Microworld

world of amoeboid organisms

Menu
From Siemensma, 1991

Pterocystis pulchra (Dürrschmidt,1987 ) Siemensma, 1991

Diagnosis: Periplast, 20-30 µm. in diameter covered with 2 types of scales. Plate scales, 3.0-3.3 x 1.7-2.0 µm, are ovoid to ellipsoidal or sometimes asymmetrical. They are thin with deeply concave middle parts, elevated submarginal parts and slightly inflexed margins. They are patternless, the central ridge indicated only as a slightly darker line. The spine scales are rather numerous, 3.0-4.0 µm long, max. 3.1-3.8 µm broad, of almost funnel- or calyx-like appearance. The shaft is reduced to a dark narrow ridge, probably hollow, because of its less dense centre. The lateral wings are continued along the whole length of the shaft, reaching their maximum breadth in the middle distance of the scale. From here towards the proximal end they are closely anchylosed with the basal wing and, after considerable narrowing, form a patternless hollow stalk, which can be long and slender or short and stumpy, Distally the scales are of differing lengths; commonly the front parts are shorter and slightly curved outwards, and the rear parts straighter, reaching their max. length near the distal shaft end. The lateral wings are ornamented by thin deli­cate ribs, which run from the shaft to the outer margin transversally or obliquely. Ribs are also present on the front part of the calyx but here they run inwards from the outer margin.

Ecology: Type habitat: Swamp on the left-hand side of the southbound Pan American High­way, 42 km south of Puerto Montt, (1981)

Pterocystis pulchra, Rotes Wasser, Germany – Photomicrograph Eckhard Völker, Berlin
Pterocystis pulchra, Rotes Wasser, Germany – Photomicrograph Eckhard Völker, Berlin
Pterocystis pulchra, Rotes Wasser, Germany – Photomicrograph Eckhard Völker, Berlin
Pterocystis pulchra>, Rotes Wasser, Germany – Photomicrograph Eckhard Völker, Berlin
Recent posts

Velamentofex

Velamentofex tyrolensis Family Velamentofexidae Völcker and Clauß, 2020 Diagnosis: Multinucleate organic-walled monothalamous foraminifera. Test spherical to pyriform, usually surrounded by a broad layer of mucus-like

Read More »

Claparedellus lachmannii

Claparedellus lachmannii, common shape (Riedensee) Claparedellus lachmannii  Khanipour Roshan and Clauß, 2020 Diagnosis: Multinucleate organic-walled monothalamous foraminifera. Test spherical to elongated pyriform or irregularly shaped, with a

Read More »

Claparedellus

Claparedellus lachmannii Genus Claparedellus Khanipour Roshan and Clauß, 2020 Diagnosis: Multinucleate organic-walled monothalamous foraminifera. Test spherical to elongated pyriform or irregularly shaped, with a hyaline, flexible,

Read More »

Haplomyxa spec

Main cell body is surrounded by debris Haplomyxa sp. The cell body was hidden by debris and only once the whole cell was naked and

Read More »

Edaphoallogromiidae

Edaphoallogromia australica Family Edaphoallogromiidae Siemensma, Holzmann, Apothéloz-Perret-Gentil, Clauß, Voelcker, Bettighofer, Khanipour Roshan, Walden, Dumack and Pawlowski, 2020 Diagnosis: Multinucleate organic-walled monothalamous foraminifera with a spherical

Read More »

Lieberkuehnia spec.

Lieberkuehnia spec., body length 127 µm Lieberkuehnia spec.? I found two cells, size about 125 µm when ovoid, with an organic-walled membranous test and a

Read More »