Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_13 ( authors VARCHAR, novelty VARCHAR, name VARCHAR )

### Question ###
What is Authors, when Novelty is Gen Et Sp Nov, and when Name is Lanthanocephalus?

### Accurate SQL ###

SELECT authors FROM table_name_13 WHERE novelty = "gen et sp nov" AND name = "lanthanocephalus"