Mem Inst Oswaldo Cruz. 2013 Sep;108(6):778-84. doi: 10.1590/0074-0276108062013015.
The cuticular hydrocarbons of the Triatoma sordida subcomplex (Hemiptera: Reduviidae: Triatominae) were ana-lysed by gas chromatography and their structures identified by mass spectrometry. They comprised mostly n-alkanes and methyl-branched alkanes with one-four methyl substitutions. n-alkanes consisted of a homologous series from C21-C33 and represented 33-45% of the hydrocarbon fraction; n-C29 was the major component. Methyl-branched alkanes showed alkyl chains from C24-C43. High molecular weight dimethyl and trimethylalkanes (from C35-C39) represented most of the methyl-branched fraction. A few tetramethylalkanes were also detected, comprising mostly even-numbered chains. Several components such as odd-numbered 3-methylalkanes, dimethylalkanes and trimethylalkanes of C37 and C39 showed patterns of variation that allowed the differentiation of the species and populations studied. Triatoma guasayana and Triatoma patagonica showed the most distinct hydrocarbon patterns within the subcomplex. The T. sordida populations from Brazil and Argentina showed significantly different hydrocarbon profiles that posed concerns regarding the homogeneity of the species. Triatoma garciabesi had a more complex hydrocarbon pattern, but it shared some similarity with T. sordida. The quantitative and qualitative variations in the cuticular hydrocarbons may help to elucidate the relationships between species and populations of this insect group.
对 sordida 亚复合组（半翅目：红蝽科：三锥虫科）的角质层烃进行了气相色谱分析，并通过质谱法确定了其结构。它们主要由 n-烷烃和具有一个至四个甲基取代的支链烷烃组成。n-烷烃由 C21-C33 的同系物组成，占烃类馏分的 33-45%；n-C29 是主要成分。支链烷烃显示 C24-C43 的烷基链。高分子量的二甲基和三甲基烷烃（C35-C39）代表了大部分支链烷烃。还检测到一些四甲基烷烃，主要由偶数链组成。一些成分，如奇数的 3-甲基烷烃、C37 和 C39 的二甲基烷烃和三甲基烷烃，表现出变异模式，允许区分所研究的物种和种群。sordida 亚复合组内的 guasayana 和 patagonica 表现出最独特的烃类模式。巴西和阿根廷的 T. sordida 种群表现出明显不同的烃类分布，这对该物种的同质性提出了关注。garciabesi 具有更复杂的烃类模式，但与 sordida 有一些相似之处。角质层烃的定量和定性变化可能有助于阐明该昆虫组的物种和种群之间的关系。
