Marginal ridge absent
11
11. Carapace uniform pale brownish, lacking mottled and blotched pattern, white dots, black ocelli or spots
12
Carapace having mottled and blotched pattern, contrasting or not; white spots or tubercles, black ocelli or spots may be present
13
12. Pale rim of carapace four or five times wider posteriorly than laterally; dark, straight or slightly curved, line connecting anterior margins of orbits
spinifer emoryi, [p. 510]
Pale rim of carapace no more than three times wider posteriorly than laterally