Showing papers in "Journal of the Helminthological Society of Washington in 1992"

The genus Bitylenchus Filip'ev, 1934 (Nematoda: Tylenchida) with descriptions of two new species from Spain

Abstract: ABSTRAcr: The taxonomic position of the genus Bitylenchus Filip'ev, 1934, is discussed and its diagnosis emended. Two new species, B. serranus sp. n. and B. pratensis sp. n., from southeastern Spain are described and illustrated using light and scanning electron microscopy (SEM). Bitylenchus serranus sp. n. is characterized by a hemispherical lip region with 6-8 annuli, stylet 21 ~m long, lateral field with regularly areolated outer bands, a short postanal intestinal sac extending up to one-fourth of the tail length, and a broadly conoid tail usually ventrally curved (about 90% of specimens studied). Bitylenchus pratensis sp. n. is characterized by a subcylindrical female tail regularly tapering to a rounded and striated terminus and a basal esophageal bulb as long as or longer than the isthmus. Several populations of B. maximus (Allen, 1955) Siddiqi, 1986, from Scotland, Spain, Trinidad, and U.S.A. are described and compared. The Spanish population is characterized by the presence of males and inseminated females; SEM observations are provid~. A population of B. huesingi (paetzold, 1958)

Eimeria rheemi sp. n. (Apicomplexa : Eimeriidae) from the Arabian sand gazelle, Gazella subgutturosa marica (Artio dactyla : Bovidae) in Saudi Arabia

Abstract: Oocyst s of Eimeria rheemi sp. n. were detected in the feces of 35 out of 73 (48%) rheem or Arabian sand gazelles, Gazella subgutturosa marica Thomas, 1897, examined at King Khalid Wildlif e Researc h Center , Thumamah, Riyadh Province, Saudi Arabia. Sporulated oocyst s of E. rheemi sp. n. are spherical or ovoid, 25 x 21 (20-34 x 18-30) ^m, with smooth, double-layere d wall and micropyle, but no micropylar cap. The outer oocyst layer is yellow, almost twice as thick as the bluish-green inner one. Sporocyst s oval, 1 0 x8 (6-15 x 510) /j.m, each with a Stieda body and residuum. Sporozoites elongat e 9 (7-11) urn, each with a single refractile globule 3 (2-4) nm in diameter at the wider end. Sporulation time 24 hr at 25 ± 2°C in aqueous K2Cr2O7. Eimeria rheemi sp. n. is pathogeni c to young rheem (2-4 mo old) causing mild to sever e mucoid diarrhea, commensurat e with the fecal oocyst count and has responde d well to sulphonamide treatment .

Gonapodasmius williamsoni sp. n. (Digenea: Didymozoidae) from the Pink Snapper, Pagrus auratus (Teleostei: Sparidae) in Western Australia

Abstract: Gonapodasmius williamsoni sp. n. (Digenea: Didymozoidae: Gonapodasmiinae) is described from the muscle of the pink snapper, Pagrus auratus (Teleostei: Sparidae) from Shark Bay, Western Australia. The species is separable from the 15 described Gonapodasmius species most notably by the presence of a well-developed glandular "stomach" (Drusenmagen), and by its site and host-specificity.

Gastrointestinal helminths of the soutwestern earless lizard, Cophosaurus texanus scitulus, and the speckled earless lizard, Holbrookia maculata approximans (Phrynosomatidae)

Abstract: Fifty-three Cophosaums texanus scitulus from Pima County, Arizona, and 15 Holbrookia maculata approximans from Cochise County, Arizona, were examined for helminths. One nematode species , Thubunaea iguanae (prevalence 8%), 1 cestode species , Oochoristica sp. (prevalence 2%), and a juvenile acanthocephalan , Acanthocephalus sp. (prevalence 2%) were recovered from C. texanus scitulus (helminth prevalence 11%). All are new host records. Two nematode species , Atractis penneri (prevalence 13%) and Physaloptera sp. (prevalence 7%), were recovered from H. maculata approximans (helminth prevalence 13%).