Here is a selection of some of the readily available crocuses sold as "snow crocuses", "chrysanthus hybrid crocuses" or "species crocuses".
In the top row, left to right, Crocus ancyrensis 'Golden Bunch', 'Goldilocks', maybe 'Fuscotinctus', 'Gipsy Girl', and Crocus olivieri balansae 'Zwanenburg'
In the lower level, left to right, 'Snowbunting', 'Romance', 'Art Schenk', 'Blue Pearl', 'Lady Killer' and 'Spring Beauty'
The name Zwanenburg which appears in some of these names was the name of the homestead where the van Tubergen family started their famous bulb company in the second half of the nineteenth century.
The plant in the middle of the top row was received as 'Zwanenburg Bronze', but that's not what it is. Any ideas? I've called it 'Fuscotinctus' but that's a guess.
'Spring Beauty' is sold as Crocus biflorus isauricus 'Spring Beauty' but it appears to be Crocus minimus.
Note: some of the blossoms shown above are much bigger than others. This is largely but not entirely due to the age of the flower. Some were picked as soon as they emerged above ground, some had been above ground for days and were fully developed. However, the one shown as Crocus olivieri balansae 'Zwanenburg' remains relatively small.