There is no individual ownership when you are part of a team, it's the sum of the parts that makes you the RESILIENT team you need to be. 

As a team player, your role is not to shine but to contribute and represent the team. A good manager will recognize your skills and contributions, but it's the team that is made stronger. You need to fight that feeling when someone else replaces your work, and you need to be conscious when you do it yourself to maintain the dynamics and eliminate resentment. It's not about you, but about the team.

This means that when someone is creating something that you believed you had already created, you need to step back and let their efforts be appreciated, and if they fall short, ensure you make it clear you appreciate their efforts and discuss how their work can be leveraged to make things better overall. 

In a corporation, it can become easy to blame another team, point fingers, or call names, but it doesn't benefit anyone. It is especially harmful and low-class to call out another team's weakness to a customer, glaze over anything glaring and help the customer get to a better place while ensuring the other team is informed and has an opportunity to save face if the issue is glaring. Be honest, don't lie, but recognize that your team includes your peers and the corporation as a whole.

There's no place in a team for a king or queen, even the manager does not have that role. A good manager facilitates, guides, and reigns in the teams. Think of it as the humane treatment of a dog team where the lead dog is the manager. They're pulling right with you.