Katabia gromovi
| Katabia gromovi | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name of the genus | ||||||||||||
| Katabia | ||||||||||||
| Karpov , Ekelund & Moestrup , 2003 | ||||||||||||
| Scientific name of the species | ||||||||||||
| Katabia gromovi | ||||||||||||
| Karpov, Ekelund & Moestrup, 2003 | ||||||||||||
Katabia gromovi is a heterotrophic flagellate and the only species of the genus Katabia , it lives swimming in the ground.
features
Katabia's body is teardrop-shaped, with the belly side flattened and the back side protruding prominently. The length is 8 to 12 µm, the width at the widest point in the rear area 5 to 7 µm.
The flagella start subapically, about a quarter of the cell length from the front end. A flagellum is around 2.5 times as long as the cell, is oriented over the left side to the rear and has a long acronym . The anterior flagellum is 1.5 times as long as the cell and has a shorter acronema.
The species forms cysts 7 to 8 µm in diameter and are covered with a thick, translucent, mucus-like wall.
The ultrastructure corresponds to that of Cercomonadidae : The only cell envelope is the plasmalemma , under which there are kinetocysts . The basal body of the posterior flagella is roughly at right angles and in a different plane to the basal body of the anterior flagellum. The flagellum roots correspond to those in Heteromita . The cell nucleus is connected to the basal bodies by fibrillar roots. A microtubule cone is missing. A microbody with amorphous content is located near the core . The mitochondria have worm-shaped tubular or vesicular cristae.
Morphologically, the species is very similar to Heteromita , but has a significantly different mode of locomotion: It never moves gliding, but always swimming. It has mushroom-like bodies similar to those in Cercomonas .
Systematics
Molecular genetic studies suggest that the closest relatives of the species are the genera Heteromita , Cercomonas and Cryothecomonas .