Basic cell shape is ovoid.

Things to be seen:

Polykineties/ Adoral zone of membranes


Alveolar Boundaries

Buccal cavity


Bases of cirri -- tufts of cilia that are joined together and function as a single organelle. There are different types present in different quantities:


Frontal bases of cirri 9

Transverse bases of cirri 5

Caudal bases of cirri 4


Polykineti / Adoral zone of membranes:

Start out at the top of the cell and come down to about the center of the cell in a C shaped pattern.

Outline the left side of the buccal cavity. Blue arrows in diagram below.

Note: become shorter in size towards the center of the cell


Located at the base of the buccal cavity where the polykineti are seen ending off.

Circular in shape and is about the size of a nickel.

Buccal cavity:

Funnel shaped, pink arrow on diagram below.

Outlined by the Adoral Zone of membranes on the left side.

Ends in the cytostome.


Most difficult structures to find on this organism. Try focusing up and down with the specimen.

Located near where the polykinety end on the left side of the buccal cavity.


Blue Arrows = Polykineties

Pink Arrow = Buccal Overture

Green Arrows = Alveolar Boundaries

Alveolar Boundaries:

These maybe easily missed because seen as fine lines in the background. When focused properly the most common pattern resembles multiple rows of square shaped pillows all throughout the cell. Green arrows on diagram above.

Frontal Bases of Cirri:

Located near the anterior end of the cell on the cell’s right hand side.

Circular in shape.

Should be nine of them present, probably present in small clusters of three or four.



Transverse Bases of Cirri:

Five of these located centrally towards the posterior end of the cell just below the buccal cavity.

Diamond shaped.

Caudal Bases of Cirri:

Four of these spread across the base of the cell.