What unit has gen et sp nov as the novelty?
CREATE TABLE table_name_51 (unit VARCHAR, novelty VARCHAR)
SELECT unit FROM table_name_51 WHERE novelty = "gen et sp nov"
### Context: CREATE TABLE table_name_51 (unit VARCHAR, novelty VARCHAR) ### Question: What unit has gen et sp nov as the novelty? ### Answer: SELECT unit FROM table_name_51 WHERE novelty = "gen et sp nov"