Spicules
Mostrando 1-12 de 43 artigos, teses e dissertações.
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1. Hatchability of gemmules of two Neotropical freshwater sponges (Porifera: Spongillida)
RESUMO Ambientes de águas continentais estão suscetíveis a condições ambientais extremas, determinantes à evolução de várias estratégias adaptativas para estas condições variáveis. As esponjas de águas continentais produzem corpos resistentes chamados gêmulas, que contêm células totipotentes e espículas especializadas (gemoscleras). As gêm
Iheringia, Sér. Zool.. Publicado em: 10/01/2020
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2. Pudicinae (Nematoda) coparasitic in Proechimys roberti (Rodentia: Echimyidae) from the Brazilian Amazonia: description of a new species of Pudica, redescription of Pudica evandroi (Travassos) and updated key to the species of the genus
Abstract: The re-examination of nematodes collected decades ago from a spiny rat, Proechimys roberti (Echimyidae) from Pará State, revealed the presence of Acanthostrongylus acanthostrongylusTravassos, 1937, and two coparasitic species of Pudica (Heligmonellidae: Pudicinae), one of them new to science. Pudica minima n. sp. mostly resembles Pudica tenuaDuret
An. Acad. Bras. Ciênc.. Publicado em: 11/11/2019
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3. Morphological variation of Aplectana hylambatis (Nematoda: Cosmocercidae) from different anuran hosts and localities in Argentina
Abstract: Aplectana hylambatis is a nematode with a wide geographic distribution and low host specificity. In spite of numerous reports, until this moment, the morphological variations between different hosts and localities have not been studied. We studied 401 specimens collected from five host species from seven localities in Argentina, and examined the fo
An. Acad. Bras. Ciênc.. Publicado em: 02/09/2019
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4. Occurrence of phoresy between Ancistrus multispinis (Actinopterygii: Siluriformes) and Ichthyocladius sp. (Diptera: Chironomidae) in Atlantic forest streams, Southeastern Brazil
ABSTRACT Phoretic relationships often bring large advantages to epibionts. By attaching themselves to mobile hosts, epibionts are able to: expand their ranges without spending energy, reduce their risk of being predated, and increase their probability of finding food. We assessed the phoretic relationship between the siluriform fish Ancistrus multispinis (Re
Zoologia (Curitiba). Publicado em: 28/05/2018
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5. Conservative surgical management of in situ subungual melanoma: long-term follow-up
Abstract Subungual melanoma represents 20% of all melanomas in Hispanic population. Here, we report the outcome of 15 patients with in situ subungual melanoma treated with resection of the nail unit with a 5-mm margin without amputation, followed up for 55.93 ± 43.08 months. The most common complications included inclusion cysts and nail spicules. We found
An. Bras. Dermatol.. Publicado em: 2016-12
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6. Environmental factors related to the production of a complex set of spicules in a tropical freshwater sponge
RESUMO Condições naturais adversas, geralmente, induzirão gemulação nas esponjas de água doce. Devido a essa dependência ambiental, é atribuído excepcional valor às gemoscleras, em estudos taxonômicos, ecológicos e paleoambientais. Outras categorias de espículas, tais como as microscleras e beta megascleras, têm recebido pouca atenção com res
An. Acad. Bras. Ciênc.. Publicado em: 27/11/2015
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7. Scanning electron microscopy of tinea nigra
Tinea nigra is a rare superficial mycosis caused by Hortaea werneckii. This infection presents as asymptomatic brown to black maculae mostly in palmo-plantar regions. We performed scanning electron microscopy of a superficial shaving of a tinea nigra lesion. The examination of the outer surface of the sample showed the epidermis with corneocytes and hyphae a
An. Bras. Dermatol.. Publicado em: 2014-04
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8. A new species of Rhigonema Cobb, 1898 (Nematoda: Rhigonematidae) from a Cuban spirobolid millipede (Diplopoda: Spirobolida)
Rhigonema nesoboli sp. nov. (Nematoda: Rhigonematidae) is described from the gut of Nesobolus piedra (Diplopoda: Rhinocricidae) from Eastern Cuba. The new species is characterized by: the body length of both sexes; the cephalic collar umbelliform; the microtricha large, fine, backwardly directed, extending until the first portion of the intestine; the tail c
Pap. Avulsos Zool. (São Paulo). Publicado em: 2014
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9. Pseudascarophis brasiliensis sp. nov. (Nematoda: Cystidicolidae) parasitic in the Bermuda chub Kyphosus sectatrix (Perciformes: Kyphosidae) from southeastern Brazil
A new species of Pseudascarophis (Nematoda: Cystidicolidae) found in the stomach of Kyphosus sectatrix (Linnaeus) (Kyphosidae), off Rio de Janeiro, Brazil, is described. The new species can be differentiated from the other congeners by the presence of lateral alae, distinct but inconspicuous cephalic papillae at the anterior end, three pairs of precloacal an
Mem. Inst. Oswaldo Cruz. Publicado em: 2013-06
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10. Chondro-osseous respiratory epithelial adenomatoid hamartoma of the nasal cavity
INTRODUCTION: Chondro-osseous respiratory epithelial adenomatoid hamartoma (COREAH) is a benign lesion of the nose and sinuses that is extremely rare, with only 2 cases reported in the literature to date. CASE REPORT: We present herein the third reported case of COREAH, in a 38-year-old woman who presented with left nasal obstruction and a mass in her left n
Int. Arch. Otorhinolaryngol.. Publicado em: 2013-06
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11. Morphological and molecular characterisation of Heliconema hainanensis sp. nov. (Spirurina: Physalopteridae) from congers in the South China Sea, with a key to the species of Heliconema
Heliconema hainanensis sp. nov. collected from Uroconger lepturus (Richardson) (Anguilliformes: Congridae), Muraenesox cinereus (Forsskål) and Congresox talabonoides (Bleeker) (Anguilliformes: Muraenesocidae) in the South China Sea was described using light and scanning electron microscopy. The new species differs from its congeners by the following morphol
Mem. Inst. Oswaldo Cruz. Publicado em: 2013-02
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12. Estratégias e fisiologia do consumo e digestão de esponjas (Porifera) por Echinaster brasiliensis (Echinodermata: Asteroidea) / Strategies and physiology of the consumption and digestion of sponges (Porifera) by Echinaster brasiliensis (Echinodermata: Asteroidea)
Sponges are sessile and have a skeleton made of microscopic inorganic elements (spicules), collagen fibers and/or combinations of these two components. Although without clear physical defenses such as shells or spines, they are not preyed upon, and this is attributed mainly to the presence of active secondary metabolites. Recently, a role of skeletal compone
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/07/2012