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Relationships of the haematophagous marine snail Colubraria (Rachiglossa: Colubrariidae), within the neogastropod phylogenetic framework ArchiMer
Oliverio, Marco; Modica, Maria Vittoria.
The gastropod genus Colubraria includes marine shallow-water species from tropical, subtropical, and temperate rocky coral environments. At least six species are known to feed on fish blood. Although there is general consensus in placing Colubraria in the Neogastropoda, the actual relationships and the systematic position of Colubraria and related genera are unknown. This is partly the consequence of the lack of a clear phylogenetic framework for the Neogastropoda. This study attempts to propose a phylogenetic framework for the Neogastropoda, by testing: (1) a preliminary phylogenetic arrangement for a large number of recognized neogastropod families; (2) the position of Colubraria within the neogastropods; and (3) the relationships of Colubraria within...
Tipo: Text Palavras-chave: Bayesian inference; Buccinoidea; Cancellarioidea; Conoidea; Maximum Likelihood; Muricoidea; Neogastropoda; Phylogeny; Radula; Systematics.
Ano: 2010 URL: https://archimer.ifremer.fr/doc/00207/31804/30216.pdf
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Estudio Histológico de Boca, Esófago, Estómago e Intestino de Polystira albida (Gastropoda: Turridae) International Journal of Morphology
García-López,Ana Laura; Uria-Galicia,Esther A; Ortiz-Ordoñez,Esperanza.
En la presente investigación se realizó la caracterización histológica del tubo digestivo de Polystira albida (Toxoglossa:Turridae) mediante microscopía óptica, utilizando ejemplares colectados en la Sonda de Campeche. Los resultados del análisis muestran que los labios, la boca y la probóscide presentan un epitelio cilindrico simple ciliado. La cavidad bucal tiene un epitelio cilindrico estratificado. El esófago presenta un epitelio cilindrico simple con células glandulares granulares acidófilas (naturaleza proteica), y es el sitio donde comienza la digestión. El estómago se divide en tres regiones histológicas, y tiene dos tipos de epitelio, uno cilindrico simple ciliado y otro cilindrico simple; el primero está formado por abundantes células glandulares...
Tipo: Journal article Palavras-chave: Tracto digestivo; Conoidea; Turridae; Polystira albida.
Ano: 2007 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022007000400015
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Pharmacological characterization of venoms obtained from Mexican toxoglossate gastropods on isolated guinea pig ileum J. Venom. Anim. Toxins incl. Trop. Dis.
Rojas,A; Feregrino,A; Ibarra-Alvarado,C; Aguilar,MB; Falcón,A; Heimer de la Cotera,E.
The protein-containing extracts prepared from the venom ducts of Conus austini, Conus spurius and Polystira albida caused a concentration-dependent inhibition of spontaneous contractions in guinea pig ileum. The most potent extract was obtained from P. albida venom ducts (IC50 = 0.11 ± 0.02 µg protein/mL). The three extracts produced a moderate inhibition of contractions elicited by acetylcholine (ACh 1 µM), suggesting the presence of anticholinergic compounds. The contractile response elicited by nicotine (10 µM) was significantly reduced by the extracts prepared from the ducts of C. austini and P. albida, which indicates that the venom produced by these species contains toxins that target neuronal nicotinic receptors. All three extracts significantly...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Conoidea; Conus austini; Conus spurius; Guinea pig ileum; Polystira albida; Turridae.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992008000300009
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The anatomy of Cochlespira Conrad (Gastropoda, Conoidea, Turridae) with a description of a new species from the Southeastern coast of Brazil Zoologia
Simone,Luiz Ricardo L..
The anatomy of Cochlespira elongata, a new species from continental slope of São Paulo coast, Brazil, is described. This analysis shows some interesting characters in the foregut, with rhynchodeal walls muscular and free from the haemocoel and insertion of venom gland in mid region of the esophagus; in the osphradium, with bilobed right filaments; and in the penis, with a complex arrangement of structures in the tip. A complementary description of Cochlespira radiata (Dall, 1889a) from Florida, USA, is also given, for a better comparison between both species.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Gastropoda; Conoidea; Turridae; Cochlespira radiata; Systematics.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000100005
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On the oviposition and egg masses of Conus regius (Neogastropoda: Conidae) from northeastern Brazil Biota Neotropica
Gonçalves,Pricila Bento; Lima,Silvio Felipe Barbosa; Oliveira,Geraldo Semer Pomponet; Lucena,Rudá Amorim.
Abstract Characteristics of the egg masses of Conus regius Gmelin, 1791 are described and figured for the first time for the coast of Brazil based on a female specimen found in the process of oviposition during the day in the state of Bahia, northeastern Brazil. Two clusters of egg masses were found in the subtidal zone of Itapuã beach attached to rocky substrate in a completely unprotected site. Oviposition likely began at least one day earlier, since the specimen had already affixed an entire egg mass and was ovipositing a second cluster at the time it was found. The egg masses were arranged in short, irregular rows of three to nine closely spaced capsules in parallel and facing the same direction. One egg mass cluster consisted of 34 capsules. Conus...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Gastropoda; Conoidea; Reproduction; Ootheca; Bahia.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032017000400204
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