Centriole |
absent |
0 |
|
Basic organization of the spindle pole |
spindle pole body a plaque or disc |
3 |
|
Spindle pole body form, interphase-prophase |
a 3-layered disc |
3 |
|
Spindle pole body form, metaphase-anaphase |
a 4-layered disc directly connected to spindle |
3 |
|
Metaphase nuclear envelope |
intact with small polar fenestrae plugged by the spindle pole bodies |
1 |
|
Telophase nuclear envelope |
retention of complete nuclear envelope around the chromatin with median constriction/fragmentation |
0 |
|
Perinuclear endoplasmic reticulum |
absent |
0 |
|
Spindle pole body cap |
absent |
0 |
|
Transient intranuclear element at late interphase-prophase |
present within nucleus opposite the extranuclear spindle pole body |
1 |
|