There's no such thing as a "route taxi" or a "share taxi" in English! A маршрутка is a minibus that functions as public transport. In English, it would simply be called a bus, regardless of its size. It's NOT a taxi at all, because you can't ask it to go to where you want it to go. You have to take the bus that goes your way and pay the same fee as all other passengers.
Super confused about маршрутка, the team might want to have one consistent translation for it. It's hard to imagine a shared taxi (I think of Uber Pool here) that's a city bus at the same time...
Actually "маршрутка" is a small city bus. It has its particular route and stops. Despite of the name, it's not a taxi for shure.