Abstract The larvae of the Australian endemic species Chostonectes gigas (Boheman, 1858) and C. johnsonii (Clark, 1862) are described and illustrated for the first time, with detailed morphometric and chaetotaxic analyses of the cephalic capsule, head appendages, legs, last abdominal segment and urogomphi. A parsimony analysis based on 83 informative larval characteristics of six species in four genera of the subtribe Sternopriscina was conducted using the program TNT. The monophyletic origin of the four Sternopriscina studied was strongly supported. Members of Paroster Sharp, 1882 characterise by the presence of three labial palpomeres, a unique feature within the subfamily Hydroporinae. Larvae of Barretthydrus Lea, 1927, Antiporus Sharp, 1882 and Chostonectes Sharp, 1882 evolved the presence of natatory setae on femora, tibia and tarsi. At the moment, Chostonectes is postulated to be closely related phylogenetically to Antiporus in the context of this study.

中文翻译：

---

澳大利亚辐射 Sternopriscina（鞘翅目：Dytiscidae，Hydroporinae）的幼虫形态：Chostonectes Sharp 属的描述和系统发育定位，1882

摘要 首次描述和说明了澳大利亚特有物种 Chostoneectes gigas（Boheman，1858 年）和 C. johnsonii（Clark，1862 年）的幼虫，并对头囊、头部附属物、腿、最后腹段和urogomphi。使用程序 TNT 进行了基于 Sternopriscina 亚部落 4 个属中 6 个物种的 83 个信息幼虫特征的简约分析。强烈支持所研究的四种 Sternopriscina 的单系起源。Paroster Sharp, 1882 的成员以三个唇瓣的存在为特征，这是 Hydroporinae 亚科中的一个独特特征。Barretthydrus Lea 的幼虫，1927 年，Antiporus Sharp，1882 年和 Chostonectes Sharp，1882 年在股骨、胫骨和跗骨上进化出游动刚毛的存在。