Rigidohymena inquieta (Stokes 1887) (Stokes, 1887) Berger 2011
- Dataset
- Phylogenetic positions of four hypotrichous ciliates (Protista, Ciliophora) based on SSU rRNA gene, with notes on their morphological characters
- Rank
- SPECIES
Classification
- kingdom
- Protozoa
- phylum
- Ciliophora
- class
- Hypotrichea
- order
- Oxytrichida
- family
- Oxytrichidae
- genus
- Rigidohymena
- species
- Rigidohymena inquieta
discussion
Remarks: Chinese population corresponds well with previous studies in terms of living morphology, especially the body size and rigid pellicle without cortical granules. However, the infraciliature shows some conflicts between populations. Both original reports of Stokes (1886) and Grolière (1975) draw four ventral cirri, which Berger (1999) considered as a typical character of this species. While the organism reported by Gu and Zhang (1992), a highly possible synonym of C. inquieta considered also by Berger (1999), as well as present population, has constantly five ventral cirri. Thus, we inclined to accept the variation in number of ventral cirri as population dependent. Depending on our observations and the work of Gu and Zhang (1992), there should be six dorsal kineties and three caudal cirri following typical Oxytricha- pattern during ontogenesis. Çapar (2007) also reported a population of C. inquieta from Anatolia with only three ventral cirri, but the infraciliature is possibly unreliable for the reason that the typical Cyrtohymena - like paroral membrane was not shown in his drawing.