Didinium captures Paramecium. Paramecium is almost completely ingested and the proboscis is beginning to reform. This micrograph was taken in 1968 by G. Antipa on a Cambridge Mark IIA operating at 20k...

Didinium captures Paramecium. At midingestion and showing metachronous waves of cilia within the two characteristic ciliary girdles of Didinium nasutum. This micrograph was taken in 1968 by G. Antipa ...

The postoral fibers are also heavily labeled by anti-b-tubulin. The cell was lightly fixed, placed in metylcellulose and frozen in liquid nitrogen. Sections were produced at -100°C before thawing and...

Didinium captures Paramecium. After reeling in the prey with cyclosis tugging at the attached toxicysts the proboscis opens to engage the Paramecium. This micrograph was taken in 1968 by G. Antipa on ...

The cytopharyngeal ribbons of microtubules tend to curve into a “C” shape away from the cytopharynx but they still remain connected as a ribbon and are heavily labeled by immunogold when exposed t...

This section represents one in a series of serial sections. At this point the two parts of the macronucleus are now connected by a DNA replication band similar to the hypotrichs (e.g. Euplotes). The l...

This group represents a serial series of sections. At the level of this section, numerous food vacuoles, only three cross sectioned cilia remain of the perioral ciliature. TEM taken on 3/12/71 by R. A...

A view of the cytopharynx and its nascent food vacuole forming region. The flattened pharyngeal vesicles that may contain monolayers or bilayers of lipids seem to be equivalent to the discoidal vesicl...

The top of the cytopharyngeal basket showing a closed cytostome where food will be engulfed. In the lab Nassula was fed Phormidium inundatum, a cyanobacterium. Ingested food is seen in food vacuoles a...

Didinium ingests Paramecium. Also showing a few discharged trichocysts and metachronous waves of cilia in the two characteristic ciliary girdles of Didinium nasutum. This micrograph was taken in 1968 ...