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Xenopus longipes, the only known species in the subgroup longipes, was first described by Loumont and Kobel in 1991. It is a polyploid species, one of only two known dodecaploid vertebrate species, 12n; the other known dodecaploid species is Xenopus ruwenzoriensis) with a chromosome number of 108 (Tinsley and Kobel 1996). It is relatively small compared to other Xenopus, with males being about 28-31 mm and females being about 32-36 mm in length. X. longipes are covered with tiny black spots both dorsally and ventrally. In addition to these small black spots, some specimens have larger, irregularly distributed spots dorsally. The dorsal side of the frog tends to be brown or caramel while the ventral side tends to be a bright orange (Loumont and Kobel 1991). X. longipes has large eyes with the lower eyelid covering about 1/3 of the eye length (Tinsley and Kobel 1996). Unlike many of the Xenopus species that have large webbed feet, X. longipes have small webbed feet with thin limbs and very long toes. X. longipes also differs in bone structure from other Xenopus in its laterally displaced parasagittal crests and unique nasal structure (Loumont and Kobel 1991).