Return to Mars author Ben, 4 letters
Sci-fi author and former Omni editor Ben, 4 letters
The Kinsman Saga author Ben, 4 letters
The Story of Light author, 4 letters
Literary adulteress's surname, 6 letters
Title Madame of a Gustave Flaubert novel, 6 letters
Hollow-horned ruminant, 5 letters
Pertaining to cattle, 5 letters
Pertaining to oxen and goats, 5 letters
Related to buffalo and oxen, e.g., 5 letters
Relating to certain ruminants, 5 letters
Hollow-horned ruminants, 5 letters
Like the god Hathor's features, 6 letters
Some are bullheaded, others smell like an ox, 6 letters
Stock classification, 6 letters
There's one at the beginning of each theme entry, 6 letters
Any of various members of the genus Bos, 6 letters
The four longest answers in this puzzle end in them, 7 letters
And sometimes includes kudu, 7 letters
Term not used technically, 7 letters
Essentially coextensive with genus Bos cattle, 7 letters
Term not used technically, 6 letters