Graduate School of Environmental Earth Science, Hokkaido University, Sapporo 060-0810, Japan, Research Institute for Humanity and Nature, Kyoto 603-8047, Japan, Nagano Environmental Conservation Research Institute, Nagano 381-0075, Japan.
Yunnan Key Laboratory of Plant Reproductive Adaptation and Evolutionary Ecology, School of Ecology and Environmental Sciences, Yunnan University, Kunming, China.
Zootaxa. 2021 Dec 8;5079(1):170. doi: 10.11646/zootaxa.5079.1.1.
The phylogeny of the Colocasiomyia cristata species group is reconstructed as a hypothesis, based on DNA sequences of two mitochondrial and six nuclear genes and 51 morphological characters. The resulting tree splits this species group into two clades, one of which corresponds to the colocasiae subgroup. Therefore, a new species subgroup named as the cristata subgroup is established for the other clade. Within the cristata subgroup, three subclades are recognized and each of them is defined as a species complex: the cristata complex composed of five species (including three new ones: C. kinabaluana sp. nov., C. kotana sp. nov. and C. matthewsi sp. nov.), the sabahana complex of two species (C. sabahana sp. nov. and C. sarawakana sp. nov.), and the xenalocasiae complex of five species (including C. sumatrana sp. nov. and C. leucocasiae sp. nov.). There are, however, three new species (C. ecornuta sp. nov., C. grandis sp. nov. and C. vieti sp. nov.) not assigned to any species complex. In addition, breeding habits are described for four cristata-subgroup species, each of which monopolizes its specific host plant. And, data of host-plant use are compiled for all species of the cristata group from records at various localities in the Oriental and Papuan regions. The evolution of host-plant selection and sharing modes is considered by mapping host-plant genera of each species on the phylogenetic tree resulting from the present study.
基于 2 个线粒体基因和 6 个核基因及 51 个形态特征的 DNA 序列，重建了水晶芋组 Colocasiomyia 的系统发育，结果为假设性的。该树将该组分为两个分支，其中一个分支与芋属亚组相对应。因此，另一个分支建立了一个新的种亚组，命名为水晶芋亚组。在水晶芋亚组内，识别出三个亚组，每个亚组都定义为一个种复合体：由五个种组成的水晶芋种复合体（包括三个新种：C. kinabaluana sp. nov.、C. kotana sp. nov. 和 C. matthewsi sp. nov.）、两个种组成的沙巴亚组（C. sabahana sp. nov. 和 C. sarawakana sp. nov.）和五个种组成的 XenaLocasiae 种复合体（包括 C. sumatrana sp. nov. 和 C. leucocasiae sp. nov.）。然而，有三个新种（C. ecornuta sp. nov.、C. grandis sp. nov. 和 C. vieti sp. nov.）未被分配到任何种复合体中。此外，还描述了水晶芋亚组的四个种的繁殖习性，每个种都独占其特定的寄主植物。并且，从东方和巴布亚地区不同地点的记录中，编译了水晶芋组所有种的寄主植物使用数据。通过将每个种的寄主植物属映射到本研究产生的系统发育树上，考虑了寄主植物选择和共享模式的进化。
