 M. dolichobrachion was discovered in 1986 and formally described in 1995 . It was found in the caves of Ankarana , northern Madagascar , around the same time that the first remains of Babakotia were unearthed . The species name dolichobrachion is Greek , coming from dolicho- ( " long " ) and brachion ( " arm " ) , and means " long @-@ armed " . It was a medium @-@ sized lemur , slightly larger than the other two members of its genus , weighing approximately 14 kg ( 31 lb ) . It differed significantly from the other two in its limb proportions and its postcranial morphology . Most notably , it was the only species in the genus to have forelimbs that were longer than the hindlimbs , due to a substantially longer and more robust humerus ( yielding an intermembral index of 113 ) , as well as more curved phalanges ( finger and toe bones ) . For these reasons , it is thought to have been more sloth @-@ like in its use of suspension . This was further supported by a study of a single lumbar vertebra . This vertebra was similar to that of Babakotia in having a moderately reduced , dorsally oriented spinous process and a transverse processes ( plates of bone that protrude from the vertebrae ) that points to the side ( laterally ) . The vertebra was intermediate in length when compared with other sloth lemurs , and its laminae ( two plates of bone that connect to the spinous process ) were not as broad as seen in Palaeopropithecus . In M. dolichobrachion , skull length averaged 102 mm ( 4 @.@ 0 in ) , ranging from 97 @.@ 8 to 105 @.@ 5 mm ( 3 @.@ 85 to 4 @.@ 15 in ) . The only notable difference from the two other species in its teeth was that the third upper molar had a relatively wider trigon and smaller talon ( groups of cusps on the molar teeth ) . It was a mixed feeder , eating leaves , fruits , and seeds . This species was more of a seed predator than the other two species , but was not as specialized as closely related Babakotia radofilai . M. dolichobrachion was rare and shared its range with two other sloth lemurs , Babakotia radofilai and Palaeopropithecus maximus . It was the most distinct member of its genus and was geographically restricted to the extreme north of the island . 
