945 resultados para Reactive species of oxygen
Resumo:
O gênero neotropical Thecomyia (Sciomyzidae) consiste de quatro espécies descritas e onze ainda não descritas (Steyskal & Knutson em preparação), sendo a maioria não muito comum. As espécies são muito próximas e grande número delas somente pode ser separado com base na genitália do macho. Somente é conhecida a biologia e uma espécie, T. limbata (Wiedermann), que, preferentemente, preda moluscos aquáticos (Abercrombie & Berg, 1975). A análise de registros de coletas de espécies relativamente raras e relativamente comuns de Thecomyia (172 especimens do Museu Goeldi coletados em Mocambo, Belém, Pará, Brasil) proporcionam informações sobre a distribuição sazonal de espécies tropicais e sua relativa abundância. Deste material 160 especimens pertencem à T. longicornis Perty e 12 à Thecomyia sp. n. A primeira foi registrada durante todos os meses do ano, mas a espécie nova somente durante junho e dezembro, sugerindo esta última uma população de adultos anual bimodal.
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Two new species of the calliphorid blow flies are described from Papua New Guinea under the names of Euphumosia lopesi and E. robertsi. Body coloration and mesonotal pattern are characteristic and differ from those of the closely allied species, E. evittata Togerson & James, 1967.
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Boettcheria solo sp. n. from the Dominican Republic is described and it is argued that its most probable sister group is B. parkeri Aldrich, 1916 from Jamaica. Boettcheria Parker, 1914 is briefly diagnosed and a list of included species is provided.
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A new species of the genus Johnstonimyia Lopes, namely J. lopesi, is described and illustrated.
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Amphisbaena hugoi, sp. n., from the site of the Balbina hydroelectric dam, in the state of Amazonas (01º53'S, 59º28'W), is sufficiently characterized by having (one specimen known): 4 preanal pores; 225 body annuli; 36 tail annuli, with autotomy constriction on the 13th annulus, 16 dorsal and 18 ventral segments to a midbody annulus; body color patter a brown back and a white belly, clearly demarcated, anteriorly at the level of the lateral sulcus, posteriorly one and then two scales below it, with a thin light line on the lateral sulcus, a white cap on the head, dorsally extending onto the neck; autotomy annulus ventrally brown-colored.
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Three new species of Muscida - Caricea acerca, Phaonia yinggeensis and Helina capaciflava - from China are described.
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Two new Neotropical species of the tribe Sphaeromiini are described and illustrated, Mallochohelea limitrofe from Argentina and Uruguay, and Neobezzia wirthi from Argentina. The first species is only known from the female sex, being the second one described from both, female and male specimens.
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A new species of whipworm, Trichuris robusti, is described from the cecum and large intestine of rodent, Ctnomys robusti, collected in northern Chile. The nematode shows close affinityto T. bradleyi and T. chilensis, both having been described from Chile but because of the possession of ceertain specific morphological chareacters, particularly the disposition of the proximal cloacal tube, could not be assigned to either of them. A key is presented to some of the Trichuris species reported from hystricomorph rodents in Chile and the biographical significance of speciation of chilean trichurids is discussed.
Resumo:
In cases of highly inflammatory dermatophytosis in humans, it is important to identify the possible source of animal transmission in order to prevent recurrence, family outbreaks or rapidly progressing epidemics. A survey of dermatophytes in pets during a 14-month period in Switzerland revealed, in addition to Microsporum canis, two different species of the Trichophyton mentagrophytes complex, Arthroderma benhamiae and Arthroderma vanbreuseghemii, all causing inflammatory dermatophytoses. Arthroderma benhamiae was only and frequently isolated from guinea pigs. Arthroderma vanbreuseghemii was isolated mainly from European short hair cats, but also from dogs and in one case from a pure-bred cat. Ninety-three percent of the cats carrying A. vanbreuseghemii were hunters and all had skin lesions. In contrast, cats with skin lesions that were strictly indoors were found to be almost exclusively infected by M. canis. Therefore, it can be suspected that infection with A. vanbreuseghemii occurred during hunting and that the natural source of this dermatophyte is either soil or an animal other than the cat, most probably a rodent.
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Based on scanning electron microscope (SEM) estudies, the male genitalia of three species of Ravinia and two species of Chaetoravinia (Diptera: Sarcophagidae, subtribe Raviniina) are described and compared.
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Sinopiella rotunda n. sp. from Brasília, DF, Brazil, is described.
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In the present paper, the Peruvian Procamallanus (Spirocamallanus) incarocai (Freitas & Ibañez 1970) is proposed as a junior synonym of P. (S.) hilarii Vaz & Pereira, 1934. The validity of the subgenera Procamallanus Baylis, 1923 and Spirocammallanus Olsen, 1952 is discussed. a check list and a key to the species of Procamallanus Baylis, 1923 occuring in Brazil are presented.
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The mature ooxysts of six new species of Caryospora are described from the faeces of Brazilian snakes. They are differentiated from other species previously recorded from reptiles, largely on the size and shape of the oocyst and sporocyst, structure of the oocyst wall, and presence or absence of a polar body. C. paraensis n. sp., and C. carajasensis n. sp., are from the "false coral", Oxyrhopus petola digitalis; C. pseustesi n. sp., from the "egg-eater", Pseustes sulphureus sulphureus; C. epicratesi n. sp., from the "red boa", Epicrates cenchria cenchria; and C. micruri n. sp., and C. constancieae n. sp., from the "coral snake", Micrurus spixii spixii. A re-description is given of C. jararacae Carini, 1939, from the "jararaca" Bothrops atrox, embodying some additional morphological features.
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Limnoderetrema tolosai sp. n. (Trematoda, Digenea) within an autochthonous freshwater fish, the silverside Basilichthys autralis Eigenmann, 1927, from Lakes Riñihue and Ranco in Southern Chile is described. The species is distinguished from Limnoderetrema minutum (Manter, 1954) by the presence of one spine in the cirrus and cecal bifurcation nearer to ventral sucker than to pharinx. It is proposed Limnoderetrema macrophallus (Szidat & Nani, 1951) n. comb. (originally Steganoderma). Limnoderetrema tolosai differs from L. macrophallus since it cirrus has a distal spine and by its vitelline follicles distribution. It seems that Limnoderetrema spp. of South America are highly specific unlike L. minutum of New Zealand.