Accordingly , the subspecies tetrataenia was reaffirmed for the San Francisco garter snake and the races concinnus and infernalis retain their historical definition .
In 2000 , the ICZN agreed and voted to retain the historical taxonomic arrangement of subspecies within this evolutionary lineage .
The subspecies tetrataenia was reaffirmed for the San Francisco garter snake and the races concinnus and infernalis retain their historical definition .
In 2000 , the ICZN agreed and voted to retain the historical taxonomic arrangement of subspecies within this evolutionary lineage .