I would like to suggest a different type name for this trike, and the one shown below.
A tadpole trike is so named because from above, it has the shape of a tadpole, with the widest point about 1/3 of the way back, and tapering to a point at each end. These two trikes don’t fit that shape.
Some might argue that two wheels up front, one in the rear is what makes it a tadpole style trike. How is that like a polywog (tadpole, for all you city boys/girls!)?
It is my suggestion to let these be known as a slingshot style since they start a point in the rear and taper to a wide front end, and look a lot like the old style slingshot dragsters. The MASA Slingshot trike is named for this latter reason.
Slingshot is much more descriptive than tadpole. Velomobiles based on trikes are much more “tadpole” like.