Cytokinesis doesn't have "substages" in the same way that mitosis or meiosis do. It's a continuous process that follows nuclear division (mitosis or meiosis) and results in the physical separation of the daughter cells.

However, there are two main phases within cytokinesis, which can be considered as stages:

1. Cleavage Furrow Formation:

* This occurs in animal cells and is characterized by the appearance of a contractile ring made of actin filaments and myosin.

* The ring contracts, pulling the plasma membrane inward, forming a groove called the cleavage furrow.

* This furrow deepens until it pinches off completely, separating the cytoplasm and forming two daughter cells.

2. Cell Plate Formation:

* This occurs in plant cells and involves the formation of a cell plate between the daughter nuclei.

* The cell plate originates from vesicles derived from the Golgi apparatus, containing cell wall material.

* These vesicles fuse together at the center of the cell, growing outward and eventually connecting with the existing cell walls, separating the two new cells.

In summary: Cytokinesis is not divided into distinct substages like mitosis or meiosis. Instead, it involves a continuous process with two main phases, cleavage furrow formation (in animal cells) and cell plate formation (in plant cells).