Family: Body long-ovoid or flask-shaped; oral region a small simple dome (Illustrated Guide, 1985).
Genus: Body not flattened; no obvious dome; body kineties slightly spiralled; often contractile (Illustrated Guide, 1985). elongate or vermiform, circular in cross-section; highly contractile; cone-like proboscis absent; always elongate; a large contractile vacuole at posterior end (Carey, 1992).
->> Description at WPRNO Google Image Search
Chaenea sp.1
89 x 11 μm
Saitama, 1999
Chaenea sp.1
69 x 9 μm
Japan, 199?
Chaenea sp.3
69 x 12 μm
Japan, 1998
Chaenea sp.2 ?
52 x 11 μm
Tochigi, 2001
Chaenea sp.2 ?
39 x 9 μm
Japan, 199?
Chaenea ?
or Rhopalophrya ?
82 x 17 μm
Midori-no-oka p.
Matsubushi
Saitama, 2004
Similar Genus ->> Trachelophyllum; Ileonema
