| 21. | It is the surviving member of monotypic family Rhynochetidae, order Gruiformes.
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| 22. | The Thamnophilidae contains several large or very large monotypic ones.
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| 23. | It contains three monotypic genera, with five species in the family.
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| 24. | The species is monotypic, and there is no significant geographical variation.
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| 25. | They are considered monotypic, consisting of closely related haplotypes.
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| 26. | It is placed in the monotypic genus " Salvadorina ".
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| 27. | The forests are primarily monotypic stands throughout the forest at elevations above.
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| 28. | The snake belongs to the monotypic genus " Elachistodon ".
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| 29. | He placed it in the monotypic subgenus " Anourosperma ".
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| 30. | About 64 families are monotypic, containing only one species.
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