Nice view of the oral apparatus, macronuclear organization, cortex, and cytoplasm of Opercularia. Neg of unknown magnification. Estimate sizes from the approximate 0.2µm diameter of a ciliary axoneme...

This figure shows the connection between the peristome and the food vacuole forming zone where the alveoli end. The cytostome is the opening that connects these two zones. TEM taken on 6/13/69 by R. ...

Non-contractile stalk showing the striated nature of the fibrous “straws.” TEM taken on 6/12/69 by R. Allen with Philips 300 operating at 60kV. Neg. 3,570X. The raw negative was scanned with an Ep...

The peristome is covered on one side by the oral cilia and on the opposite by the ribbed wall. Lamellae from the ribbed wall extend into the nascent food vacuole forming region, the cytopharynx. This ...

High resolution image of the extracellular, non-contractile stalk of Opercularia coarctata that is formed from the scopula. Cylinders ('straws') of fibrous material in the lumen of the stalk are surro...

A high resolution view of the contractile, sub-cortical myonemal sheet of Opercularia coarctata. Decorated ER tubules are intimately associated with the myonemal sheet. And pellicular pores or clathri...

In Opercularia coarctata specialized ER modified into decorated tubules lie on the surface of myonemes. The composition and function of the decorations have not been determined but they may be calcium...

A view of the contractile, sub-cortical myonemal sheet of Opercularia coarctata. It is decorated with ER tubules that are intimately associated with the myonemal sheet. And pellicular pores or clathri...

The figure shows the beginning of the cytopharyngeal ribs of the ribbed wall. The peristome is bordered on one side by the paroral kinety that has 2 rows of basal bodies, of which only one is ciliated...

Opercularia coarctata. Transmission electron micrograph of contracted cell body. This ciliate does not have rows of basal body/cilia over its whole surface but has cilia in the oral region and in a tr...