Complex sentence: Social systems of "M. berthae" are more similar to the "Microcebus murinis" than the "Cheirogaleus medius", i.e. Madame Berthe's mouse lemur is sexually promiscuous rather than monogamous.
Split into simpler sentences: Social systems of "M. berthae" are more similar to the "Microcebus murinis" than the "Cheirogaleus medius". In other words, Madame Berthe's mouse lemur is sexually promiscuous rather than monogamous.