Microworld

world of amoeboid organisms

Menu

Pterocystis latimarginalis

From Siemensma, 1991

Pterocystis latimarginalis  (Dürrschmidt, 1987) Siemensma, 1991
  
Diagnosis: Periplast 25 µm in diameter, with two types of scales; details of protoplast unknown. Spine scales spoon-shaped, consisting of shaft, lateral wings and basal wing. Shaft, 3-4 µm long and 0.1 µm thick, cylindrical, non-tapering, apically crenulated or abruptly cut off. Proximally, the shaft carries 2 smooth lateral wings in an almost V-form arrangement relative to the main axes and a basal wing, which spreads between the ventral edges of the lateral wings. The proximal shaft end is slightly curved outwards. Plate scales are elliptical or ovoid, 2-2.5 x 1.3-1.6 µm, bordered by a broad radially striated rim, which reaches its max. thickness near the inner edge of this rim. The distinctly denser appearance in TEM shows that this structure is hollow. The central area is smooth, except for a dark central line (axial thickening?).

Distribution: Sri Lanka, Malaysia.

Recent posts

Actinosphaeridium spec.

Actinosphaeridium spec. Actinosphaeridium spec. Diagnosis: Cell surrounded by a kind of membranous shell. Filopodia with granules, sometimes branching. Cell not stalked, at least not observed.

Read More »

Euglyphidion

Euglyphidion enigmaticum – after Bonnet, 1960 Genus Euglyphidion Bonnet, 196 Diagnosis: Shell hyaline, ovoid, pseudostome circular or slightly elliptical. Shell loosely covered with two types of

Read More »

Leptomyxa spec.

Leptomyxa sp., slowly retracting in response to the light of the microscope Leptomyxa sp. Diagnose: This is a very large amoeba which I found in

Read More »

Zivkovicia spec.

Zivkovicia spec., 200 µm long; the right image is viewed through the aperture Zivkovicia spec.  Diagnosis: Shell pyriform, circular in oral view, with a clear

Read More »

Pontigulasia pentangulostoma

P. pentangulostoma, after Quin et al., 2008 Pontigulasia pentangulostoma Quin, Y., Xei, S., Gu, Y. and Zhou, X., 2008 Diagnosis: Shell is brown, laterally uncompressed,

Read More »

Flabellula citata

Flabellula citata, from Dykova et al., 2008 Flabellula citata Schaeffer, 1926 Diagnosis: Length in locomotion 15-75 µm; width 25-55 µm. Shape very variable, from a

Read More »