 The tail , according to Schwartz , is longer than in the potto . He does not provide measurements of the tail of AMZ 6698 and notes that at least one vertebra is missing , but Sarmiento counted 11 caudal vertebrae in an illustration of AMZ 6698 and Groves counted at least 15 . However , Sarmiento found that the number of caudal vertebrae ranges from 5 to 17 , with an average of 11 , in pottos . Relatively long tails are also common in the western form of the potto , , though according to Stump the tail of Pseudopotto is longer than any seen in pottos . The false potto allegedly has shorter spines on its cervical ( neck ) and first and second thoracic ( chest ) vertebrae , but Leon notes that this feature is also seen in western pottos . Schwartz writes that the false potto differs from pottos and angwantibos in lacking a bifid ( two @-@ tipped ) spine on the second cervical vertebra , but Sarmiento found this feature in 3 out of 11 potto specimens he examined . 
