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

Cyclopyxis arenata

Cyclopyxis arenata – after Boltovskoy and Lena, 1966 Cyclopyxis arenata (Cushman, 1930) Boltovskoy, 1956 Basionym: Pseudarcella arenata Cushman, 1930 Diagnosis: Hemispherical shell. Convex dorsal side,

Read More »

Cyclopyxis overview 2

C. impressa C. impressa C. stellata C. stellata C. crucistoma C. crucistoma C. crucigenia C. crucigenia C. grospietschi C. grospietschi C. triquestrus C. triquestrus C.

Read More »

Cyclopyxis profundistoma

Cyclopyxis profundistoma – from Kufferath, 1932 Cyclopyxis profundistoma Kufferath, 1932 Diagnosis: The yellowish grey colored test is made of coarser mineral particles, which are connected

Read More »

Cyclopyxis maynei

Cyclopyxis maynei – from Kufferath, 1932 Cyclopyxis maynei Kufferath, 1932 Diagnosis: Test cylindrical, characterized by the size of the aperture, which is 87-97 μm wide

Read More »

Cyclopyxis kahli obliqua

C. kahli var. obliqua , after Decloitre, 1978 Cyclopyxis kahli var. obliqua   Decloitre, 1978 Diagnosis:  Test with all the characteristics of the type species

Read More »