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| Registros recuperados: 14 | |
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| Seixas,Samantha A.; Amato,José F. R.; Amato,Suzana B.. |
| Temnocephala rochensis Ponce de Léon, 1979, was the second of four species of Temnocephala Blanchard, 1849 to be described as ectosymbiont of ampullariid apple snails, Pomacea canaliculata (Lamarck, 1822). There have been no records of this Uruguayan species after its initial description. As part of the present study, 111 specimens of P. canaliculata were collected between 2003 and 2009. Temnocephalans found in the pallial cavity were identified as T. rochensis, occurring in single infestations, or concurrently with Temnocephala haswelli Ponce de Léon, 1989. Specimens of T. rochensis showed a conspicuous red eye pigment which faded after ethanol fixation. Important taxonomic characters of the reproductive system were evidenced by several techniques, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ectocommensals; Mollusks; Neotropical Region; South America; Taxonomy. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000500019 |
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| Seixas,Samantha A.; Amato,José F. R.; Amato,Suzana B.. |
| The original description of Temnocephala iheringi Haswell, 1893 was based on specimens collected by Hermann von Ihering from undetermined ampullariid apple snails, which at that time were identified as Ampullaria sp., and sent to William H. Haswell, with the type locality simply indicated as Brazil. The type specimens studied by Haswell were not found in the scientific collections of Brazil, Europe or Australia, and should be considered lost. In 1941, Pereira & Cuocolo collected specimens from apple snails, identified as Pomacea lineata (Spix in Wagner, 1827), at two localities (Guaicurús and Salobra) in the state of Mato Grosso do Sul, central Brazil. These specimens could not be located either and should, thus, be considered lost as well. Pomacea... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ectocommensals; Mollusks; Neotropical Region; South America; Taxonomy. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000200012 |
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| Seixas,Samantha A.; Amato,José F. R.; Amato,Suzana B.. |
| The impact of the discovery of Temnocephala haswelli Ponce de Léon, 1989, described as ectosymbionts of ampullariid apple snails outside of Uruguay, motivated us to collect a large number of specimens of Pomacea canaliculata (Lamarck, 1822) from several localities in the southern portion of the state of Rio Grande do Sul. This species was recorded three times after its description: in a study of chromosomes, in a study about the ultrastructure of the collar receptor cells, and in a study of the Haswell glands, all conducted in Uruguay. A total of 301 specimens of P. canaliculata were collected from 1999 to 2007. Temnocephalans found in the pallial cavity were identified as T. haswelli, which occurred in single infestations or concurrently with Temnocephala... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ectocommensals; Mollusks; Neotropical Region; South America; Taxonomy. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000300020 |
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| Monteiro,Cassandra M.; Amato,José F. R.; Amato,Suzana B.. |
| Os nematóides do gênero Syncuaria Gilbert, 1927 são parasitos de aves das ordens Pelecaniformes, Ciconiiformes e Podicipediformes. Onze espécies são consideradas válidas neste gênero, no entanto, somente duas, Syncuaria buckleyi (Ali, 1957) Wong, Anderson & Bartlett, 1986 e Syncuaria squamata (Linstow, 1883) Wong, Anderson & Bartlett, 1986 parasitam aves do gênero Phalacrocorax Brisson, 1760. Entre 1999 e 2003 foram coletados 47 biguás, Phalacrocorax brasilianus (Gmelin, 1789) no Lago Guaíba, Município de Guaíba, Rio Grande do Sul, Brasil. Oito destas aves estavam infectadas por S. squamata. A prevalência e a intensidade média de infecção na amostra foram de 8,5% (8 de 47) e 2,5 helmintos/hospedeiro, respectivamente. Esta comunicação amplia... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Helmintos; Taxonomia. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752006000400041 |
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| Amato,José F. R.; Amato,Suzana B.; Seixas,Samantha A.. |
| Temnocephala lutzi Monticelli, 1913, ectosymbiont on brachyuran freshwater crabs of the genus Trichodactylus Latreille, 1828 is recorded for the first time in the State of Rio Grande do Sul, southern Brazil. Two hundred and seventy-nine crabs of two species were examined: 211 Trichodactylus panoplus (von Martens, 1869) and 68 Trichodactylus fluviatilis Latreille, 1828 of which 51 (24.17%) and 28 (41.17%) were positive for T. lutzi, respectively. Crabs of both species carried eggs fixed, exclusively, on the floor of the branchial chambers and/or on the lower side of the gills. Adult as well as young specimens were found inside and outside the branchial chambers. The temnocephalans were always devoid of body pigmentation, although they kept the red eye... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brachyura; Ectocommensals; Neotropical region; Rio Grande do Sul; South America; Taxonomy. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752005000400038 |
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| Amato,José F. R.; Amato,Suzana B.. |
| A new species of Temnocephala Blanchard, 1849 is described from southern Brazil, ectosymbiont on giant water bugs (aquatic hemipterans), Belostoma spp. from the greater Porto Alegre, State of Rio Grande do Sul. Some hemipterans examined were positive for this species of Temnocephala and carried bunches of eggs between the first two pairs of legs and between the first pair of legs and the rostrum, as well as adult and young specimens. The adults were darkly pigmented (greenish-brown), mimetizing the color of the hemipteran hosts. The new species is similar to Temnocephala decarloi Moretto, 1978, from Argentina, the only other species of Temnocephala from belostomatid hemipterans known to date, by having an extra long and curved cirrus, but differs by having... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ectocommensals; Neotropical; Rio Grande do Sul; South America; Taxonomy. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752005000100014 |
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| Monteiro,Cassandra M.; Amato,José F. R.; Amato,Suzana B.. |
| Três espécies de aves, dois anatídeos, Dendrocygna bicolor (Vieillot, 1816) (marreca-caneleira) e Netta peposaca (Vieillot, 1816) (marrecão) e um phalacrocoracídeo, Phalacrocorax brasilianus (Gmelin, 1789) (biguá) foram coletados em vários locais na Província da Planície Costeira e no Lago Guaíba, Estado do Rio Grande do Sul. O número de aves examinadas de cada espécie de hospedeiro, assim como os valores de prevalência e intensidade média de infecção foram: 33 D. bicolor, 3%, 1 helminto/hospedeiro; 20 N. peposaca 15%, 4,3 helmintos/hospedeiro e 47 P. brasilianus 2,1%, 1 helminto/hospedeiro. O espécime coletado no biguá e um dos espécimes, entre aqueles, coletados nos marrecões estavam na cloaca. Os outros espécimes coletados nos marrecões e o único... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anatídeos; Biguá; Parasitos; Rio Grande do Sul; América do Sul; Taxonomia. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752007000100035 |
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| Amato,José F. R.; Amato,Suzana B.; Seixas,Samantha A.. |
| Temnocephala trapeziformis sp. nov., ectosymbiont on Trichodactylus fluviatilis Latreille, 1828 is described from the State of Rio Grande do Sul, southern Brazil. Sixty-eight crabs were examined, of which 61 (89.7 %) were positive for this species of the genus Temnocephala Blanchard, 1849. Eggs, as well as adult and young specimens, were found on the pleural areas of the carapace, in the orbital cavities, and, usually, on the fourth pair of pereiopods. The temnocephalans were always devoid of body pigmentation, although they kept the red eye pigment, undiluted in specimens fixed by hot (90ºC) phosphate buffered 10% formalin. The most distinctive characters of the new species are: 1) the shape and size of the cirrus and the characteristics of its introvert... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ectocommensals; Neotropical region; Rio Grande do Sul; South America; Taxonomy. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752006000300026 |
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| Amato,José F. R.; Seixas,Samantha A.; Amato,Suzana B.. |
| Temnocephala minutocirrus sp. nov., an ectosymbiont on Cryphocricos granulosus De Carlo, 1967, is described from the State of Rio Grande do Sul, southern Brazil. One hundred and nine naucorids were examined, of which 36 (33%) were positive for this species of Temnocephala Blanchard, 1849. In one sample of 94 creeping water bugs, 49 (52%) were 4th instar nymphs, 6% of which were infested; 45 (48%) were adults, either brachypterous (40 with 18 males and 22 females) or macropterous (5 with 1 male and 4 females), 67% of which were infested (29% males and 38% females). Temnocephalan eggs were found both ventrally and dorsally: fixed on coxae, trochanters, and along the sternum between fore middle, and hind pairs of legs; basal of the abdominal area; and on the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ectocommensals; Neotropical Region; Rio Grande do Sul; South America; Taxonomy. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752007000400022 |
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| Amato,Suzana B.; Amato,José F. R.. |
| Giant water bugs (aquatic Heteroptera), Belostoma dilatatum (Dufour, 1863), were collected in rice plantation water canals, in the Municipality of Eldorado do Sul, outskirts of Porto Alegre, State of Rio Grande do Sul, southern Brazil. Five specimens were dissected with the objective of finding metacercariae of digenetic trematodes. Four of them (80%) were positive for metacercarial cysts of Stomylotrema vicarium Braun, 1901. The intensities of infection varied from 1 to 16 metacercariae per host (average 7.6). The cysts were whitish, translucent, and found loose among the viscera, in the abdominal and thoracic cavities. Belostoma dilatatum is a new host record for metacercarial cysts of stomylotrematid digenetic trematodes and this is the first time that... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Heteroptera; Trematode; Neotropical; Rio Grande do Sul; South America. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752006000100028 |
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| Amato,José F. R.; Amato,Suzana B.; Araujo,Paula B.; Quadros,Aline F.. |
| The observation of pigmentation alteration in isopod crustaceans induced by acanthocephalans, known as pigmentation dystrophy, has been documented in North America in species of the aquatic genera Asellus Geoffroy, 1764, Lirceus Rafinesque-Schmaltz, 1820, and Caecidotea Packard, 1871, and in Europe, in Asellus. Recently, three depigmented specimens of Atlantoscia floridana (van Name, 1940), a terrestrial isopod, occurring from >Florida, USA to northern Argentina were found showing pigmentation dystrophy and harboring larval acanthocephalans. Photographic documentation of live and preserved, infected isopods is presented. Morphometric data and photomicrographs of the male, unencysted cystacanth specimen which allowed its placement in the genus... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crustacea; Cystacanth; Intermediate hosts; Pigmentation alteration; Southern Brazil. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752003000400026 |
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| Amato,José F. R.; Monteiro,Cassandra M.; Amato,Suzana B.. |
| The present report is part of a larger study on the helminth fauna of Neotropical Cormorants, Phalacrocorax brasilianus (Gmelin, 1789) in Brazil, particularly, in the southernmost State of Rio Grande do Sul. The nematodes which were found loose in the proventriculus/ventriculus or in groups of adults of different ages and of L3 and L4 larval stages, forming eosinophylic granulomas had a prevalence of 100% in 47 Neotropical cormorants from Lago Guaíba, Municipality of Guaíba. The morphology of the labia/interlabia, the distribution pattern of the caudal papillae in males examined under scanning electron microscopy (SEM), and the tips of the spicules allowed determination of the species as Contracaecum rudolphii Hartwich, 1964 sensu lato (s. l.). This is the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eosinophylic granulomas; Lago Guaíba; Rio Grande do Sul; SEM; Taxonomy. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752006000400046 |
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| Silveira,Eliane F. da; Amato,José F. R.; Amato,Suzana B.. |
| This is the first report of a species of Echinuria Soloviev, 1912, on anatid hosts in South America, causing granulomas. It is also the first detailed description and record of a species of Echinuria, for South America in the Rosy-billed Pochard, Netta peposaca (Vieillot, 1816). Fifty-two rosy-billed pochards were examined for helminths in the Municipalities of Santa Vitória do Palmar (locality of Fazenda Sossego) and (locality of Ponta da Antena), State of Rio Grande do Sul, Brazil, and Alvear, Province of Corrientes, northern Argentina. Samples were obtained from 2003 to 2004. After the catch each bird was immediately frozen with dry ice. Prior to necropsy birds were sexed, weighted, measured, and the state of maturity (juvenile or adult) determined,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Breeding grounds; Granuloma; Migratory flyway; Northern Argentina; Rosy-billed pochard; Southern Brazil; Wintering grounds. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752006000200027 |
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| Registros recuperados: 14 | |
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