| 21. | Males also have more concave plastrons, believed to be another adaptation for mating.
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| 22. | The turtle's shell is divided into two sections : carapace and plastron.
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| 23. | The plastron is orange-red, and may also have large dark blotches.
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| 24. | The plastral scutes join along a central seam down the middle of the plastron.
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| 25. | The osteoderms of the carapace and plastron are smaller than those of other species.
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| 26. | They have an inflexible trunk encased in a horny carapace above and a plastron below.
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| 27. | A tracheal tube may contain ridge-like circumferential rings of taenidia in various plastron.
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| 28. | In many species, dimorphisms include elongated foreclaws or a concave plastron in the male.
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| 29. | The plastron also has bold colour pattern.
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| 30. | The plastron ( underside ) is yellowish.
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