Carbajal de la Fuente A L, Catalá S
CRILAR, Mendoza y Entre Rios, Anillaco, 53.1, La Rioja, Argentina.
Mem Inst Oswaldo Cruz. 2002 Dec;97(8):1121-5. doi: 10.1590/s0074-02762002000800010. Epub 2003 Jan 20.
In order to determine if habitat similarity is correlated with a similarity of sensilla pattern, we analyzed six species of Triatominae present in two biogeographic regions of Brazil: the "caatinga" and the "cerrado". In broad terms Triatoma infestans (cerrado) and T. brasiliensis (caatinga) are found in human domiciles, T. sordida (cerrado) and T. pseudomaculata (caatinga) colonize peridomestic habitats, and Rhodnius neglectus (cerrado) and R. nasutus (caatinga) inhabit palm tree crowns. The number and distribution of four sensilla types (bristles, thin and thick walled trichoidea, and basiconica) were compared in these species. Sexual dimorphism of sensilla patterns was noted in T. sordida, T. brasiliensis and T. pseudomaculata. A principal component analysis showed three main groups: (i) species that live in the palms, (ii) domiciliated species and (iii) those living in the peridomestic habitat. T. infestans almost exclusively domestic, was placed at the centre of the canonical map and some individuals of other species overlapped there. These results support the idea that the patterns of antennal sensilla are sensitive indicators of adaptive process in Triatominae. We propose that those species that inhabit less stable habitats possess more types of sensilla on the pedicel, and higher number of antennal sensilla.
为了确定栖息地相似性是否与感器模式的相似性相关，我们分析了巴西两个生物地理区域（“卡廷加”和“塞拉多”）的六种锥蝽。大致来说，侵袭锥蝽（塞拉多）和巴西锥蝽（卡廷加）出现在人类住所，污色锥蝽（塞拉多）和伪黄斑锥蝽（卡廷加）栖息于住宅周边环境，忽视罗蛉（塞拉多）和鼻罗蛉（卡廷加）生活在棕榈树冠层。我们比较了这些物种中四种感器类型（刚毛、薄壁和厚壁毛形感器以及锥形感器）的数量和分布。在污色锥蝽、巴西锥蝽和伪黄斑锥蝽中发现了感器模式的两性异形。主成分分析显示出三个主要组：（i）生活在棕榈树上的物种，（ii）栖息于人类住所的物种和（iii）生活在住宅周边环境的物种。几乎完全生活在人类住所的侵袭锥蝽位于典型图的中心，其他一些物种的个体也重叠于此。这些结果支持了触角感器模式是锥蝽适应性过程敏感指标的观点。我们提出，那些栖息在较不稳定栖息地的物种在梗节上拥有更多类型的感器，且触角感器数量更多。
