Contribuições ao conhecimento das Heterophyidae: (Trematoda)

Travassos, Lauro

doi:10.1590/s0074-02761931000100002

Cited by 17 publications

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“…Pygidiopsoides is placed in the subfamily CENTROCESTINAE be added to those belonging to the CENTROCESTINAE. One of these, Lacerdaia, was described by Travassos (1931), the type specimen, L. lacerdaia, having been obtained from a marine shore bird, Sula leucogastra, captured in the vicinity of Rio de Janeiro. The other, Caimanicola marajoara, was described by Freitas and Lent (1938) …”

Section: Discussionmentioning

confidence: 99%

Pygidiopsoides spindalis n. gen., n. sp., (Heterophyidae; Trematoda), and Its Second Intermediate Host

Martin¹

1951

The Journal of Parasitology

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JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org.. The American Society of Parasitologists is collaborating with JSTOR to digitize, preserve and extend access to The Journal of Parasitology.Naturally infected brackish-water fishes, Fundulus parvipinnis parvipinnis (Girard), were collected at Newport Bay, California and fed to cats and to newlyhatched chicks. After a lapse of four to six days the cats and chicks were found to harbor small trematodes in the small intestine which do not fit any of the existing genera although they obviously are heterophyids. MATERIALS AND METHODS Living specimens and material fixed inBouin's solution and stained with paracarmine were studied. OBSERVATIONS Pygidiopsoides n. gen. Diagnosis: Small, oval to spindle-shaped trematodes. Mouth surrounded by a single row of large spines. Oral sucker oval in lateral view not tapering posteriorly into a cone. Prepharynx, pharynx, and esophagus well-developed, ceca terminating near posterior border of ventral sucker. Ventral sucker near mid-body level, well-developed, and enclosed in a ventrogenital sac. Single testis in posterior one-third of body. Large seminal vesicle bipartite; "prostate" well-developed; cirrus and cirrus sac lacking. Ovary between testis and acetabulum; Laurer's canal present; uterus in mature specimens filling most of posterior half of body; eggs oval, operculate, relatively large; vitellaria transverse between testis and ovary. Large, muscular, common genital ejector present. Ventro-genital sac contains two, lateral, lenticular gonotyls. Excretory bladder simple, spindle-shaped to tubular; excretory pattern of the "mesostoma" type. Remnants of eyespots may be present. Genotype: Pygidiopsoides spindalis. Pygidiopsoides spindalis n. sp. (Figs. 1-3) Diagnosis: With characters of the genus. Body spindle-shaped to oval and measuring 0.223-0.429 mm. (av. 0.314 mm.) in length and 0.066-0.095 mm. (av. 0.081 mm.) in maximum width. Cuticula moderately thick and covered with spines which decrease in size at both ends of the body. Fourteen spines ranging from 0.010 mm. to 0.012 mm. in length and 0.003 mm. in width surround the mouth. Circular muscles lie immediately mediad to circum-oral spines. Remnants of eyespots occur between pharynx and acetabulum. Oral sucker oval in lateral view and averaging 0.028 mm. wide and 0.049 mm. long. Prepharynx approximately as long as pharynx. Pharynx muscular, varying from spherical to oval, and measuring 0.016 mm. in diameter when spherical. Esophagus two to three times the length of the pharynx. Cecal bifurcation anterior to acetabulum, ceca terminate at or near the posterior margin of acetabulum. Acetabulum in mid-body region, enclosed in ventro-genital sac, and measuring 0.028-0.033 mm. (av. 0.030 mm.) in leng...

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Section: Discussionmentioning

confidence: 99%

Pygidiopsoides spindalis n. gen., n. sp., (Heterophyidae; Trematoda), and Its Second Intermediate Host

Martin¹

1951

The Journal of Parasitology

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“…The same pattern of spines was seen in the specimens obtained from Ixobrychus involucris. (P.) angrense is a species known only from birds; its cercaria remains unknown, but its metacercaria is found in the gills of Phalloceros caudimaculatus, as determined by Travassos (1931) and Ostrowski de Nt~fiez (1974). On the basis of the differences in the number of crown spines and the body spination I resurrect A.…”

Section: Sogandaresmentioning

confidence: 99%

Life-history studies of heterophyid trematodes in the Neotropical Region: Ascocotyle (Phagicola) diminuta (Stunkard & Haviland, 1924) and A. (P.) angrense Travassos, 1916

Núñez

1993

Syst Parasitol

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The life-cycle of Ascocotyle (Phagicola) diminuta (Stunkard & Haviland, 1924) was reproduced experimentally, starting from cercariae from naturally infected Littoridina casteIlanosae and L. parchappei (Hydrobiidae) collected from artificial ponds in the Zoological Garden in Buenos Aires and from Los Ranchos stream, Buenos Aires Province, respectively. Metacercariae were found encysted in the gills of experimentally exposed Cnesterodon decemmaculatus (Poecilidae) and of other naturally infected freshwater fishes. Adults were obtained experimentally in chicks and mice and from a naturally infected egret, Egretta thula. A. (P.) angrense Travassos, 1916 was found parasitising the egret Ixobrychus involucris; it is considered a valid species and the morphological differences between it and A. (P.) diminuta were established. The "Phagicola-form" of the cercaria in the present life-cycle is also known in the genus Pygidiopsis.

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Schrankiana chacoensissp. nov. (Nematoda: Atractidae) fromLeptodactylus bufoniusBoulenger, 1894 (Anura: Leptodactylidae) from Argentina

González

Hamann

2013

Journal of Natural History

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Contribuições ao conhecimento das Heterophyidae: (Trematoda)

Cited by 17 publications

References 0 publications

Pygidiopsoides spindalis n. gen., n. sp., (Heterophyidae; Trematoda), and Its Second Intermediate Host

Pygidiopsoides spindalis n. gen., n. sp., (Heterophyidae; Trematoda), and Its Second Intermediate Host

Life-history studies of heterophyid trematodes in the Neotropical Region: Ascocotyle (Phagicola) diminuta (Stunkard & Haviland, 1924) and A. (P.) angrense Travassos, 1916

Schrankiana chacoensissp. nov. (Nematoda: Atractidae) fromLeptodactylus bufoniusBoulenger, 1894 (Anura: Leptodactylidae) from Argentina

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