater fish from lake chapala, jalisco, mexico. | a total of 6 helminth species were recorded during helminthological examination of 50 chapalichthys encaustus from lake chapala, jalisco, mexico. helminth species identified included: salsuginus sp. (an undescribed monogenea); posthodiplostomum minimum (metacercariae); cyclustera ralli (metacestode); polymorphus brevis (cystacanth); contracaecum sp. (nematode larvae); and rhabdochona lichtenfelsi (adult nematode). of these, 2 (salsuginus sp. and r. lichtenfelsi) are specialist species. the obser ... | 2004 | 15357094 |
| parasitic helminths of free-ranging mink (neovison vison mink) from southern florida. | five free-ranging mink, neovison vison mink, from in or near the fakahatchee strand preserve state park, collier county, florida (26 degrees 00'n, 81 degrees 25'w), were examined for parasitic helminths. nine species of helminths were identified (2 trematodes, 5 nematodes, and 2 acanthocephalans). the most prevalent parasites were molineus patens (4 of 5 mink), mean intensity 173 (range, 12-342); strongyloides sp. (4 of 5), mean intensity 48 (range, 1-170); macracanthorhynchus ingens (immature) ... | 2007 | 17918381 |
| erection of ibirhynchus gen. nov. (acanthocephala: polymorphidae), based on molecular and morphological data. | the genus southwellina is composed of 3 described species, i.e., s. hispida (the type species), s. dimorpha, and s. macracanthus. all 3 are endoparasites of fish-eating birds that have worldwide distributions. morphologically, the genus is characterized by possessing a short and compact trunk, 2 fields of spines in the anterior region of the trunk (in at least 1 sex), a short cylindrical proboscis (sometimes with a swollen region armed with numerous longitudinal rows of hooks), a double-walled p ... | 2010 | 21348614 |
| using dna barcoding to link cystacanths and adults of the acanthocephalan polymorphus brevis in central mexico. | in parasitic organisms, particularly helminths, the usage of the mitochondrial cytochrome c oxidase subunit i gene as the standard dna barcoding region for species identification and discovery has been very limited. here, we present an integrated study, based on both dna barcoding and morphological analyses, for acanthocephalans belonging to the genus polymorphus, whose larvae (cystacanths) are commonly found in the mesentery of freshwater fishes, while adults are found in the intestine of fish- ... | 2013 | 23480472 |