Departamento de Biodiversidad y Gestin Ambiental. Universidad de Len, 24071 Len (Spain). .
Departamento de Biodiversidad y Gestin Ambiental, Universidad de Len. 24071 Len (Spain).
Zootaxa. 2022 Sep 12;5183(1):22-48. doi: 10.11646/zootaxa.5183.1.5.
We examined 1367 apterous viviparae from 151 samples to study Aphis craccivora, A. tropaeoli and a third, possibly new species in Argentina, resembling both. Principal component analysis (PCA), followed by hierarchical clustering of principal components (HCPC), revealed clusters based on 33 morphological characters of 206 selected specimens. The delimitation of possible taxonomic entities was assessed by logistic regression. PCA confirmed that A. tropaeoli is a valid species. HCPC revealed the existence of a new species distinct from A. craccivora. Recently published data on the variability of A. craccivora, mainly regarding Asian populations, are presented and discussed; the general appearance of the sexuals of this species is also presented. The new species is described with the name Aphis mirabilis Nieto Nafra and Ortego sp. n., based on apterous and alate viviparae, oviparae, and males collected in Mendoza and Neuqun (Argentina) on Adesmia volckmannii (Fabaceae), Atriplex nummularia and At. lampa (Amaranthaceae), Bougainvillea spinosa (Nyctaginaceae), and Robinia pseudoacacia (Fabaceae). This new species has also been collected on plants of another 18 species from 8 additional families, although these specimens are not included in the type series. Features to distinguish A. mirabilis Nieto Nafra and Ortego sp. n. from A. craccivora are presented together with a logistic regression model. The males of A. tropaeoli are described. The list of host plants of A. craccivora in Argentina is updated.
我们从 151 个样本中检查了 1367 只无翅胎生蚜，以研究阿根廷的 Aphis craccivora、A. tropaeoli 和可能的第三种新物种，这两种物种与第三种新物种相似。主成分分析（PCA），接着是主成分的层次聚类（HCPC），根据 206 个选定标本的 33 个形态特征，揭示了基于聚类的结果。通过逻辑回归评估了可能的分类实体的划分。PCA 证实 A. tropaeoli 是一个有效的物种。HCPC 显示存在一种与 A. craccivora 不同的新物种。还提出和讨论了最近发表的关于 A. craccivora 变异性的数据，主要是关于亚洲种群的；还介绍了该物种性别的一般外观。新物种被描述为 Aphis mirabilis Nieto Nafra 和 Ortego sp. n.，基于无翅和有翅胎生蚜、产卵蚜和雄性蚜，采集自阿根廷门多萨和 Neuqun 的 Adesmia volckmannii（豆科）、Atriplex nummularia 和 At. lampa（苋科）、Bougainvillea spinosa（紫茉莉科）和 Robinia pseudoacacia（豆科）。在另外 8 个科的 18 种植物上也采集到了这种新物种的标本，尽管这些标本未包含在模式系列中。呈现了将 A. mirabilis Nieto Nafra 和 Ortego sp. n. 与 A. craccivora 区分开来的特征，以及逻辑回归模型。还描述了 A. tropaeoli 的雄性蚜。更新了阿根廷 A. craccivora 的寄主植物清单。
