| 21. | The snout is much narrower than the back of the skull.
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| 22. | Its length is up to 145 mm, snout to vent.
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| 23. | The head has a light arrow mark directed towards the snout.
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| 24. | The snout of the Mexican hornshark is very round and blunt.
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| 25. | Fins and tails are yellow and the snout contains blue stripes.
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| 26. | The Caribbean roughshark has a short, blunt snout and head.
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| 27. | An additional diagnostic feature is its rounded, plainly coloured snout.
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| 28. | The snout is rounded and prominent, with lateral olfactory holes.
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| 29. | It consists of front teeth and a snout that not compressed.
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| 30. | The snout is long and thin, with numerous tooth sockets.
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