Sample records for spicules
from WorldWideScience.org

Sample records 1 - 11 shown.



1

Uso de opalas biogênicas na identificação de sedimentos lacustres e marinhos/ Biogenic opals in the identification of lacustrine and marine sediments

Lani, João Luiz; Schwandes, Larry; Rezende, Sérvulo Batista de; Lani, José Antonio; Amaral, Eufran Ferreira do; Cunha, Alexson de Mello; Costa, Liovando Marciano da
2007-08-01

Resumo em português Procurou-se utilizar opalas biogênicas, também conhecidas como espículas ou "pó-de-mico", como identificadoras de sedimentos lacustres ou marinhos. Para isso, analisaram-se camadas e horizontes de um Gleissolo Tiomórfico Húmico na região do rio Riacho, Aracruz, ES. Cada amostra de solo foi submetida a tratamentos específicos para o isolamento das espículas; posteriormente, elas foram identificadas em microscópico eletrônico de varredura. Verificou-se a presenç (mais) a de espículas de origem tanto lacustre como marinha e que estas, além de serem úteis na identificação da origem dos sedimentos, podem propiciar, pela sua forma, as condições geoquímicas do ambiente e a distância de transporte dos sedimentos. Resumo em inglês This study aimed to identify lacustrine or marine sediments based on biogenic opals (also known as spicules). The layers and horizons of a Humic Gley Thiomorphic soil in the Riacho catchment area, Aracruz, state of Espirito Santo, Brazil, were analyzed. Each soil sample was specifically treated to isolate the spicules, which were then identified by an electronic microscope. It was possible to verify the presence of lacustrine as well as marine spicules. Moreover, the shap (mais) e of the opals provided information on the conditions of the geochemical environment and transport distance of the sediments.

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2

Levantamento de cauxi (Porifera, Demospongiae), provável agente etiológico de doença ocular em humanos, Araguatins, rio Araguaia, Estado do Tocantins, Brasil/ Survey for cauxi (Porifera, Demospongiae), urged by the outbreak of human ocular injuries at Araguatins, Araguaia river, Tocantins State, Brazil

Volkmer-Ribeiro, Cecilia; Batista, Twiggy C. A.
2007-03-01

Resumo em português Um surto recente de lesões oculares em humanos, ocorrido na localidade de Araguatins, à margem direita do rio Araguaia, Estado do Tocantins, caracterizou-se por irritação ocular seguida de prurido e produção de lesões conjuntivais, em crianças e adultos, particularmente do sexo masculino, após banho e mergulho com olhos abertos nas águas do rio, durante a estação seca de 2005. Registros publicados de dermatites pruriginosas causados pela presença de espícula (mais) s de esponjas (cauxi) em rios da Amazônia Central, induziram as autoras a realizarem levantamento urgente para busca de esponjas e suas espículas na água e sedimentos do rio no local, em diversas estações de amostragem georreferenciadas. Dez espécies de esponjas foram detectadas após o achado de gêmulas e espículas retidas nos sedimentos e em suspensão nas águas. É fornecida a lista das espécies e ilustrações das respectivas espículas para fins de sua detecção particularmente nos tecidos oculares alterados, cirurgicamente extraídos, fornecendo-se assim subsídios para comprovação da etiologia do surto e para procedimentos preventivos a serem tomadas pelas autoridades em saúde junto à população local. Resumo em inglês The recent outbreak of human ocular injuries, most in the conjunctive, occurred in the town of Araguatins, at the right bank of Araguaia river, State of Tocantins, Brazil, along the low water period of 2005, affected particularly male children and adults and had as main characteristic eye irritation and itching after bathing and diving with open eyes in the river waters, followed by appearance of ocular injuries. The large number of registers of itching and ulceration cau (mais) sed by sponge (cauxi) spicules in rivers of Central Amazonia urged the authors to undertake a survey for sponges and its spicules in the river waters and sediments in several GPS referred stations at the site. Ten sponge species were detected upon the finding of gemmules as well as upon spicules accumulated in the river sediments or suspended in the river waters. The ten species are listed and have their spicules illustrated aiming their detection in surgically extracted ocular damaged tissues, the determination of the disease etiology and the procedures to be taken by local health authorities to prevent further progress of the disease.

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3

Caracterização mineralógica dos Lutitos Diatomáceos da Península de Santa Elena, Equador/ Mineralogical characterization of the Diatoms Lutites of the Santa Elena Peninsula, Ecuador

Sánchez, Miguel Genaro Peralta; Gomes, Newton Souza; Carneiro, Mauricio Antônio; Gonçalves, Marcos Andrade; Delicio, Maria Paula
2010-06-01

Resumo em português Esse trabalho apresenta as principais características mineralógicas, físicas e geoquímicas dos lutitos diatomáceos do Membro Villingota da Formação Tosagua, localizada na bacia Progreso no sudoeste do litoral do Equador, visando à sua utilização como matéria-prima na elaboração de compostos cerâmicos mediante ativação alcalina. Os pelitos estudados do Membro Villingota apresentam uma complexa mistura que se caracteriza pela composição química, na qual p (mais) redominam sílica, carbonato e alumina, e por sua variada fauna de microfósseis, composta de diatomáceas, radiolários, espículas e foraminíferos. A ativação alcalina dessa mistura natural possibilitou a fabricação de geopolímeros, considerados materiais inorgânicos que podem substituir as argamassas e produtos minerais. Resumo em inglês This work describes the main mineralogical, physical and geochemical characteristics of the diatom lutites of the Villingota Member of the Tosagua Formation, located in the Progreso Basin in the Southwest of the Equatorian coast, with the view of using them as raw materials in the ceramic industry by means of alkaline activation. The studied pelites of the Villingota Member are composed of a complex mixture characterized by their chemical composition with predominance of (mais) silica, carbonate, and alumina, as well as by their varied microfossil fauna that includes diatoms, radiolarians, spicules and foraminifers. The alkaline activation of this natural mixture turned possible the manufacture of geopolymers, which are inorganic materials that can substitute binders and mineral products.

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4

Sôbre o Phlebotomus Brasiliensis Costa Lima, 1932 (Diptera, Psychodidae)

Mangabeira, O.; Sherlock, I. A.
1962-09-01

Resumo em inglês In 1939, Mangabeira obtained, under laboratory conditions, the development of eggs of Phlebotomus brasiliensis Costa Lima, 1932, collected at Lassance (typical locality), Minas Gerais, Brasil. He then studied the female and immature stages of this Phlebotomus. The results of these observations plus some more recent data on the male, geographical distribution and bionomics are presented. Morphologically it is closest to Phlebotomus runoides. However, the male Phlebotomus b (mais) rasiliensis differs from all other Phlebotomus because of its very long spicules, similar to those of Brumptomyia. The female differs by its longer ducts, and by possessing only four horizontal teeth in the buccal cavity, whereas P. runoides has approximately 12 teeth. The pupae of P. brasiliensis is characterized by its two pre-alar setae, which are very simple and small and by the abdominal setae, which are not planted on a protruding tubercle. The fourth stage larvae main characteristics are very thin antennae, inserted on a protruding tuberculum, and slightly brush-like hind frontal setae. P. brasiliensis is here reported, for the first time, for the State of Bahia (Cachoeira, Pojuca and Salvador). The species has almost always been found in armadillo burrows. In the State of Bahia it is more frequent during the dry season. Under laboratory conditions, the female lays about 53 eggs.

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5

Sôbre alguns Phlebotomus e Brumptomyia da Colômbia (Diptera, Psychodidae)

Sherlock, Italo A.
1962-09-01

Resumo em inglês The first case of Kala-azar in Colombia was discovered in Soledad, S. Vicente do Chucuri, Dept. Santander, by Gast-Galvis who viscerotomized a three year old girl deceased in December, 1943. In 1944, fifty-three Phlebotominae were collected in the chicken pen of the girl's house, two new species included. Mangabeira helped by A. Gast Galvis, Juan Antonio Montoya and E. Osorno Mesa, collected some Phlebotomus in that country. The geographical distribution of the species o (mais) f Phlebotomus collected in Colombia (P. abonnenci, P. camposi, P. columbianus, P. dubitans, P. gasti, P. montoyai, P. saulensis, P. serranus, P. triramulus) and two species of Brumptomyia (B. beaupertuyi and b mesari), are included. our description of the male P. columbianus is based on some specimens found in association with females. However, doubts exist about such association of sexes. There is no correspondence between the length of the spicules and the ducts of spermathecae. Besides, the specimens were not obtained by raising. The following new species are described and compared with previously known ones: a) Phlebotomus gasti sp. n. differs from the other species by a protruding tubercle in the gubernaculum. It has also fewer setae in the tuft of the basistyle, a different length of the inferior gonapophyses, and a differently shaped clasper. b) Phlebotomus dubitans sp. n. differs from P. walkeri and P. deanei (according to personal information from O. Theodor, who examined the types, they are identical to P. williamsi and P. sericeus respectively), mainly because these species have the inferior gonapophyses larger than the basistyle and fewer setae in the basistyle. P. evandroi is separated by the shape of the claspers and by the tuft of setae of the basistyle. P. marajoensis is the closest relative to P. dubitans. There is a possibility of their being synonymous. On the other hand, they can be differentiated by the existence of three extra distal spines in P. marajoensis. There is also a difference in their palpal indexes: for marajoensis I - II - IV - III - V, and for dubitans I - IV (III - II) - V. We notice, too, that the inferior gonapophyses in P. marajoensis is a little shorter. P. marajoensis has a long seta in the basistyle (clearly shown in the original drawing), not found in the new species. c) Phlebotomus montoyai sp. n.: The closest relatives are P. noguchii, P. peruensis, P. pescei, P. quinquifer and P. rickardi. They differ from the new species by the number and length of the setae of the basistyle tuft which are more numerous and longer in the new species. The shapes of their claspers are also different. Other differences are: the basal portion of the basistyle in P. noguchii is very wide (in montoyai it is narrower); the intermediate spine of the dististyle is located on a protruding tubercle ( in the new species there is hardly a tubercle); the spicules are long, and the inferior gonapophyses is longer than the basistyle. P. quinquifer and P. rickardi have a shorter dististyle and narrower wings, with different venation. The main difference, however lies, in the M4, which ends almost at the level of the junction of M1 with M2 (in P. montoyai the M4 ends far behind). In P. peruensis and P. pescei the intermediary spine of the dististyle is closer to the distal spine than to the basal one, whereas in the new species it is situated between the two pairs. Their inferior gonapophyses is longer than the basistyle. d) Brumptomyia mesai sp. n. - Closest relatives are: B. hamatus, B. pentacanthus, B. beaupertuyi which are easily separated from the new species because the tufts of their basistyle have thin and differently shaped hairs. Also their claspers are shaped differently. B. avellari is also easily recognized on account of the twisted aspect of its clasper and because the basal tuft of the basistyle has few setae, B. brumpti tuft of setae arise directly from the basistyle; these setae are stronger than those of the new species. It has 8 blade-like setae located on the inner surface of the distal half, whereas the new species has only six setae. In B. brumpti, there are three median and two terminal spines in the dististyle; in the new species, there are two median and two terminal spines and one between them, which is closer to the two median spines. The comparison with B. galindoi is based in a specimen determined by Fairchild and deposited in the entomological collection of the "Faculdade de Higiene e Saúde Pública da Universidade de S. Paulo". The genitalia of the new species is much shorter, in galindoi the inferior gonapophyses is 0,8 mm long whereas in B. mesai it hardly reaches 0,6 mm. The shape of the clasper and the distribution of its setae are different. The sub-median lamellae, besides being longer in B. galindoi are also longer in comparison with the other parts of the genitalia. The gubernaculum of the new species is longer, thinner, and more pointed; in B. galindoi it is shorter and triangular. In the drawing published by Fairchild and Hertig 91947), the basistyle shows 8 blade-like setae on the distal half, whereas in the new species only six are found.

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6

Redescrição de Litomosoides brasiliensis Almeida, 1936 (Nematoda: Filariidae) Parasito de Anoura caudifera (Chiroptera: Phyllostomidae)/ Redescription of Litomosoides brasiliensis Almeida 1936 (Nematoda: Filariiidae) from a new host Anoura caudifera (Chiroptera: Phyllostomidae)

Mourão, Elizabeth D; Avilla, Leonardo dos S; Lent, Herman
2002-06-01

Resumo em inglês The study of the surface topography added details regarding the disposition of male caudal papillae, spicules and area rugosa apart from vulva and oral aperture. The occurrence of this nematode in the state of Amapá represents a new geographical distribution.

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7

Procamallanus brasileiros - parte I (Nematoda, Camallanoidea)/ Brazilian "Procamallanus" (Nematoda, Camallanoidea) part I

Pinto, R. Magalhães; Fabio, Sueli P. de; Noronha, Dely; Rolas, F. J. Tayt-Son
1974-01-01

Resumo em português Nessa primeira parte do trabalho referente ao estudo dos Procamallanus brasileiros, os autores propoêm que Spirocamallanus Olsen, 1952, seja aceito apenas como um bom subgênero, baseando-se exclusivamente no aspecto de cápsula bucal. Assi, Spirocamallanus identifica os camalanídeos de cápsula bucal com lâminas espiraladas ou outras estruturas semelhantes, enquanto que Procamallanus se aplicaria aos de cápsula bucal lisa. Quanto às demais subdivisões existentes pa (mais) ra o gênero, apoiadas em aspecto e quantidade de espículos, são consideradas resultado de um critério bastante arbitrário para conservarem-se válidas, visto serem os espículos caracteres sujeitos a diversas interpretações por parte dos especialistas, devido à fragilidade que os toma tão sujeitos a modificações no grupo dos camalanídeos. Três espécies são aqui tratadas: Procamallanus (Spirocamallanus) rarus Travassos, Artigas & Pereira, 1928, Procamallanus (Spirocamallanus) pimelodus, e Procamallanus (Spirocamallanus) intermedius. As duas últimas são propostas como novas. Procamallanus (S.) pimelodus é comparada a Procamallanus (Spirocamallanus) olseni Campana-Rouget & Razahihelissoa, 1965, dela se distinguindo, principalmente, por apresentar o rebordo da asa caudal franjado e fortemente musculoso. Procamallanus (S.) intermedius aproxima-se unicamente de Procamallanus (S.) rarus, por apresentar o espículo maior com bifurcação distal e dela se afasta pelo maior número e menor espessura das lâminas espiraladas na cápsula bucal. Para Procamallanus (S.) rarus é apresentada a descrição da fêmea, a redescrição do macho, salientando-se pela primeira vez no gênero, o aspecto singular do espículo maior, aspecto esse também observado ao se lidar com Procamallanus (S.) intermedius, depois de se ter tido acesso ao exemplar tipo e único de Procamallanus (S.) rarus. Foram examinadas 31 amostras de material que faz parte da Coleção Helmintológica do Instituto Oswaldo Cruz. Resumo em inglês By introducing this work on brazilian nematodes under Procamallanus Baylis, 1923, the authors propose that Spirocamallanus Olsen, 1952, must be regarded only as a good subgenus based on the aspect of the buccal capsule. For this reason, Spirocamallanus should identify those worms bearing spiral thickenings, as well as similar structures inside their buccal cavity while Procamallanus may be applied every time the nematodes present a completely smooth capsule, lacking the a (mais) bove mentioned structures. Regarding to the early propositions in order to subdivide the genus using number and shape of the spicules as differential characters, the authors fully disagree with this point of view, which is rather a poor criterion, for the spicules are weakly chitinised in this group and for this reason they do not present enough strutural uniformity to be of great systematic significance. The authors deal here with three species: Procamallanus (Spirocamallanus) rarus Travassos, Artigas & Pereira, 1928, Procamallanus (Spirocamallanus) pimelodus and Procamallanus (Spirocamallanus) intermedius. The last two are proposed as new species. Procamallanus (S.) pimelodus is related to Procamallanus (Spirocamallanus) olseni Campanarouget & Razahihelissoa, 1965 and differs from it mainly by its caudal alae which shows a strongly muscular fringed rim. Procamallanus (S.) intermedius only comes nearer to Procamallanus (S.) rarus by possessing the bigger spicule with distal bifurcation and differs from it by the aspect of the buccal capsule which has more and thinner spiral thickenings. Of Procamallanus (S.) rarus, the female is described, a redescription of the male is presented and the very peculiar aspect of the bigger spicule is pointed out for the first time in the genus. This was also observed when dealing with Procamallanus (S.) intermedius, after examining the type of Procamallanus (S.) rarus. In this first part of the work the authors handled 31 samples of nematodes as follows: From intestines of Pimelodus clarias (L.)(27); Catfish (indeterminate)(3) and Pimelodella lateristriga (Müll. Trosch.)(1).

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8

Primeiro registro de Myriastra purpurea (Ridley, 1884) para a costa brasileira (Porifera, Demospongiae)

Moraes, Beatriz Mothes de
1984-01-01

Resumo em inglês The first record of occurrence of Myriastra purpurea (Ridley, 1884) for the South Atlantic Ocean at shallow areas of the Brazilian coast (State of Rio de Janeiro, Sepetiba Bay: 23º04'53"/44º00'34"W and State of Santa Catarina, Porto Belo: 27º09'12"S/48º29'30"W) widely enlarges the distribution of the species, known only from the Indo-Pacific region. Detailed descriptions and ilustrations of the specimens are offered. A table of micrometric measurements and camera lucida drawings of spicules is also offered.

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9

Nematóides que parasitam a soja na região de Bauru/ Nematode parasites of soybean in the Bauru region

Lordello, Luiz Gonzaga E.
1956-01-01

Resumo em português Entre os sérios fatôres que atuam contra a expansão da cultura da soja no Estado de São Paulo, acha-se o representado por nematóides parasitos. Dêstes, os que mais têm atraído a atenção dos cultivadores e fitopatologistas são as espécies formadoras de galhas no sistema radicular (Meloidogyne spp.). O estudo do material atacado coligido em Bauru revelou que, naquela região, três formas se acham envolvidas, a saber : Pratylenchus sp., Meloidogyne incognita (Ko (mais) foid & White, 1919) Chitwood, 1949 e M. javanica bauruensis n. subsp. Neste trabalho é estudada a nova subespécie, sendo também apresentadas algumas observações sobre a população de M. incognita. Resumo em inglês One of the serious detriments to soybean (Glycine max (L.) Merr.) cultivation in the State of S. Paulo, Brazil, are root-parasitic nematodes. A study of infected material collected at Bauru, where at least two distinct soybean varieties were cultivated, disclosed that three forms were involved: a meadow nematode (Pralylenchus sp.) and two root-knot nematodes (Meloidogyne incognita (Kofoid & White, 1919) Chitwood, 1949, and M. javanica bauruensis n. subsp.). Silva, Lordell (mais) o & Miyasaka (3) published some observations about the resistance of several soybean varieties to the attacks by root-knot nematodes in Campinas. A detailed study of the nematodes involved in those experiments, which were considered as related do M. incognita, has not yet been made. One of the varieties tested, La 41-1219, proved to be resistant, thereby providing promising material for further studies and breeding. Unfortunately, such a variety when planted in Bauru, was severely attacked by a root-knot species, which is identified as M. incognita. Attacks by M. javanica bauruensis was not noted in that variety but was noted in another variety (Abura) growing adjacent in the same field. The host preference of those two nematodes was specific and very marked. M. incognita attacked only var. La 41-1219 and M. javanica bauruensis only var. Abura. Invasions by meadow-nematodes were equally observed in the two varieties concerned. In this paper, the study of M. javanica bauruensis n. subsp. is made with all the details possible. It differs from the typical subspecies (M. javanica javanica (Treub, 1885) Chitwood, 1949), in having : a) eggs usually wider (37.0-52.5 : 31.0-40.0 micra); 6) stylet of larvae somewhat longer (11.0-11.6 :10.0 micra); c) neck of larvae longer (b1 = 6.1-6.5 :b = 6.3-8.0); d) head of male with a single post-labial annule instead of the two or three present in the typical subspecies; e) lateral lines in the perineal pattern less evident and not extending to cervical region, with some striae extending unbroken from dorsal to ventral sectors; and, f) higher arch in the perineal pattern, composed of marked wavy to zig-zag striae. In the population studied, several males were found for which the term intersex is applied. The less evident alteration that was seen affects only the shape of the male body, which is considerably thicker in its posterior portion and visibly shorter in its total length. The lateral fields are wider at the latitude of the thick portion, where additional incisures can be counted. In the most advanced case of intersexuality observed besides the same alteration in the shape of the body, there is a vulva and traces of a vagina very well defined. Some data about the M. incognita population obtained in association with M. javanica bauruensis are also presented. - Such a population only differed from that studied by Chitw r ood (1) in having shorter and more slender larvae and males with shorter spicules. Very short males were also observed their total length lying between 690 and 900 micra.

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10

Helmintos parasitos das espécies Scomberomorus cavalla (Cuvier) e Scomberomorus maculatus (Mitchill) do litoral cearense: Contracaecum fortalezae sp. n. (Nematoda, Ascaridoidea)

Klein, Vera Lucia M.
1973-01-01

Resumo em português De nematódeos encontrados parasitando estômago, intestinos delgado e grosso de Scomberomorus cavalla (Cuv.) e Scomberomorus maculatus (Mitch.) o autor propões para o gênero Contracaecum Railliet et Henry, 1912 uma nova espécie, C. fortalezae sp. n., que mais se aproxima de C. clavatum (Rud., 1809) Baylis, 1920 dela se diferenciando por possuir espículos desiguais, um curto ovejetor, útero opistodelfo, ovos menores e por apresentar em todos exemplares estudados ceco intestinal curto e ceco esofagiano longo. Resumo em inglês In this paper the author proposes a new species of the genus Contracaecum Railliet et Henry, 1912. Of the species under Contracaecum, Contracaecum clavatum (Rudolphi, 1809) Baylis, 1920 is the nearest to Contracaecum fortalezae sp. n. differing from the latter by the following aspects: The males have unequal spicules. The females have a short ovijector and parallel uteri directed backward and the eggs are smaller. In both sexes the intestinal cecum is always short and the (mais) ventricular posterior appendix is always long, while Contracaecum clavatum presents these structures in an inverse way, considering the lenght of them. Besides, the thorn-like formations at the posterior end of the body are different.

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11

Estudo das espécies brasileiras do genêro Diplotriaena Henry & Ozoux, 1909 (Nematoda, Filarioidea)

Vicente, J. Júlio; Pinto, R. Magalhães; Noronha, Dely
1983-06-01

Resumo em português Vinte espécies do gênero Diplotriaena Henry & Ozoux, 1909 que ocorrem no Brasil, foram estudadas. A taxonomia desse grupo de nematódeos parasitos de aves é baseada na forma e tamanho dos tridentes e espículos. Para todas as espécies forma registradas suas dimensões, hospedeiros e distribuição regional, através de tabelas comparativas. Comentários a respeito de algumas espécies foram feitos, de modo a fornecer dados adicionais. É também apersentada uma chave para a determinação das espécies. Resumo em inglês Twenty species of Diplotriaena Henry & Ozoux, 1909 that occur in Brazil were studied. The tasonomy of this group of nematode recovered from birds is based mainly on the shape and size of tridents and spicules. For all the species were resistered their dimentions, hosts and regional distribution, condensed in comparative tables. Comments on some of the species were made in order to provide complementary data. A key to Brazilian Diplotriaena is also given.

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