Jeannellia
Jeannellia Tucolesco, 1962 (ref. ID; 2014)
Class Polyhymenophora: Subclass Spirotricha: Order Oligotrichida: Suborder Oligotrichina (ref. ID; 2014)
[ref. ID; 2014]
Ovoid body slightly dorso-ventrally flattened with deep longitudinal ridges. Rounded posterior and truncated anterior regions. The apical end bears a conspicuous, well-developed AZM which appears to be open. Body uniformly ciliated with a single long caudal cilium. The spherical macronucleus lies in the posterior body half and the contractile vacuole is terminal. Characteristically the animal swims rapidly backwards.
The genus seems to have been only reported on a single occasion in an underground lake in Romania.
Quote; Colin R. Curds, Michael A. Gates and David McL. Roberts "British and other freshwater ciliated protozoa Part II Ciliophora: Oligohymenophora and Polyhymenophora" Cambridge University Press, 1983 (ref. ID; 2014)
[ref. ID; 3389]
Small size (22-25 um), pyriform body, round posteriorly. The anterior extremity is truncated where apical membranelles are encircled. There are longitudinal furrows at the somatic area. Somatic ciliature and a long caudal cirrus is present. Found in freshwater in a cave. (ref. ID; 3389)
- Jeannellia spelea Tucolesco, 1962 (ref. ID; 3389)
Descriptions
The body is round posteriorly and especially its anterior half is flat dorso-ventrally. The anterior extremity is truncated. The pellicle in the somatic area is furrowed longitudinally and seems to be double layered. The peristomial area displays a widely opened buccal cavity at the ventral side. Somatic cilia and a long caudal cirrus are present. The round macronucleus and a contractile vacuole are situated posteriorly. Food vacuoles are seen at the middle area. It swims backwards rapidly, with the posterior end leading. Found in freshwater in a cave. (ref. ID; 3389)
Measurements
Size, 22-25 um. (ref. ID; 3389)