world of amoeboid organisms


Choanocystis roijackersi  Wujek et Saha, 2006

Diagnosis:  Cells 15-30 µm; periplast comprising two types of scales: plates and spines; plate scales elliptical, broadly ovate, or with a median constriction, c. 1.25-2.5 X 2-3.5 µm, without any ornamentation or clearly defined central ridge; spine scales cylindrical, 1.5-3 µm long, bipartite, consisting of a shaft and base plate; base plate asymmetrical, shaft straight, c. 0.2 µm thick, hollow. apex with 2-4 teeth; shaft slightly constricted at base at junction of base plate; protoplast unknown.

Ecology: Freshwater, India (Kharagpur Reservoir)

Recent posts

Cyclopyxis magna

Cyclopyxis magna – from Stepanek, 1967 Cyclopyxis magna Stepanek, 1967 Diagnosis: Test relatively high, covered with large mineral grains. The edge of the pseudostome is

Read More »

Cyclopyxis marinus

Cyclopyxis marinus – from Decloitre, 1977 Cyclopyxis marinus Decloitre, 1977 Diagnosis: Compared to Cyclopyxis aplanata the pseudostome is very minimally invaginated. It is surrounded by

Read More »

Cyclopyxis triangularistoma

Cyclopyxis triangularistoma – from Decloitre, 1980 Cyclopyxis triangularistoma Decloitre, 1980 Diagnosis: Ventral side exclusively covered with very small mineral grains, giving it a pearled appearance.

Read More »

Cyclopyxis pirini

Cyclopyxis pirini – from Golemansky 1974 Cyclopyxis pirini Golemansky 1974 Diagnosis: Ventrally, the test is circular. Laterally, the test is low hemispherical with a more

Read More »

Cyclopyxis eurystoma alta

C. eurystoma f. alta, after Jung, 1942 Cyclopyxis eurystoma f. alta  Jung, 1942 Diagnosis:  Test and coverage as the type. However, the side profile is

Read More »