Spanish Mastiff — an AI-generated illustration, not a photograph of a real dog
An AI-generated illustration — not a photograph of a real dog.

Spanish Mastiff

Placed on this panel from 6 sequenced dogs, among 258 breeds.

Measured nearest to Pyrenean Mastiff, and nothing among the other 257 breeds is nearer. The smallest branch holding them both covers 1.1% of this tree.

The 12 breeds nearest to Spanish Mastiff.

The line starts at the tightest pairing this panel holds and ends at the widest separation measured on it, so how far along these marks sit is the answer to how close Spanish Mastiff really is to anything.

Closeness is measured from the genomes, and nothing else. It has no units and no dates. Two breeds sitting close together means their lines separate late in this data. It does not mean either one came from the other.