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Showing 1 to 20 of 31 for “"Cnidaria"”.
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Comportamento reprodutivo de Mussismilia hispida (Verril, 1902) (Cnidaria, Anthozoa, Scleractinia)
Through histological analysis the reproductive pattern of Mussismilia hispida, a zooxanthellate coral species endemic to the Brazilian coast was verified. Fragments from 2 tagged colonies, which were marked in the field in order to be repeatedly sampled, and 10 others haphazardly chosen were …
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Revisão taxonômica do gênero Thesea (Cnidaria: Octocorallia) do Atlântico Ocidental
The study of genus Thesea Duchassaing & Michelotti, 1864, was done by the examination of type material of its species. The name Thesea presents nomenclatural problems concerning the designation of type species. An identification key, illustrations, and diagnosis of validated species are given. The …
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Aspectos morfológicos e microanatômicos das espécies brasileiras de Mussidae Ortmann, 1890 (Cnidaria, Scleractinia)
In the purpose of extend the character used in Scleractinian systematic, it was done a descriptive study of different aspects of the polyp microanatomy and cnidom of four species of Mussidae. Three species belonging to the Brazilian genus Mussismilia: M. hispida (Verrill, 1868), M. braziliensis …
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Octocorallia (Cnidaria: Anthozoa) da plataforma continental e ilhas oceânicas brasileiras: famílias Paramuriceidae e Plexauridae
Fourteen species of octocorals, from the Brazilian continental platform and oceanic islands, from depths between 20 and 400m, were studied regarding aspects of their taxonomy, bathymetry, and geographical distribution. These species included nine Paramuriceidae (Bebryce cinerea, Bebryce sp., …
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Identificação dos coralitos de pólipos fundadores de corais recifais do Brasil (Cnidaria, Anthozoa, Scleractinia)
To study an organism's life history, it is important to identify them throughout their life cycle. ln corals, a complicating factor is the difficulty of identification at their initial stages. The taxonomy of corais is based on skeletal structures present in the adults. The purpose of this study …
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Taxonomia Integrativa morfo-molecular das espécies de zoantídeos do gênero Protopalythoa (Cnidaria: Anthozoa) em Pernambuco
Zoantídeos são cnidários comuns de águas rasas em todo o mundo e no Brasil compõe a maioria das comunidades de ambiente recifal, principalmente no nordeste brasileiro. Apesar de abundantes são ainda pouco estudados. Apresentam história taxonômica confusa e com descrições vagas. Dentre os gêneros …
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Morfologia e taxonomia das espécies do gênero Discosoma Ruppell & Leuckart, 1828 (Cnidaria, Corallimorpharia) no Brasil
This work aims to describe the species of the genus Discosoma Rüppell & Leuckart, 1828 (Corallimorpharia, Discosomatidae), from the Brasilian coast. There is only one record of the species Discosoma carlgreni (Watzl, 1922) in the north of Espirito Santo, Brazil ( SCHLENZ & BELÉM, 1892). Since then …
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Variação morfológica dos esqueletos de Montastraea cavernosa (Linnaeus, 1767) e Favia gravida Vernill, 1868 (Cnidaria, Scleractinia)
Morphological variability is a widespread but poorly understood characteristic of many colonial animals. Skeletal variations of Montastraea cavernosa from Brazil, Abrolhos (BA), Tamandaré (PE) and Mexico, Puerto Morelos (Q.ROO) and variations of Favia gravida from Brazil, Abrolhos, Tamandaré and …
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Variação de formas de crescimento de Montastraea cavernosa (Linnaeus, 1767) (Cnidaria, Anthozoa, Scleractinia): uma abordagem modular
Clonal animals grow through addition of functional units (zooids), whose assemblage constitutes a colony. The modular approach consists in describing colony form from the arrangement and size of modules. The modular approach was used here to access variations in growth forms of the coral …
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Esforço reprodutivo de Mussismilia braziliensis (Verrill, 1868) (Cnidaria, Scleractinia, Mussidae) no complexo recifal dos Abrolhos, BA, Brasil
Mussismilia braziliensis is endemic to Bahia State. lt plays an important role as one of the major reef builders in the area. Ten fragments of colonies were collected at three sites in the Abrolhos Reef Complex, located at different distances from the coast. Reproductive effort was estimated …
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An ultrastructural study of gametogenesis and early development in the sea anemone <i>Actinia fragecea</i> (Cnidaria : Anthozoa)
Large Individuals of the sea anemone <i>Actinia fragacea</i> were collected at approximately monthly intervals over a two year period. Their gonads were examined by light and electron microscopy, in order to follow the gametogenic process. The sexes are separate, and both show an annual cycle of …
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Integrating genomic, transcriptomic and developmental approaches to investigate coloniality and life cycle evolution in the Hydractiniidae (Hydrozoa: Cnidaria)
… of prominent life history characters of the cnidarian class Hydrozoa, including the transition from solitary to colonial forms, an elaboration of coloniality known as polyp polymorphism, and medusae (jellyfish) evolution and loss. While these characters have been repeatedly explored …
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Estudo sistemático de duas espécies de Acontiaria (Cnidaria, Anthozoa, Actiniaria) da Baía de Guanabara, Rio de Janeiro, Brasil
Two species of sea anemones (Cnidaria, Anthozoa, Actiniaria) from Guanabara Bay, Rio de Janeiro, Brazil, were studied. They are both from the subtribe Acontiaria Carlgren (in Stephenson, 1935). These anemones are Haliplanella lineata (Verrill, 1869) and a new genus, new species, both of the family …
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Microanatomia e sistemática das espécies de Zoanthus Lamarck, 1801 (Cnidaria, Anthozoa, Zoanthidea) do litoral e ilhas oceânicas do Brasil
The species of Zoanthus Lamarck, 1801, that occur on the coast and oceanic islands of Brazil are surveyed and redescribed. Four species are involved: Zoanthus sociatus (Ellis, 1767) is widely distributed from Ceará to São Paulo and also occur on Atol das Rocas, Fernando de Noronha Island and …
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Screening farmacológico e diversidade bacteriana do muco de Palythoa caribaeorum (Cnidaria, Anthozoa) da praia de Porto de Galinhas-PE, Brasil
Palythoa caribaeorum (baba-de-boi) é um cnidário marinho que secreta um muco viscoso o qual apresenta propriedades farmacológicas e abriga uma série de bactérias com potencial de aplicação biotecnológica. No presente trabalho, objetivou-se obtenção desses micro-organismos associados ao muco de …
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Comunidades recifais do Arquipélago dos Abrolhos, BA, com ênfase em corais (Cnidaria: Scleractinia e Milleporidae): aspectos metodológicos e comparações entre locais
The quantification of coral communities in three areas in the Abrolhos Archipelago (northern and southern inshore areas in Santa Bárbara Island, and Siriba Island) was performed using quadrats and intercept line transect methods. Colony size and inclination, the distances from random points to the …
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Estudo estrutural e alguns aspectos ultraestruturais de ciliados comensais de invertebrados marinhos do litoral do Estado do Rio de Janeiro
… with marine invertebrates of the phyla Cnidaria, Mollusca and Echinodermata collected from litoral area of the state of Rio de Janeiro, Brazil. The Cnidaria (Anemonia sargassensis, Phylactis flosculifera and Bunodosoma caissarum) lodged in the gastrovascular cavities the Trofont of …
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Understanding the evolution of the apical organ in the early branching metazoan, Nematostella vectensis
… of the apical organ and wider apical domain in cnidarian larvae, with a particular focus on Nematostella vectensis. As an early-branching metazoan, N. vectensis is a unique model for studying evolution of the apical organ, and subsequently the origins of the nervous system. Through generating …
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Molecular Evolution in non-bilaterian Metazoa with Emphasis on Phylum Porifera
… innerhalb der Metazoa (Porifera, Placozoa, Cnidaria and Ctenophora) sind noch immer nicht abschliessend geklärt und Gegenstand wissenschaftlicher Diskussionen. Ein Grund für unser fehlendes Verständnis ist die einfache Organisation dieser Tiere, die nur wenige informative morphologische …
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