High resolution image of the decorated ER tubules and 'rails' on the surface of the ER next to the myonemal sheet. Dense rods accompany the surface ridges adjacent to the myonemes. Pellicular pores ar...

A high resolution image of the micronucleus and macronucleus of Opercularia coarctata. The nuclear envelope has numerous pores, at least as many per unit length as in the macronucleus. Some areas of t...

An image of the contractile vacuole in diastole (filling phase). Decorated spongiome surrounds the CV. The macronucleus, micronucleus, cytopharynx, and basal bodies of perioral membranelle are include...

High resolution overview of Opercularia coarctata with macronucleus, cytoplasm, and section of the oral area. Specialized rough endoplasmic reticulum with modification into decorated tubules that lie ...

High resolution transmission electron micrograph of a portion of the macronucleus of Opercularia coarctata containing irregularly shaped heterochromatin bodies and elliptical nucleoli. Ribosome-like p...

A high resolution image of nuclear pores in face view included in an overview of the cytoplasm of Opercularia coarctata. TEM taken on 6/13/69 by R. Allen with Philips 300 operating at 60kV. Neg. 14,80...

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 surrounded by an oute...

An image of the micronucleus and macronucleus of Opercularia coarctata. The nuclear envelope has numerous pores, at least as many per unit length as in the macronucleus. Some areas of the outer membra...

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. Bar = 2µm. A print of the negative wa...

An image of the decorated ER tubules and 'rails' on the surface of the ER next to the myonemal sheet of Opercularia coarctata. Dense rods accompany the surface ridges adjacent to the myonemes. Pellicu...