The Drosophila melanogaster species subgroup contains 9 species, including the best known species Drosophila melanogaster and D. simulans. The subgroup belongs to the Drosophila melanogaster species group within the subgenus Sophophora.
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The species of the simulans complex form a hard polytomy. Most likely, the island species D. (S.) mauritiana (Mauritius) and D. (S.) sechellia (Seychelles) branched of from the mainland species D. (S.) simulans in such a narrow time frame that it is impossible to distinguish which species brached off first and which second.
Molecular Evolution in the Drosophila Melanogaster Species Subgroup: Frequent Parameter Fluctuations on the Timescale of Molecular Divergence
Mar 01, 2006; ABSTRACT Although mutation, genetic drift, and natural selection are well established as determinants of genome evolution, the...