| 31. | Due to the limited amount of material, it has been considered a " nomen dubium ".
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| 32. | This animal is only known from these teeth, and is usually considered a " nomen dubium ".
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| 33. | However, it was later dismissed as a " nomen dubium " based on non-diagnostic remains.
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| 34. | Later researchers considered " Altispinax " a " nomen dubium " because the single tooth was undiagnostic.
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| 35. | Because the known remains are so poor, the genus is now regarded as a " nomen dubium ".
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| 36. | Because the fragmentary remains provide little diagnostic value, the genus is now considered a " nomen dubium ".
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| 37. | Gervais 1872 was previously considered a synonym, but it has been recently considered a " nomen dubium ".
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| 38. | Subsequent authors have agreed with this assessment and have considered " Antrodemus " a " nomen dubium ".
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| 39. | A revision in 2010 by Philip Mannion concluded that " Bothriospondylus " is a " nomen dubium ".
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| 40. | The authors considered " Arstanosaurus akkurganensis " a " nomen dubium " and did not refer its material.
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