Acanthocystis crescenta Zlatogursky, 2010

Diagnosis: Cell body ca.7 µm in diameter; including scales -about 12 µm. Axopodia ca. 33 µm long.Plate scales are oviform. Length of plates cales is 1.8-1.9 µm, width 1.0-1.1 µm. Distal ends of radial scales look like a crescent with a short tooth in a middle. Length of radial scales is 2.8-4.3 µm, thickness 0.1-0.2 µm. Cells actively move on the bottom of the culture dish or float in the culture medium.

Differential diagnosis: Acanthocystis crescenta has crescent-shaped tips of radial scales. There is a tooth in the middle of each crescent-like structure. The only species possessing a similar type of scales is A. astrakhanensis, but its radial scales are much more solid, without central tooth.

Type location: Symniakhovskoelake,Valamoisland, North-Western Russia.

Recent posts

Cryptodifflugia collum

Cryptodifflugia collum, after Chardez, 1971 Cryptodifflugia collum  (Chardez, 1971) Bobrov et Mazei, 2017 Difflugiella collum Chardez, 1971 Diagnosis: Shell globose, transparent, hyaline, chitinous, aperture topped

Read More »

Cryptodifflugia brevicolla

Cryptodifflugia brevicolla, after Golemansky, 1979 Cryptodifflugia brevicolla  Golemansky, 1979 Diagnosis: Shell ovate, laterally compressed, with clearly expressed chitinous collar around an aperture, neck circular in

Read More »

Cryptodifflugia bassini

Cryptodifflugia bassini, after Bobrov, 2001 Cryptodifflugia bassini  Bobrov, 2001 Diagnosis: Shell small, axially symmetrical, circular in transverse section, flattened in longitudinal section, widely elliptical. Aperture

Read More »

Cryptodifflugia apiculata

Cryptodifflugia apiculata, after Cash, 1904 Cryptodifflugia apiculata  (Cash, 1904) Page, 1966 Difflugiella apiculata  Cash, 1904 Diagnosis: Shell ovoid, not compressed laterally, chitinous, smooth, transparent, colorless,

Read More »

Cryptodifflugia angusta

Cryptodifflugia angusta, after Schönborn, 1965 Cryptodifflugia angusta  (Schönborn, 1965) Page, 1966 Difflugiella angusta  Schönborn, 1965 Diagnosis: Shell small, organic, elongated-ovate, not transparent, yellow-brown, covered with

Read More »

Cryptodifflugia angulata

Cryptodifflugia angulata, after Playfair Cryptodifflugia angulata Playfair, 1917 Diagnosis: Shell small, oval, transparent, lateral sides flattened, fundus rounded-conic, widest shell part in the middle, lateral

Read More »