Main Content

The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Ref ID : 4332

Ana Martin-Gonzalez, Laura Benitez, and Juan Carlos Gutierrez; Cortical and Nuclear Events during Cell Division and Resting Cyst Formation in Colpoda inflata. J.Protozool. 38(4):338-344, 1991

Reprint

In File

Notes

Nuclear and cortical phenomena during dividing and resting cyst formation of Colpoda inflata are described. Cell division forms a cyst and produces two or four tomites. In each tomite, the right oral field results from the proliferation of the anterior extreme of a single kinety, and the left oral field results from the proliferation of four, five, or six somatic kineties. After macronuclear division, each macronuclear mass undergoes a chromatinic extrusion process. During resting cyst formation, the oral infraciliature of the vegetative cell is resorbed. The somatic kineties dispose in a radial way and some pairs of kinetosomes disappear. As in cell division, there is an extrusion process. From these results we concluded that the resting cysts of Colpoda inflata cannot be included in any group of the previous classification for hypotrich resting cysts. Thus, we propose a new additional group to Walker Maugel's classification called PKR (partial-kinetosome-resorbing) cysts.