A recent analysis of the genus found there to be 12 valid species.
T. gladius is no longer considered a valid species, however.
At the time, however, the mineral was not recognized as a valid species.
These may be described as valid species in the future.
As of current knowledge, it remains the only other valid European species.
A number of species described during this period have turned out not to be valid species.
Both the valid species and the gold from have been available to Killi-keepers for many years.
A recent genetic study found that it was in fact a valid species, and is probably extinct.
More recent research has shown that it is a valid species.
G27, neither of which were described as valid species.
