Mastiff type means a large molosser dog. The term "mastiff type" has been used synonymously with the term "molosser". For example, the bulldog breeds, the Great Dane, the mountain dogs, the pit bulls and even smaller dogs such as the Boston terrier, may be considered "mastiff types" in this broad sense. The descriptive term, mastiff type, should not be confused with the breed, the Mastiff. All breeds are individual and should be referred to by their breed name to ensure correct identification.
Abruzzese Mastiff, from the Italian region of the Abruzzi
Alpine Mastiff, an extinct Swiss breed
American Mastiff, a breed originating in the United States
Bordeaux Mastiff, or French Mastiff, two alternative names for the Dogue de Bordeaux
Brazilian Mastiff, the Fila Brasileiro
Bullmastiff, a cross between Mastiff and Bulldog
Cão de Gado Transmontano, the Transmontano Mastiff originated in Portugal.
Cuban Mastiff, or Dogo Cubano, an extinct breed of Mastiff
Dogo Argentino, or Argentinian Mastiff, a breed originating in Argentina
Dutch Mastiff or Pug
German Mastiff, better known as Great Dane
Italian Mastiff, better known as Cane Corso
Japanese Mastiff, the Tosa Inu
Korean Mastiff, also known as Dosa Gae
Kumaon Mastiff, a rare breed of dog originating in India
Neapolitan Mastiff or Italian Mastiff, a breed from Naples, Italy
Pakistani Mastiff, the Bully Kutta, from Punjab
Portuguese Mastiff or Alentejo Mastiff, alternative names for the Rafeiro do Alentejo, from Alentejo region of Portugal
Perro de Presa Canario, or Canary Mastiff, from the Canary Islands (bred with English Mastiffs)
Puerto Rican Mastiff, the Gran Mastín de Borínquen
Pyrenean Mastiff, a breed of the Spanish Pyrenees
South African Mastiff, the Boerboel
Genetic research into the dog genome has thus far confirmed the common belief that the Mastiffs share a common ancestor and form a coherent branch on the dog evolutionary tree within the molossers. Historians trace the group to the Molossus, a dog bred by the Ancient Greeks.
As to the extent that Latinate words such as "Dogo" or "Dogge" may be translated as "Mastiffs", molosser breeds such as the Dogo Argentino and Dogo Canario may also be considered "Mastiffs". However, these terms may refer not only to breeds called "Mastiffs" in English, but also to Bulldogs and pit bulls. In addition, historical records of the development of these breeds shows that they have not only Mastiff and other molosser ancestry, but also dogs from several other branches, including sighthounds, terriers, and scenthounds.