What is the terminal command to list USB devices?

In Ubuntu Linux the command lsusb lists all devices connected to the usb ports. What is the equivalent command in OS-X? Thanks.

Linc:
Thanks. The new thread, if you want to comment on it is:
Activate/Deactivate USB connected device
If I am able to deactivate or unattach or disable the driver that is responsible for controlling the usb web cam that I have in my Mac mini, the virtualization program (VBox) would be able to capture it (already configured with the appropriate filter) for my guest OS. Now, I only get a message saying that the camera is busy from a previous request.
When I run your command, I get no response.

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