直神經類

{{Automatic taxobox
| image = Snail-WA papa edit.jpg
| image_caption = **'
| taxon = Euthyneura
| authority = Spengel, 1881
| diversity_ref = have redefined major groups within the Heterobranchia and a 支序图 showing phylogenic relations of Euthyneura is as follows:

2016年分類
Kano et al. (2016)提出以新的分類單元露齒裸側群（Ringipleura），包括有露齿螺科（Ringiculoidea）和裸側類（Nudipleura），使之成為姊妹分類
}}

外部連結
This article incorporates CC-BY-2.0 text from the reference