Lemur of mouse lemurs, the gray mouse lemur ("M. murinus"), golden-brown mouse lemur ("M. ravelobensis"), and Goodman's mouse lemur ("M. lehilahytsara") were considered the same species until recently, when genetic tests identified them as cryptic species. The lemur dentition is heterodont (having multiple tooth morphologies) and derives from an ancestral primate permanent dentition of . Indriids, sportive lemurs, the aye-aye, and the extinct sloth lemurs, monkey lemurs, and koala lemurs have reduced dentitions, having lost incisors, canines, or premolars. The ancestral deciduous dentition is , but young indriids, aye-ayes, koala lemurs, sloth lemurs, and probably monkey lemurs have fewer deciduous teeth.
Should've Known Better (Richard Marx song) Should've Known Better (Richard Marx song) "Should've Known Better" is a hit song written, composed, and performed by American rock singer Richard Marx, who released in September 1987 as the second single from his self-titled debut album. The song peaked at number three on the US "Billboard" Hot 100 as well as #7 on the "Billboard" Mainstream Rock Tracks chart in 1987 and #4 on the Radio & Records CHR/Pop Airplay chart. Marx became the first solo artist in recording history to reach the top three of the Billboard Hot 100 with four singles from a debut album. In the