A new genus and species of cyclocoelid from the black-necked stilt, Himantopus mexicanus (Recurvirostridae), from Galveston, Texas
ABSTRACT Two black-necked stilts, Himantopus mexicanus (Recurvirostridae), from the Texas Gulf coast, died while in the care of bird rehabilitators and were found to be infected with Neoallopyge americanensis n. gen., n. sp. Neoallopyge n. gen. (Digenea: Cyclocoelidae) differs from Allopyge in having the testes situated some distance from the posterior extremity, 2 uterine loops on each side extensively invading the space posterior to the testes, no intertesticular uterine loops, and it is a parasite of Recurvirostridae in the western hemisphere rather than Gruidae from the Old World. The new species is unlike Allopyge antigones, Allopyge ominosus, and Allopyge undulatus in having the genital pore located anterior to the cecal bifurcation rather than posterior to it, and it is unlike A. ominosus and A. undulatus, where the uterus is entirely intercecal in having the uterine loops extending laterally, reaching the body wall on both sides. The new species further differs from A. antigones, A. ominosus, and Allopyge skrjabini in having larger eggs (148 [140-155] microm by 55 [45-63] microm compared with 95 by 55 microm, 65-80 by 40-46 microm, 119-124 by 55-66 microm, respectively), and it differs from Allopyge adolphi and A. undulatus in having narrower eggs (154 by 75 microm, 144 by 86 microm, respectively).
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ABSTRACT: Two American goldeneye ducks, Bucephala clangula americana (Anatidae), collected from the Galveston, Texas, U.S.A., area were infected with 5 (2 in 1 duck and 3 in the second) Ophthalmophagus bucephali n. sp. (Cyclocoelidae). Two additional specimens of this species, also collected from the American goldeneye from Hastings, Minnesota, U.S.A., were found in the holdings of the H. W. Manter Laboratory of Parasitology, University of Nebraska, Lincoln, U.S.A. The new species can be distinguished from all other species in the genus by having the ovary contiguous with the posterior testis and by having the prepharynx longer than the esophagus (approximately twice as long). Ophthalmophagus bucephali n. sp. can be distinguished from all other species except for Ophthalmophagus massinoi by having uterine loops that do not invade the postovarian space and from all species except Ophthalmophagus singularis by having the ovary contiguous with the posterior confluence of the ceca (cyclocoel). A checklist of parasites previously reported from B. clangula is also provided.Comparative Parasitology 01/2009; DOI:10.1654/4221.1 · 0.74 Impact Factor
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ABSTRACT: The 11 species currently assigned to Morishitium and the new species described herein are divided into the rauschi, straightum and vagum body types, and keys to species are provided. Morishitium urocissae n. sp. is described from the red-billed blue magpie, Urocissa erythrorhyncha (Corvidae), from the Dashahe Nature Reserve, Guizhou Province, southwestern Peoples Republic of China. Morishitium urocissae n. sp. is similar to M. bivesiculatum by having a similar ratio of the width of the pharynx to the width of the oral sucker (1:1.0–1:1.2 compared to 1:1.0) and a similar sized cirrus sac (470–565 long; 3–5% of body length compared to 400; 4%). Both species also have the anterior extent of the vitelline fields reaching the level of the pharynx, which distinguishes them from all other species in the genus that have an oral sucker present and lack a ventral. The new species differs from M. bivesiculatum by having a larger maximum egg size (135 by 70 compared to 127 by 65), uterine loops that overreach the ceca laterally rather than being intercecal, a shorter distance from the posterior testis to the posterior arch of the cyclocoel (70 [0–110] compared to 400), and by being from a magpie from the People’s Republic of China rather than being from a barbet from Sri Lanka. The new species is most similar to M. dumetellae, but differs from this species by having wider eggs (65 compared to 60), a longer body (10,400–13,350 compared to 8,500), a shorter cirrus sac (470–565; 3–5% of the body length compared to 595; 7%), a smaller ratio of the pharynx to the oral sucker (1:1.0–1:1.3 compared to 1:1.7), more laterally extensive uterine loops (overreaching the ceca compared to being interececal), the anterior extent of the vitelline fields reaching to the level of the pharynx as compared to terminating posterior to the cecal bifurcation, and by being from a magpie from the People’s Republic of China rather than from a catbird from the United States.Zootaxa 07/2014; 3835:273-282. DOI:10.11646/zootaxa.3835.2.7 · 1.06 Impact Factor
Zootaxa 01/2006; 1131:49-58. · 1.06 Impact Factor