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The brightly colored cystacanth stages of these parasites are visible through the gammarid cuticle, allowing preliminary selection of infected individuals directly in the field.

(unidentified adults) 10 1% 1/150 10 -- Rhabdias ranae 255 47% 70/150 3.6 (1-16) Physalopteridae (third stage larvae) 2 1% 1/150 2 -- Acanthocephala Centrorhynchid cystacanths 31 3% 4/150 7.8 (1-27) Oligacarrathorhynchid cystacanth 0 -- -- -- -- 2004-2007 collection Mean intensity n Prevalence (range) Cestoda Distoichometra bufonis 4 2% 2/100 2.0 (1-3) Digeneana Deropegus aspina 0 -- -- -- -- Glypthelmins quieta 35 10% 10/100 3.5 (1-7) Gorgoderina multilobata 4 3% 3/100 1.3 (1-2) Haematoloechus kernensis 228 32% 32/100 7.1 (1-35) Megalodiscus microphagus 2 1% 1/100 2 -- Echinostome metacercariae 35 1% 1/100 35 -- Nematoda Cosmocercoides variabilis 1 1% 1/100 1 -- Hedruri.s sp.

Persistence and stability of the component helminth community of the foothill yellow-legged frog, Rana boylii (Ranidae), from Humboldt County, California, 1964-1965, versus 2004-2007

Acanthocephalan cystacanths have been reported from Ctenosaura pectinata, Phyllodactylus lanei, Sceloporus jarrovii and S.

Gastrointestinal helminths of the black-tailed brush lizard, Urosaurus nigricaudus (phrynosomatidae), from Baja California Sur, Mexico

pulex are easily recognized, because the yellow-orange cystacanth stage of P.

Parasite-induced changes in behavior and color make Gammarus pulex more prone to fish predation

Acanthocephalans require at least two hosts in the life cycle; arthropods are the usual intermediate hosts in which the infective stage, the cystacanth, develops (Nickol 1985).

Coelomic helminths in the speckled racer, Drymobius margaritiferus (serpentes: colubridae) from Central America

Helminths collected consisted of one single male oligacanthorhynchid cystacanth occurring within the mesentery adjacent to the proximal small intestine in an adult non-gravid female C.

Natural occurrence of Macracanthorhynchus ingens (Acanthocephala: Oligacanthorhynchidae) in a northern black racer, Coluber constrictor constrictor (Serpentes: Colubridae)

ingens would first have to develop to an infective cystacanth stage in an intermediate insect host.

First report of the Acanthocephalan Macracanthorhynchus ingens from the domestic dog Canis familiaris in Kansas

Mole crabs (Emerita analoga), the intermediate host for P altmani and a major component of the gull-billed tern diet in San Diego, were found in the stomachs of necropsied terns along with cystacanths, and are the presumed source of the parasite infection.

Mass mortality attributed to acanthocephaliasis at a gull-billed tern (Gelochelidon nilotica) colony in coastal California, USA

Altered evasive behavior and responses to light in amphipodes harboring acanthocephalan cystacanths. J.

Hitch-hiker parasites or how to benefit from the strategy of another parasite

These last authors recorded seasonal occurrence of Quadrigyrus nickoli Schmidt and Hugghins, 1973 cystacanths in H.

First record of Hysterothylacium sp. Moravec, Kohn et Fernandes, 1993 larvae (Nematoda: Anisakidae) infecting the ornamental fish Hyphessobrycon eques Steindachner, 1882 (Characiformes, Characidae)/Primeiro registro de larvas de Hysterothylacium sp. Moravec, Kohn et Fernandes, 1993 (Nematoda: Anisakidae) infectando o peixe ornamental Hyphessobrycon eques Steindachner, 1882 (Characiformes, Characidae)

(larvae) and one species of Acanthocephala represented by cystacanths (Oligacanthorhynchidae), were found.

Helminths of Six Species of Colubrid Snakes from Southern California

National Parasite Collection, Beltsville, Maryland: Oochoristica macallisteri, 87280; Physaloptera retusa, 87282; Spauligodon giganticus, 87281; oligacanthorhynchid acanthocephalan cystacanths, 87283.

Composition of the helminth community of a montane population of the side-blotched lizard, Uta stansburiana (Phrynosomatidae) from Los Angeles County, California

cystacanth

cys·ta·canth