world of amoeboid organisms

Menu
Acanthocystis spinifera

 

From Siemensma, 1991

Acanthocystis spinifera Greeff, 1869 emend. Siemensma & Roijackers, 1988

Diagnosis: Cell diameter 27-30 µm; spine-scales 4.6-5.3 µm long, not abundantly present and rather fine, with a cylindrical shaft, which is irregularly bent and set on a circular basal plate, centrally or, mostly, slightly eccentrically; shaft tapers slightly to the apex; apex about 0.07 µm broad with two or three blunt teeth. Basal plate 0.7 µm in diameter. Plate-scales with distinctly concave sides, thin, flat and slightly ovoid, 3.4-4.4 X 1.7-2.6 µm, with a small marginal rim; surface smooth.

Remarks: The only species which resembles A. spinifera is A. clavata. A. clavata, however, has a centrally seated shaft and a closed blunt apex. lts spine- and plate-scales are nearly half the size of those of A. clavata, while the basal plate of A. spinifera is nearly twice the diameter of the basal plate of A. clavata.

Recent posts

Sphenoderia compressa

Sphenoderia compressa, after Badewitz, 2002 Sphenoderia compressa Badewitz, 2002 Diagnosis: Test ovoid, oval in cross section, hyaline, covered with relatively small, oval, rather irregularly arranged

Read More »

Tracheleuglypha elongata

T. elongata, A-C after Thomas and Gauthier-Lièvre, 1959; D after Van Oye, 1959 Tracheleuglypha elongata Van Oye, 1959 Diagnosis: Test similar to T. dentata, but

Read More »

Tracheleuglypha acolla

T. acolla, after Bonnet and Thomas, 1960 Tracheleuglypha acolla Bonnet and Thomas, 1955 Diagnosis: Test ovoid, non compressed, round in cross-section, with large oval overlapping

Read More »

Cyclopyxis kahli oblonga

C. kahli f. oblonga , after Tarnogradskii, 1959 Cyclopyxis kahli f. oblonga  (Tarnogradskii, 1959) Centropyxis kahli f. oblonga Tarnogradskii, 1959 Diagnosis:  Test with all the

Read More »

Cyclopyxis leclercqi

Cyclopyxis leclercqi – from Beyens and Chardez, 1986 Cyclopyxis leclercqi Beyens and Chardez, 1986 Diagnosis: Shell circular in apertural view, dorso-ventrally compressed with a swollen

Read More »

Haplomyxa saranae

Haplomyxa saranae Dellinger, 2014 Diagnosis: cell body from small rounded (0.1 mm) to large elongated shape (up to 3.5 x 0.3 mm), usually flat but

Read More »