| 31. | At least two additional undescribed species await description pending availability of more material.
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| 32. | Undescribed species have been found in Malaysia and Sabah.
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| 33. | An undescribed species of " Phreatobius " lives in leaf litter.
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| 34. | Many species remain undescribed or have been recently described.
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| 35. | Not all these species have been definitely identified and some are formally undescribed.
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| 36. | The family contains many undescribed species which are being revealed by DNA analyses.
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| 37. | At least three undescribed species have been found by divers in the resergence.
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| 38. | An undescribed species is known to occur in Thailand.
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| 39. | There are 10 recognised species in the Neotropics, including 1 undescribed species.
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| 40. | This behaviour has been observed in only one other ( undescribed ) species.
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