Table 1.
Features of Metaphase Karyotypes from Ingroup and Outgroup Species
| Group | Species | 2n | M | A | D | FN | X | Y |
|---|---|---|---|---|---|---|---|---|
| robusta | D. sordidula | 10 | 2 | 2 | 1 | 14 | Longer than autosomes, metacentric | Longer than the X, submetacentric, |
| D. robusta | 8 | 3 | - | 1 | 14 | Longer than autosomes, metacentric | Longer than the X, submetacentric, | |
| melanica | D. colorata | 12 | 2 | 4 | 0 | 16 | Similar size that autosomes, acrocentric. | Similar size that autosomes, acrocentric |
| D. micromelanica | 12 | 1 | 4 | 1 | 14 | Similar size that autosomes, acrocentric. | Similar size that autosomes, acrocentric. | |
|
D. melanica, D. nigromelanica, D. euronotus and D. paramelanica |
10 | 2 | 2 | 1 | 14 | Longer than autosomes, metacentric | Longer than autosomes,, submetacentric | |
| funebris |
D. funebris, D. macrospina |
12 | - | 5 | 1 | 12 | Longer than autosomes, acrocentric | Longer than autosomes, acrocentric |
| mesophragmatica |
D. pavani, D. gaucha |
10 | 1 | 3 | 1 | 12 | Similar size that autosomes, acrocentric | Similar size that autosomes, acrocentric |
| virilis | D. virilis | 12 | - | 5 | 1 | 12 | Similar size that autosomes, acrocentric | Similar size that autosomes, acrocentric |
| D. borealis | 10 | 1 | 4 | 0 | 12 |
Note: Each karyotype described by diploid number (2n), pairs of metacentric (M), acrocentric (A) and dot (D) chromosomes, and fundamental number (FN). Features of the sex chromosomes (X and Y) are summarized in terms of size and morphology.