P. lapidaria should be introduced to five sites in various regions of the state. Introductions should be monitored. If the species proliferates and become established in three new locales and persists for five years, the species could be downlisted [from Threatened] to SINC [species in need of conservation] status as events that may impact on site would not affect other sites. If populations continue to flourish for ten years, the species could be removed from all lists.
-- Layher, W.G. 2003. Kansas Recovery Plan for the Slender Walker Snail, Pomatiopsis lapidaria (Say) in
Sometime before winter, I plan on heading up to try and visit the Muscotah Marsh and see the Slender Walker Snail for myself. I'll be sure to publish pics when/if I get permission to get on-site.
As I discussed previously, I think many peripheral populations should be conserved, and I think that’s true here too. However, I’m not so confident about introducing them outside their range. Any thoughts?