world of amoeboid organisms

Menu
Cavalier-Smith and Von der Heyden, 2007

Pterocystis quadrata Cavalier-Smith and Von der Heyden, 2007

Diagnosis: cells 10-20 µm. Radial scales (3-5 µm) with broad axial rib tapering near the tip and base, distally strongly curved to one side, and offset from the centre to that same side making the scale much less bilaterally symmetrical than in other species and extending apically well beyond the lateral wings; wings unribbed, basally square in appearance with upturned flanges on the three almost straight sides, the fourth distal side bearing a pronounced lateral lobe on each side.
Plate scales (2-4 µm) fat ovals with a hint of radial furrowing and a central axial ridge.
Type locality: River Thames sediment, Oxford, UK.

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 »