Department of Invertebrate Systematics and Ecology, Wrocław University of Environmental and Life Sciences, Kożuchowska 5B, 51-631, Wrocław, Poland.
Jalal Afshar Zoological Museum, Department of Plant Protection, Faculty of Agriculture, University of Tehran, Karaj, Iran.
Exp Appl Acarol. 2019 Aug;78(4):485-504. doi: 10.1007/s10493-019-00400-5. Epub 2019 Jul 10.
Morphology-based identification of Allothrombium spp., in view of the limited knowledge of intraspecific variation, hinders the recognition of species borders and affects the views on the actual distribution of species. Therefore, identification will benefit from reference to molecular methods. The separate species identity of specimens putatively representing Allothrombium fuliginosum and A. pulvinum, both reported as widely distributed in the Palaearctic region and considered as potential biological control agents, was checked using morphological and molecular analyses. The representatives of various Allothrombium spp. collected in the Palaearctic were included in the analysis in order to ascertain the distance between species. The results of the morphological examination, supported by statistical inference, along with the comparison of COI and/or ITS2 sequences, weaken the hypothesis of synoccurrence of both species in the Palaearctic region. Hence, we hypothesize that A. fuliginosum is widely distributed in the Palaearctic, whereas A. pulvinum should be regarded a Nearctic species.
鉴于种内变异的知识有限，基于形态的 Allothrombium spp. 鉴定方法阻碍了对物种边界的识别，并影响了对物种实际分布的看法。因此，鉴定将受益于分子方法的参考。使用形态学和分子分析方法检查了假定代表 Allothrombium fuliginosum 和 A. pulvinum 的标本的单独物种身份，这两种物种均被报道广泛分布于古北区，被认为是潜在的生物控制剂。为了确定物种之间的距离，分析中包括了古北区收集的各种 Allothrombium spp. 的代表。形态学检查的结果，辅以统计推断，以及 COI 和/或 ITS2 序列的比较，削弱了这两个物种在古北区同时出现的假设。因此，我们假设 A. fuliginosum 广泛分布于古北区，而 A. pulvinum 应被视为近北极物种。
