kimerajamm
Joined: 28 Nov 2010
Posts: 785
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 Posted: Mon Apr 25, 2011 12:10 pm Post subject: Molecular data |
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Determining the phylogeny of subfossil lemurs has been problematic because studies of morphology, developmental biology, and molecular phylogenetics have sometimes yielded conflicting results. All studies agree that the family Daubentoniidae (including the giant aye-aye) diverged first from the other lemurs at least 60 million years ago. The relationship between the remaining families has been less clear. Morphological, developmental, and molecular studies have offered support for lumping the four sloth lemur genera of the family Palaeopropithecidae with the family Indriidae (including the indri, sifakas, and woolly lemurs).[17] The placement of family Megaladapidae has been more controversial, with similarities in teeth and skull features suggesting a close relationship with family Lepilemuridae (sportive lemurs).[17][8] Molecular data, instead, indicate a closer relationship to family Lemuridae.[17] Likewise, a relationship between family Archaeolemuridae and family Lemuridae has been suggested, based on morphological and developmental traits, yet molar morphology, the number of teeth in the specialized toothcomb, and molecular analysis support a closer relationship with the indriid–sloth lemur clade.[17] Other subfossil lemurs, including the giant aye-aye and Pachylemur, are more easily placed due to strong similarities with existing lemurs (the aye-aye and ruffed lemurs, respectively).[8]
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