| 11. | It is monotypic within the genus " Atlantoxerus ".
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| 12. | It is monotypic within the genus " Choeronycteris ".
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| 13. | It is a monotypic genus endemic to the Colombian Amazon Basin.
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| 14. | In former times, the genus was usually treated as monotypic.
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| 15. | Two of the subfamilies usually placed in the Termopsidae are monotypic.
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| 16. | As presently defined, the rufous-faced antbird is monotypic.
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| 17. | As presently defined, the brownish-headed antbird is monotypic.
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| 18. | Such families are monotypic families and this family has no subfamilies.
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| 19. | This monotypic species is found in highland forests in Peninsular Malaysia.
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| 20. | On the basis of the morphology of the molars'monotypic.
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