there are both dogs. the difference comes from micro changes in the specie.
The species is DOG or Canis lupus familiaris! There can be only one
Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Carnivora Family: Canidae Genus: Canis Species: familiaris
I know that Chihuahuas and Great Danes share the scientific name Canis familiaris. same species. Theoretically, they could produce viable offspring. The easiest way would be in vitro, with a surrogate host for the developing fetus.
Dogs and dingos are considered subspecies of Canis lupus. Leaving them out, the extant species most closely related is Canis latrans, the coyote.
The Canis genus contains our familiar canine species. The Domestic Dog, wolves, jackals, and coyotes are still alive in the genius.
canis lupus canis lupus
Canis Familiaris
Canis lupus familiaris, same as every domestic dog. Dog breeds are cosmetic differences only - no matter how different they are, they are never considered different species.
the wolf species
The red wolf is no longer considered its own species. It is now scientifically named Canis lupus rufus, which means that it is a subspecies of the gray wolf (Canis lupus) and thus does not have its own subspecies.
Canis is the genus name. Familiaris is the sub-species name. What is missing is the species name which is Lupus. Canis Lupus Familiaris is the scientific name for the domestic dog.
Coyotes are of the genus canis, species canis latrans.