Consulta: creatorFacets:"Absalão,Ricardo Silva"
Registros recuperados: 6
Data/hora: 10/06/2024 08:21:55

Complexo Littorina ziczac (Gmelin) (Mollusca, Gastropoda, Caenogastropoda) no litoral fluminense: análise morfométrica, distribuição vertical e bioquímica
Provedor de dados: 104
Autores: Absalão,Ricardo Silva; Roberg,Renata Alves Pinheiro.
The Littorina ziczac (Gmelin, 1791) species complex was studied in Rio de Janeiro State, southeastern Brazil. The occurrence of three species was confirmed, through the analysis of penis morphology: L. ziczac (Gmelin, 1791), L. lineata d'Orbigny, 1841 and L. lineolata d'Orbigny, 1840. There is a correlation between the morphology of the penis and shell shape, thus it was possible to make a discrimination model based in conchologic data, with an efficiency of 75%. However, this model cannot be applied to others samples that weren't included in its formulation, due to phenotypic plasticity of the shell caused by biotic and abiotic factors. In the 9 areas studied L. lineolata was always the most abundam species. No vertical stratification in the distribution...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Littorina; Species complex; Vertical distribution; Biochemistiy; Rio de Janeiro; Brazil.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000200005

Lista comentada e ilustrada dos Caecidae (Mollusca, Prosobranchia, Mesogastropoda) da Operação Oceanográfica Geomar XII
Provedor de dados: 104
Autores: Gomes,Renata dos Santos; Absalão,Ricardo Silva.
The family Caecidae deserved special attention, among mollusks, because they occurred in more than 50% of studied stations in Oceanographic Operation Geomar XII, which was carried out in northern and southern coasts of Rio de Janeiro and Espírito Santo States (Brazil), respectively. At the time, Caecum brasilicum Folin, 1874, C. aff condylum Moore, 1969, C. circumvolutum Folin, 1867, C. johnsoni Winkley, 1908, C. someri Folin, 1867, C. striatum Folin, 1868, C. venosum Folin, 1867, C. floridanum Stimpson, 1851, C. massambabensis Absalão, 1994, C. butoti Jong &amp;amp; Coomans, 1989, C. ryssotitum Folin, 1867, C. nitidum (Stimpson., 1851) e C. cubitatum (Folin, 1868) were identitíed. C. venosum is reported, for the first time, since its original description,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mesogastropoda; Caecidae; Caecum; Taxonomy; Geographic distribution; Sintopy.
Ano: 1996
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751996000200019

Novas ocorrências de gastrópodes e bivalves marinhos no Brasil (Mollusca)
Provedor de dados: 104
Autores: Absalão,Ricardo Silva; Caetano,Carlos Henrique Soares; Pimenta,Alexandre Dias.
The gastropods Costaclis egregia (Dall, 1889), Thaleia nisonis (Dall, 1889), Tjaernoeia michaeli Engl, 2001 and the bivalves Bathyarca sp., Myonera aff. ruginosa (Jeffreys, 1882) are recorded for the first time in Brazilian waters. This paper presents a brief description of these species and also include ilustrations.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bathyarca; Brazil; Costaclis; Marine mollusks; Myonera; New ocurrences; Thaleia; Tjaernoiea.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752003000200024

Imposex in Olivancillaria vesica vesica (Gmelin) (Gastropoda, Olividae) from a Southeastern Brazilian sandy beach
Provedor de dados: 104
Autores: Caetano,Carlos Henrique Soares; Absalão,Ricardo Silva.
Imposex, the development of male sex organs on the female, is registered and described for Olivancillaria vesica vesica (Gmelin, 1791) at Restinga da Marambaia beach, Rio de Janeiro state, Brazil.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gastropoda; Olividae; Olivancillaria vesica vesica; Imposex; Sandy beaches; Rio de Janeiro; Brazil.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752002000600022

Shell morphometrics in four species of Gadilidae (Mollusca, Scaphopoda) in Southwestern Atlantic Ocean, Brazil
Provedor de dados: 104
Autores: Absalão,Ricardo Silva; Silva,Pedro Henrique de Almeida; Paula,Thiago Silva de.
Six morphometric shell direct measurements of the Gadilidae species Gadila acus (Dall, 1889), Cadulus braziliensis Henderson, 1920, Cadulus parvus Henderson, 1920 and Polyschides tetraschistus (Watson, 1879) were carried out and used to build three morphometric indices in according to the proposition of SHIMEK (1989): LI, relating total shell length to length from the dorsal aperture to the maximum width; WI, relating maximum shell diameter to apertural diameter; and Ws, whorl expansion rate (sensu RAUP 1966). Direct measurements and morphometric indices were tested as discriminating tools among the four species. None of the morphometric indices, alone, were able to discriminate among all species. Among then, Ws is not an effective discriminating...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cadulus; Conchology; Gadila; Marine mollusks; Polyschides.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752005000100020

New records of Tindariopsis (Pelecypoda, Protobranchia) from Brazil - Campos Basin (off Rio de Janeiro)
Provedor de dados: 49
Autores: Benaim,Natalia Pereira; Absalão,Ricardo Silva.
As a part of the Environmental Characterization of the Campos Basin project, we obtained samples from the continental slope benthos. As a consequence, specimens of Tindariopsis aeolata (Dall, 1889) and Tindariopsis agathida (Dall, 1889) were found. These species show prodissoconch surface sculpture patterns that were never seen for species of Tindariopsis. The presence of this kind of sculpture in the type species of the genus, T. agathida, adds diagnostic characters to the genus. T. agathida and T. aeolata are typical from the Caribbean Realm (Guyana and Tobago). This is the first record of T. aeolata in the southernmost area of the Atlantic Ocean, and also the shallowest record (1000 m) for this species. With this finding of specimens from the Bacia de...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Deep-Sea; Bathyspinulidae; Southeast Brazil; Geographical distribution.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032011000300036