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| Viana,Marina Gomes; Rocha-Barreira,Cristina de Almeida. |
| Adult animals of Spondylus americanus were analyzed and specialized sensorial structures, the sensorial papillae and the eyes, were characterized. The sensorial papillae were projections on the edge of the mantle in form of light brown fingers which had function of percepting stimulus coming from the medium. They were constituted by loose conjunctive tissues with longitudinal muscular fibers and externally covered by ciliated cubic epithelium, which presented high amount of melanocytes that gave the coloration of the papillae. The eyes were more complex, being on small stalks histologically similar to the papillae. They exhibited a circular formate and had a metallic blue color. Theses structures were constituted by a corneo epithelium, cornea, lens,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mollusca; Scallops; Eyes; Brazil. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000500009 |
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| Almeida,Rosana de; Soares,Ademilson Espencer Egea. |
| The dark coloration of insects eyes is attributed to the accumulation of the brown pigment insectorubin, a mixture of ommochromes, xanthommatin and several ommins, biosynthesized from tryptophan. When any of the events in the synthesis chain is interrupted, formation and accumulation of pigments other than insectorubin occurs, and a new eye color will appear. The aim of the present work is to evaluate the longevity of worker honey bees Apis mellifera, homozygous and heterozygous for the mutant alleles cream (cr), snow-laranja (s la) and brick (bk). Eye pigmentation and average longetivity of bees are very closely related. Mutant bees carrying lighter eye pigmentation are unable to return to the hive; there is, therefore, a close association between the eye... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eyes; Mutants; Cream; Snow-laranja; Brick. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000200011 |
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