image_list image_listE

Litostomatea: Haptoria: Pharyngophorida: Tracheliidae

 Dileptus cygnus
(Claparède & Lachmann, 1859)

Dileptus cygnus Genus: Body long, rear usually pointed (Illustrated Guide, 1985). Elogate; snout or neck-like prolongation (proboscis) conspicuous; contractile vacuoles two or more (Kudo, 1966). Contractile vacuoles usually lie in a row along the dorsal surface (Carey, 1992).
Species:
Similar Genus ->> Trachelius; Paradileptus;

Dileptus cygnus, cell body 600 μm long, μm wide, macronucleus moniliform, contractile vacuoles line the dorsal surface and extend right to the tip of the neck region, tail region present, very long proboscis (1/2 of the body length), x 100, x 200, x 400, Japan, 1998 by Y. Tsukii
scale 200 μm scale 400 μm scale 600 μm; x 100
Dileptus cygnus Dileptus cygnus
scale 100 μm scale 200 μm scale 300 μm; x 200
Dileptus cygnus Dileptus cygnus Dileptus cygnus Dileptus cygnus
Macronucleus moniliform
scale 50 μm scale 100 μm scale 150 μm; x 400
Dileptus cygnus Dileptus cygnus Dileptus cygnus
Dileptus cygnus Dileptus cygnus






D. gigas: About 700 μm long; macronucleus sausage-shaped; contractile vacuoles line the dorsal surface and extend right to the tip of the neck region (Illustrated Guide, 1985).
D. monilatus (Stokes, 1886) Kahl, 1931: Elongate; 700 μm long; no separate tail region; macronucleus moniliform; contractile vacuoles line the dorsal surface and extend right to the tip of the neck region (Carey, 1992). Proboscis less than 1/4 of the body length.

Please click on images for viewing enlarged.
Copyright Protist Information Server