world of amoeboid organisms

Menu
From Zlatogursky et al., 2016

 

Acanthocystis amura Zlatogursky, Gerasimova et Plotnikov, 2016

Diagnosis: Cell diameter 9.1 to 14.2 µm. Spine scales of two types. Type 1 spine scales 1.3–4.8 µm with four small hooks on the tip. Type 2 spine scales 1.0–3.6 µm with four, sometimes three or five teeth on the tip. Plate scales oval, 1.2–2.6 x 1.0–1.8 µm, with axial thickening and thickened border.

Ecology: Freshwater. Type locality. The Amur River, the Far East of Russia, the sandy bank. N 50°15’5” 35 E 127°32’51”. Collected in August of 2012.

Remarks: The morphology of Acanthocystis amura resembles that of Acanthocystis quadrifurca. They both have similar spine scales but their plate scales are completely different. A. valdiviense differs from the new species in absence of hook-bearing scales. Molecular phylogeny based on 18S rDNA consistently placed A. amura into A. nichollsi/A. costata clade, but relationships between those three species were not resolved. Morphology of another centrohelid strain from another location (the South Urals) has been compared with that of the original strain and few minor differences in size characteristics of the scales have been revealed.

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 »