| 31. | Both the dorsal and ventral surfaces are smooth and have no dermal denticles.
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| 32. | The dermal denticles are oval with five horizontal ridges leading to marginal teeth.
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| 33. | The premaxillary teeth lack denticles; those on the maxillary teeth are small.
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| 34. | The skin is delicate and entirely lacking dermal denticles.
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| 35. | The teeth also possess marginal denticles on the crown.
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| 36. | The skin is very thick and covered by well-calcified dermal denticles.
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| 37. | The body and fins are densely covered by tiny, overlapping dermal denticles.
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| 38. | A crest of enlarged denticles is present along the dorsal caudal fin margin.
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| 39. | Neosauropods lack denticles on the majority of their teeth.
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| 40. | The number of enlarged midline denticles increases with age.
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