An integrative taxonomic and phylogenetic approach reveals a new genus of Australasian Cycas-pollinating weevils (Coleoptera: Curculionidae: Cossoninae)

IF 4.3 3区 材料科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC
Yun Hsiao, Rolf G Oberprieler
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引用次数: 0

Abstract

Cycas is the second-largest genus of cycads in Australia and the sole cycad genus in Papua New Guinea. In contrast to the other Australian cycads, which are mainly pollinated by weevils of the Tranes group of Molytinae, the Australian Cycas species are pollinated by tiny weevils belonging to the subfamily Cossoninae but representing an unnamed genus. This study evaluates the taxonomic status of these weevils by combining morphological examination with molecular phylogenetic analyses and species delineation based on mitochondrial DNA. The results reveal that the Cycas-pollinating weevils in Australia comprise only one species, here described as Zimmiodes australis gen. et sp. nov., with another species in Papua New Guinea, described as Zimmiodes papuanus sp. nov. The phylogenetic analyses and morphological comparison reveal that Zimmiodes belongs in the tribe Pentarthrini of Cossoninae and that the related Tychiodes group includes not only Tychiodes Wollaston, Tychiosoma Wollaston and Nanoplaxes Heller but also Tyrpetes Heller and is also assignable to Pentarthrini. The conspecificity of Zimmiodes weevils from all Australian Cycas species sampled suggests the likely taxonomic oversplitting of the Australian Cycas species and thus provides new insights into the taxonomy of the Australian cycads.
综合分类学和系统发生学方法揭示了澳大利亚苏铁传粉象鼻虫的一个新属(鞘翅目:卷须科:Cossoninae)
苏铁是澳大利亚第二大苏铁属,也是巴布亚新几内亚唯一的苏铁属。与澳大利亚其他苏铁属植物主要由莫里蒂纳科(Molytinae)Tranes属象鼻虫授粉不同,澳大利亚苏铁属植物由属于科索尼亚科(Cossoninae)但代表一个未命名属的小象鼻虫授粉。本研究通过结合形态学检查、分子系统学分析和基于线粒体 DNA 的物种划分,对这些象鼻虫的分类地位进行了评估。结果显示,澳大利亚的苏铁传粉象鼻虫只有一个种,即 Zimmiodes australis gen.系统发育分析和形态学比较显示,Zimmiodes 属于 Cossoninae 的 Pentarthrini 科,相关的 Tychiodes 群不仅包括 Tychiodes Wollaston、Tychiosoma Wollaston 和 Nanoplaxes Heller,还包括 Tyrpetes Heller,也可归入 Pentarthrini 科。所有取样的澳大利亚苏铁物种的 Zimmiodes 象鼻虫的同种性表明,澳大利亚苏铁物种可能在分类学上过于分裂,从而为澳大利亚苏铁的分类学提供了新的见解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
7.20
自引率
4.30%
发文量
567
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