| 1 | 
 
 | 
Arcella gibbosa, 
 --- by Tsukii, Yuuji at Lab of Biol, Hosei Univ.  | 
| 2 | 
 
 | 
Arcella gibbosa, 
 --- by Tsukii, Yuuji at Lab of Biol, Hosei Univ.  | 
| 3 | 
 
 | 
Arcella gibbosa, 
 --- by H. Yoshino at University of Ryukyu  | 
| 4 | 
 
 | 
Arcella gibbosa, 
 --- by Tsukii, Yuuji at Lab of Biol, Hosei Univ.  |