Mosquitoes grouped in the complex Culex pipiens L. (Diptera: Culicidae) are important vectors of medical and veterinary diseases. In the South American sympatric region, Cx. pipiens and Culex quinquefasciatus Say coexist and potentially hybridize. To identify key drivers of their geographical distribution, mosquito immatures were collected from flower vases of eight urban/rural cemetery pairs within a 5° latitudinal transect along Buenos Aires Province, Argentina. The specimens were identified by molecular methods and their relative proportion modelled as a function of environmental variables. At the beginning of the warm season, northern and southern cemeteries presented exclusively Cx. quinquefasciatus and Cx. pipiens, respectively, with different proportions of both at mid latitudes. By the end of the summer, Cx. quinquefasciatus was present throughout the study area, exclusively in 11 of the 16 cemeteries both rural and urban, whereas Cx. pipiens was predominant only in the southernmost pair. Mean annual temperature, photoperiod variability and time of the season were key drivers of their distributions. All specimens of Cx. pipiens were identified as form molestus and no hybrids were recognized. The reported distribution patterns and the potential absence of Cx. pipiens f. pipiens and hybrids are discussed, along with their implications in disease transmission.

中文翻译：

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一项城乡纬向研究，研究了昆士兰库蚊和淡色库蚊的生物形态在其最南端的同胞条纹中的分布。

在复杂的淡色库蚊（Culex pipiens L。）（双翅目：库蚊科）中分组的蚊子是医学和兽医学疾病的重要媒介。在南美同胞区，Cx。pipiens和Culex quinquefasciatus说共存并可能杂交。为了确定其地理分布的主要驱动因素，从阿根廷布宜诺斯艾利斯省沿5°纬度样带内的八个城市/农村公墓对的花瓶中收集了未成熟的蚊子。通过分子方法鉴定标本，并将其相对比例建模为环境变量的函数。在温暖的季节开始时，北部和南部的墓地专门展示了Cx。quinquefasciatus和Cx。pipiens分别在中纬度具有不同比例。夏末，Cx。在整个研究区中都有quinquefasciatus，仅在16个农村和城市公墓中有11个，而Cx。pipiens仅在最南端的一对中占主导地位。年平均温度，光周期变化和季节时间是其分布的主要驱动力。Cx的所有标本。pipiens被鉴定为mole鼠，未发现杂种。报告的分布模式和潜在的Cx缺失。pipiens f。讨论了pipiens和杂种，以及它们对疾病传播的影响。pipiens被鉴定为mole鼠，未发现杂种。报告的分布模式和潜在的Cx缺失。pipiens f。讨论了pipiens和杂种，以及它们对疾病传播的影响。pipiens被鉴定为mole鼠，未发现杂种。报告的分布模式和潜在的Cx缺失。pipiens f。讨论了pipiens和杂种，以及它们对疾病传播的影响。