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We all chat about Dwarf hamsters, Syrians and Robos, but here is a piece with info about their genus names – for anyone who didn’t know 
Golden Hamsters, or Syrian Hamsters, are officially called Mesocricetus Auretus. They are a rodent belonging to the subfamily Cricetinae. Notably they are not just golden any more either! Different colours have evolved, mutated or been bred.
In Germany they still tend to be referred to as Golden Hamsters, in the UK, as Syrian Hamsters and in the US they can also be known as Black bear hamsters, panda hamsters and similar – but these are all Syrian Hamsters and the same species – just names for different colourways.
https://en.wikipedia.org/wiki/Golden_hamster
Russian Dwarf Hamsters also have genus names.
Of the pedigree species there are:
1. Winter White Russian Dwarf Hamsters with the genus name of Phodopus sungorus, also known as Djungarian hamster, Siberian hamster or Siberian dwarf hamster. “In the wild, they originate from the wheat fields of Kazakhstan, the meadows of Mongolia and Siberia, and the birch stands of Manchuria.” https://en.wikipedia.org/wiki/Winter_white_dwarf_hamster According to the Wikipedia article, they have no fully accepted common name but are often referred to as Winter White dwarf hamster or Russian Dwarf Hamster. Or you may see Winter White Russian dwarf hamster!
2. Campbells Dwarf Hamsters have the genus name Phodopus Campbelli. “It was given its common name by Oldfield Thomas in honor of Charles William Campbell, who collected the first specimen in Mongolia on July 1, 1902.” Commonly named Campbells Dwarf Hamster. If you look at the Wikipedia article, there is often confusion between the Campbells and Winter White hamsters, which can look similar and also confusion with people naming them by the region they come from. https://en.wikipedia.org/wiki/Campbell%27s_dwarf_hamster
3. Hybrid Russian Dwarf Hamsters As the Wikipedia article explains “Of the five species of hamsters kept commonly as pets, only Campbell's dwarf hamster and the winter white dwarf hamster are able to interbreed and produce live hybrid offspring.” As such Hybrid dwarf hamsters don’t have a genus as they have been bred in captivity. They are a hybrid offspring of two genus. They wouldn’t naturally breed in the wild. Hybrids are mentioned in both the Winter White and Campbells Wikipedia links. Commonly referred to as Dwarf Hamsters or Russian Dwarf Hamsters, as the majority of dwarf hamsters sold are hybrids, unless from a pedigree breeder.
4, The Roborovski Hamster – genus name Phodopus Roborovski. Also known as the desert hamster or Robo Hamster. According to Wikipedia it is not actually a dwarf hamster, even though it is the genus phodopus, as it can’t interbreed with other dwarf species. But it’s often referred to as a dwarf hamster or Roborovski Dwarf Hamster, due to its size. https://en.wikipedia.org/wiki/Roborovski_dwarf_hamster
5. The Chinese Hamster – genus name Cricetulus Griseus or Cricetulus barabensis griseus. This is also technically not a dwarf hamster although is sometimes referred to being one due to its size. https://en.wikipedia.org/wiki/Chinese_hamster
There are actually many more species of hamster – 24 according to the RSPCA (see link in resources section). But of those only the five above are commonly kept as pets.

Golden Hamsters, or Syrian Hamsters, are officially called Mesocricetus Auretus. They are a rodent belonging to the subfamily Cricetinae. Notably they are not just golden any more either! Different colours have evolved, mutated or been bred.
In Germany they still tend to be referred to as Golden Hamsters, in the UK, as Syrian Hamsters and in the US they can also be known as Black bear hamsters, panda hamsters and similar – but these are all Syrian Hamsters and the same species – just names for different colourways.
https://en.wikipedia.org/wiki/Golden_hamster
Russian Dwarf Hamsters also have genus names.
Of the pedigree species there are:
1. Winter White Russian Dwarf Hamsters with the genus name of Phodopus sungorus, also known as Djungarian hamster, Siberian hamster or Siberian dwarf hamster. “In the wild, they originate from the wheat fields of Kazakhstan, the meadows of Mongolia and Siberia, and the birch stands of Manchuria.” https://en.wikipedia.org/wiki/Winter_white_dwarf_hamster According to the Wikipedia article, they have no fully accepted common name but are often referred to as Winter White dwarf hamster or Russian Dwarf Hamster. Or you may see Winter White Russian dwarf hamster!
2. Campbells Dwarf Hamsters have the genus name Phodopus Campbelli. “It was given its common name by Oldfield Thomas in honor of Charles William Campbell, who collected the first specimen in Mongolia on July 1, 1902.” Commonly named Campbells Dwarf Hamster. If you look at the Wikipedia article, there is often confusion between the Campbells and Winter White hamsters, which can look similar and also confusion with people naming them by the region they come from. https://en.wikipedia.org/wiki/Campbell%27s_dwarf_hamster
3. Hybrid Russian Dwarf Hamsters As the Wikipedia article explains “Of the five species of hamsters kept commonly as pets, only Campbell's dwarf hamster and the winter white dwarf hamster are able to interbreed and produce live hybrid offspring.” As such Hybrid dwarf hamsters don’t have a genus as they have been bred in captivity. They are a hybrid offspring of two genus. They wouldn’t naturally breed in the wild. Hybrids are mentioned in both the Winter White and Campbells Wikipedia links. Commonly referred to as Dwarf Hamsters or Russian Dwarf Hamsters, as the majority of dwarf hamsters sold are hybrids, unless from a pedigree breeder.
4, The Roborovski Hamster – genus name Phodopus Roborovski. Also known as the desert hamster or Robo Hamster. According to Wikipedia it is not actually a dwarf hamster, even though it is the genus phodopus, as it can’t interbreed with other dwarf species. But it’s often referred to as a dwarf hamster or Roborovski Dwarf Hamster, due to its size. https://en.wikipedia.org/wiki/Roborovski_dwarf_hamster
5. The Chinese Hamster – genus name Cricetulus Griseus or Cricetulus barabensis griseus. This is also technically not a dwarf hamster although is sometimes referred to being one due to its size. https://en.wikipedia.org/wiki/Chinese_hamster
There are actually many more species of hamster – 24 according to the RSPCA (see link in resources section). But of those only the five above are commonly kept as pets.