Table 7 Comparative characterization of green frontoniids
Characters | Frontonia vernalis sensu Ehrenberg | F. vernalis (Neotype) | F. paravernalis sp. nov. | F. shii |
|---|---|---|---|---|
Average body length of living cells (μm) | 233 | 250 | 178 | 300 |
Somatic kineties, number | ND | 120–145 | 98–116 | 128–142 |
Contractile vacuoles, number | 1–2 | 1 | 1 | 1 |
Collecting canals, number | ND | 8–12 | 8–11 | ~ 10 |
PCV, number, position | ND | 1, dorsal | 1, dorsal | 1, ventro-lateral |
Postoral suture silver line | ND | Ends before the posterior end of the cell | Ends before the posterior end of the cell | Reach the posterior end of the cell |
Peniculi (I + II + III) | ND | 4 + 4 + 4 | 4 + 4 + 4 | 4 + 4 + 4 |
Vestibular kineties, number | ND | 3 | 3–4 | 3–4 |
Postoral kineties, number | ND | 6–7 | 5–7 | 7–8 |
Paroral membrane | ND | One-rowed, very close to vestibular kinety | One-rowed, very close to vestibular kinety | Double-rowed |
Dorsal zone of parallel kineties | ND | 8–10 | 6–8 | Not applicable |
Micronucleus, number | ND | 3–9 | 1–3 | Not observed |
Swimming rotation | ND | R / L | R / L | L |
Reference | Present study | Present study | [15] |