What is the scientific name for a miniature Yorkie?

There is no scientific name for a miniature Yorkie. The term "miniature Yorkie" is a colloquial term used to describe a Yorkshire Terrier that is smaller than the standard size.

The scientific name for the Yorkshire Terrier is Canis familiaris. This name applies to all breeds of domestic dogs.

The American Kennel Club (AKC) recognizes the Yorkshire Terrier as a single breed, regardless of size. They have breed standards, but no official distinction is made between "miniature" and "standard" Yorkies.

It's important to note that "miniature" is not a breed designation. It simply describes a smaller version of the breed.