On the desmitracheate "micronetine" genus Nippononeta Eskov, 1992 (Araneae, Linyphiidae).
On the desmitracheate "micronetine" genus Nippononeta Eskov, 1992 (Araneae, Linyphiidae).
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作者：
Yan M;Liang X;Tu L
本研究首次确认了“微虫”属Nipponeta Eskov，1992中的去甲鞘系统。这使得该属的亚家族位置成问题。对栗栗纹夜蛾（Nipponeta kurilensis Eskov，1992）（模式种）和朝鲜纹夜蛾（Nipponeta coreana，Paik，1991）进行了形态学研究。利用扫描电镜对该属植物的生殖器、气管系统及部分体细胞特征进行了详细的观察，并与无节叶蜂属进行了比较。本文对日本螺属及其两个种进行了更新描述。提供了Nippononeta和Agyneta的推定的共形，以及这两个属共有的一些推定的共形。结果表明，具花鳞的上雌蕊和具去毛气管系统可能是同源的。Nipponeta和Agyneta在Linyphiidae中的位置需要在未来的研究中解决。
The desmitracheate system in a “micronetine” genus Nippononeta Eskov, 1992 is recognized for the first time in the present study. This makes the subfamilial placement of this genus problematic. A morphological study was conducted for Nippononeta kurilensis Eskov, 1992 (the type species of Nippononeta) and Nippononeta coreana (Paik, 1991). Characters of genitalia and tracheal system, as well as some somatic characters were studied in detail by using scanning electronic microscopy (SEM), and compared with those of Agyneta. Updated descriptions of the genus Nippononeta and its two species are presented. Putative synapomorphies for Nippononeta and Agyneta are provided, as well as some putative synapomorphies shared by the two genera. The results imply that both scaped epigynum and desmitracheate tracheal system are probably homoplastic. The placement of Nippononeta and Agyneta within Linyphiidae need to be resolved in future studies.
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