# ชั้นย่อยโอพิสโทแบรนเคีย
## Noun (N)
### Sense: gastropods having the gills when present posterior to the heart and having no operculum: includes sea slugs; sea butterflies; sea hares
- 后鳃亚纲
- 后鳃目
- 软体动物亚纲
- 软体动物类