Polymorphus

Polymorphus

a genus of thorny-headed worms in the phylum Acanthocephala.

Polymorphus boschadis
found in the posterior part of the small intestine of many domesticated and wild birds including ducks and fowls. Causes anemia, wasting and enteritis, and heavy infestations cause death losses in colonies of aquatic birds.
Polymorphus botulus
causes death losses in eider duck colonies.
Polymorphus magnus
found in the intestines of wild anseriform birds.
References in periodicals archive ?
For these parasites, dreissenids may serve as the first intermediate host (Bucephalus polymorphus, Phyllodistomum spp.
Comparison of rDNA sequences from colchicine treated and untreated sporocysts of Phyllodistomum folium and Bucephalus polymorphus (Digenea).
The plant, whose Latin name is Polymorphus mutablis, which roughly translates as many changing and mutating, is being nurtured by Julia Barton, who lives in the North Tyne Valley.
Glycyrrhiza lepidota Pursh 15 Lathyrus polymorphus Nutt var.
441a, 734, 855 - Candida fermentati 383, 390, 398 - Candida membranifaciens 474 - Candida saitoana 369, 476 - Cyteromyces matritensis 567 ++ Debaryomyces hansenii 640, 641, 642 - Debaryomyces polymorphus 384, 385, 650 - Dekkera bruxellensis 955b - Pichia anomala 507, 508, 702 - Pichia burtonii 553, 605 - Pichia guilliermondii 381, 397, 493 - Pichia jadinii 933 - Pichia holstii 441b, 957b - Pichia sydowiorum 732, 759 - Saccharomyces cerevisiae 856 - Saccharomyces kluyveri 567, 768 - Stephanoascus smithiae 707, 733, 737 - Zygoascus hellenicus 366, 368 - - Absence of clear zone around the colony: non-caseinolytic strain.
Synonyms: Prosorhynchus margaritae (Ozaki et Ishibashi, 1934) Ozaki, 1960; Bucephalus polymorphus von Baer, 1827; Bucephalus various Manter, 1940; Bucephalus retractilis Yamaguti, 1952; Bucephalus pseudovaricus Velasquez, 1959; Bucephalus carangoides Yamaguti, 1970; Bucephalus ulua Yamaguti, 1970.
Bucephalus polymorphus Baer, 1827 and Rhipidocotyle illense (Ziegler, 1883) (Trematoda, Bucephalidae): morphology and biology of developmental stages.
All three models are then fitted to a set of data reported by Crofton (1971) of a population of the acanthocephalan Polymorphus minutus, for which the amphipod Gammarus pulex acts as intermediate host.
The ducks were infected with the acanthocephalan Polymorphus minutus, for which Gammarus pulex acts as an intermediate host.
The effects of trematode Bucephalus polymorphus on the reproductive cycle of the zebra mussel Dreissena polymorpha in the Drava River.
Etude epizootiologique de la bucephalose larvaire a Bucephalus polymorphus, (Baer 1827) dans le peuplement piscicole du Bassin de la Seine.
And only one trematode, Bucephalus polymorphus, is known to cause parasitic damage to zebra mussels (Molloy et al.