División Entomología, Museo de La Plata, Universidad Nacional de La Plata, CONICET, La Plata, Buenos Aires, Argentina.
PeerJ. 2022 Feb 9;10:e12913. doi: 10.7717/peerj.12913. eCollection 2022.
The weevil genus del Río (Curculionidae: Entiminae: Naupactini) is distributed in the northern Andes, in Colombia and Ecuador. Among its species, stands out as an important pest of potatoes in its parthenogenetic form, which is known as "tiroteador de la papa". In this study, the adult male and the larval stage (first and mature larvae) of are described and illustrated for the first time. A description of the male of is also provided. A new bisexual species was discovered, sp. nov., and is described from Ecuador. An updated phylogenetic analysis was performed, including the new species, with results indicating a sister group relationship between and They can be distinguished because the former is usually of smaller size and is covered by denser and thicker setae, has shorter antennae, a subcylindrical shape of the pronotum, shorter elytra (about 1.5×longer than wide at base), the female has ventrite 4 with a posterior rounded projection, and posterior margin of ventrite 5 subacute, not excavated. This paper also includes lectotype designations, a revised key to all known species of habitus photos of males and females, illustrations of genitalia, and a distribution map
里氏象甲属（Curculionidae：Entiminae：Naupactini）分布于北安第斯山脉，包括哥伦比亚和厄瓜多尔。其物种中，以其孤雌生殖形式的马铃薯重要害虫而闻名，被称为“马铃薯枪手”。在这项研究中，首次对里氏象甲的成虫雄性和幼虫期（第一和成熟幼虫）进行了描述和说明。还提供了里氏象甲雄性的描述。在厄瓜多尔发现了一种新的两性物种，即 sp. nov.，并对其进行了描述。进行了更新的系统发育分析，包括新物种，结果表明 和 是姐妹群关系。它们可以通过以下特征区分开来：前者通常体型较小，被更密集和更厚的刚毛覆盖，触角较短，前胸呈近圆柱形，鞘翅较短（约基部宽的 1.5 倍长），雌性第五腹节后缘呈亚锐角，不凹陷。本文还包括了模式标本的指定、所有已知里氏象甲属物种的修订关键、雄性和雌性形态照片、生殖器插图以及分布地图。
