The spike should protrude out. Check the thread below.I see. They both have little spikes coming out of the ends of each plate/scale. Are those the spikes you are referring to or something more significant?
Both look cochliodons. The obvious ones externally.I did see that link previous.
Thanks for the suggestion.
Based on the lateral spikes you are referring to, I am assuming they are both Cochliodons?
Is that the clearest distinction between them?