Reeve’s Pond Turtle (Mauremys reevesii formerly Chinemys r.)
The specise originates in Japan and China. In British Columbia is known fro a few palce such as Beaver Lake and Buttertub on Vancouver Island (Aug 2016).
This turtle was relative common in the pet trade some years back. Most of these were wild-caught specimens, but the supply dried up (or export was prohibited), and they disappeared for about a decade (Rombough C., Pers Comm 2011). It's starting to show up in the market again, this time as captive-bred juveniles.
You can find more information about this species at the Wikipedia Reeves' Pond Turtle site.