Prat N, Paggi A, Ribera C, Acosta R, Ríos-Touma B, Villamarín C, Rivera F, Ossa P, Rieradevall M
Freshwater Ecology and Management Research Group, Dept de Biologia Evolutiva, Ecologia i Ciències Ambientals, Univ de Barcelona, Barcelona, Spain.
Instituto de Limnología "Dr. R. A. Ringuelet" (ILPLA, CONICET, UNLP), La Plata, Argentina.
Neotrop Entomol. 2018 Apr;47(2):256-270. doi: 10.1007/s13744-017-0548-5. Epub 2017 Sep 13.
The genus Oliveiriella (Chironomidae, Orthocladiinae) was erected by Wiedenbrug & Fittkau (1997). The adults have characteristic black spots on their wings and other characteristics similar to the genus Cricotopus. Pupal skins are very characteristic with strong short spines in the anal lobe instead of setae, while larvae are distinguishable by the long anal papillae and the intense blue color of their body. However, Andersen et al (2013) consider Oliveiriella as a subgenera of Cricotopus. In this paper, using the sequences of the cox1 gene, we conclude that Oliveiriella should be considered a subgenus within Cricotopus, confirming its status in Andersen et al (2013). Furthermore, we describe Cricotopus (Oliveiriella) rieradevallae Prat & Paggi sp. n. from the Saltana river (Ecuador). The adult males, females, and preimaginal stages of the two species of subgenus Oliveiriella known from South America Cricotopus (O.) almeidai n. comb. from Peru, Brazil, and Argentina and Cricotopus (O.) sanjavieri n. comb. from Argentina are compared with those of Cricotopus (O.) rieradevallae sp. n. from Ecuador. The differences allow the distinction of the three species. The cox1 gene reveals that at least three different undescribed species of the same subgenus are present in the high-altitude tropical Andes. The morphology of the available pupae and pupal exuviae reveals the presence of several morphotypes that are candidates to be described as new species. A key used to distinguish these pupal morphotypes is provided, including the three described species. Additionally, the distribution of the subgenus is discussed.
奥利维耶摇蚊属（摇蚊科，直突摇蚊亚科）由维登布鲁格和菲特考于1997年建立。该属成虫翅膀上有特征性的黑斑，还有一些与环足摇蚊属相似的特征。蛹皮非常独特，肛叶上有粗壮的短刺而非刚毛，而幼虫则以长肛乳突和身体强烈的蓝色为特征。然而，安徒生等人（2013年）认为奥利维耶摇蚊属是环足摇蚊属的一个亚属。在本文中，通过细胞色素氧化酶亚基1（cox1）基因序列，我们得出结论，奥利维耶摇蚊属应被视为环足摇蚊属内的一个亚属，这证实了其在安徒生等人（2013年）研究中的地位。此外，我们描述了来自萨尔塔纳河（厄瓜多尔）的里拉德瓦莱氏环足摇蚊（奥利维耶摇蚊亚属）新种。将南美洲已知的奥利维耶摇蚊亚属的两个物种，即来自秘鲁、巴西和阿根廷的阿尔梅达氏环足摇蚊（奥利维耶摇蚊亚属）新组合种以及来自阿根廷的桑贾维里氏环足摇蚊（奥利维耶摇蚊亚属）新组合种的成虫雄性、雌性和预成虫阶段，与来自厄瓜多尔的里拉德瓦莱氏环足摇蚊（奥利维耶摇蚊亚属）新种进行了比较。这些差异使得这三个物种得以区分。cox1基因显示，在高海拔热带安第斯山脉中至少存在同一亚属的三种不同未描述物种。现有的蛹和蛹蜕的形态表明存在几种形态型，它们有可能被描述为新物种。本文提供了一个用于区分这些蛹形态型的检索表，包括上述三种已描述的物种。此外，还讨论了该亚属的分布情况。
