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	Provedor de dados 104 (1) 74 (1) 76 (1) 92 (1) Autor Machado,Vilmar (4) Araújo,Aldo Mellender de (2) Araujo,Aldo M. (1) Araújo,Aldo M. de (1) Galián,José (1) Mosmann,Cleri S. (1) Serrano,José (1) Mais... Palavra-chave Chauliognathus (4) Coleoptera (4) Cantharidae (2) Aggregation (1) Assortative mating (1) COI (1) Color polymorphism (1) Colour polymorphism (1) Competition (1) Mimicry (1) Morphometry (1) Müllerian mimicry (1) Phylogeny (1) Yellow-black complex (1) Mais... Tipo do documento Info:eu-repo/semantics/article (4) Ano 2004 (1) 2003 (1) 2001 (2) País Brazil (4) Idioma Inglês (4)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última Phylogenetic relationships and the evolution of mimicry in the Chauliognathus yellow-black species complex (Coleoptera: Cantharidae) inferred from mitochondrial COI sequences 74 Machado,Vilmar; Araujo,Aldo M.; Serrano,José; Galián,José. The phylogenetic relationships of twelve species of Chauliognathus were investigated by studying the mitochondrial cytochrome oxidase I gene. A 678 bp fragment of the COI gene was sequenced to test the hypothesis that the Müllerian mimicry species of the "yellow-black" complex make up a monophyletic clade, separated from species with other colour patterns. The data set was analysed by neighbour-joining, maximum parsimony and maximum likelihood procedures. The results support a single origin of the yellow-black colour pattern during the evolution of the genus, with one main clade formed by Chauliognathus lineatus, C. tetrapunctatus, C. riograndensis, C. flavipes, C. octomaculatus, C. fallax, and another one formed by two species, C. expansus and C sp 1,... Tipo: Info:eu-repo/semantics/article Palavras-chave: Cantharidae; Chauliognathus; COI; Coleoptera; Müllerian mimicry; Phylogeny; Yellow-black complex. Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000100010 The aggregation of Chauliognathus species (Coleoptera, Cantharidae) and its possible role for coexistence and mimicry 76 Machado,Vilmar; Araújo,Aldo Mellender de. The relative population sizes of a species complex of Chauliognathus are reported, as well as their spatial distribution associated with different patches of food plants. Field work was done at Fazenda Santa Isabel, municipality of Guaíba, State of Rio Grande do Sul, Brazil. The results suggest that two mechanisms account for the reduction in food competition among the species involved: one is asynchrony in the appearance of the species in the area, and the other is aggregation in different patches of food plants. Since the species here reported show a similar colour pattern (yellow-black) the possibility of the occurrence of serial mimicry in this complex of species is dicussed. Tipo: Info:eu-repo/semantics/article Palavras-chave: Chauliognathus; Aggregation; Competition; Mimicry; Coleoptera. Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212001000200002 Elytra colour polymorphism and randomness of matings in Chauliognathus fallax Germar 1824 from southern Brazil (Coleoptera, Cantharidae) 92 Machado,Vilmar; Araújo,Aldo Mellender de. Beetles of the species Chauliognathus fallax Germar 1824 are polymorphic for elytron colouration with six morphs distinguished on the basis of black pigmentation on a yellow background. We investigated samples of C. fallax taken in eight consecutive weeks aiming to determine the frequency of the morphs which were grouped, for statistical analysis, into three classes according to elytra pigmentation as well as the possible occurrence of assortative mating. Our results showed a variation in the frequency of the classes throughout the season, both in males and females, with the maximum frequency of each class at the fourth and fifth week. The three classes (A, B, C) showed the same pattern of variation, and class B was always the more frequent. To test... Tipo: Info:eu-repo/semantics/article Palavras-chave: Assortative mating; Chauliognathus; Coleoptera; Colour polymorphism. Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262003000300008 Morphometric analysis, mimicry, and color polymorphism in five species of Chauliognathus Hentz (Coleoptera, Cantharidae) 104 Machado,Vilmar; Araújo,Aldo M. de; Mosmann,Cleri S.. This study presents data on morphometric variation for length and width of elytra in tive sympatric species of the genus Chauliognathus Hentz, 1830: C. flavipes Fabricius, 1781, C. octomaculatus Pie, 1915, C. expansus Waterhouse, 1878, C. fallax Germar, 1824 and C. lineatus Zwetsch & Machado, 2000. The meaning of this variation is discussed in the light of the theory of mimicry and visual communication between prey and predator. Females are larger than males in all species, except C. expansus. The analysis of variance for length of elytron as well as for width showed that the differences between species are significant for males and females; significant interaction (sex x species) was also found. The similarity in color pattern of these species, as... Tipo: Info:eu-repo/semantics/article Palavras-chave: Coleoptera; Cantharidae; Chauliognathus; Morphometry; Color polymorphism. Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000300007 Registros recuperados: 4 Primeira ... 1 ... Última

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