world of amoeboid organisms


Pinaciophora marina Nicholls, 2013

Diagnosis: Cells 12-22 µm in diameter covered in imbricate, generally circular or (occasionally) slightly elliptical plate-scales, 3.5-5.8 µm in diameter. Scales consisted of two layers joined at the peripheral margin with a slightly thickened rim, about 0.10-0.15 µm wide. The distal layer of the scale was perforated with generally two series of holes, an outer series of 7-13 holes and an inner group of 1-7 holes; hole size (0.22-0.42 µm in diameter) was not necessarily determined by location on the scales. Generally, the largest holes were located in the outer series and smallest holes in the inner region of the scale; holes of the large type were never found to represent the inner series occupying the central area of the scale unless only 1-2 such holes were present in that part of the scale. Some scales included an apparently rare occurrence of 1-2 tiny holes (0.1 µm) at unpredictable positions on the scales. The underside (proximal surface) of the plate-scales appears thin and semi-transparent in SEM, often revealing the holes of the upper (distal) surface.

Ecology: Marine. Type locality: Pacific Ocean beach near Gillatt (Grassy) Island, Haida Gwaii (Queen Charlotte Islands), British Colµmbia, Canada (53.241ON, 131.898OW).

Recent posts

Penardochlamys arcelloides

P. arcelloides – after Penard, 1904 Penardochlamys arcelloides  (Penard, 1904) Deflandre, 1953 Diagnosis: Colorless or very slightly yellowish envelope, bag or cauldron-shaped, very thin, chitinous,

Read More »

Reticulomyxa hannae

R. hannae, plasmodium – photomicrograph Steffen Clauss Reticulomyxa hannae Völcker and Clauß, 2020 Diagnosis: Trophozoites surrounded by a very thin mucous envelope, with slowly moving plasmodia, variable

Read More »

Velamentofex saxonensis

V. saxonensis, feeding (photomicrograph Steffen Clauss) Velamentofex saxonensis Völcker and Clauß, 2020 Diagnosis: Trophozoites ovoid, 30-95 μm, granuloreticulopodia up to 1000 μm long. with a hyaline, thin

Read More »

Velamentofex tyrolensis

V. tyrolensis (photomicrograph Steffen Clauss) Velamentofex tyrolensis Völcker and Clauß, 2020 Diagnosis: Trophozoites ovoid, 98-125 μm, with reticulopodia up to 300 μm long, with a hyaline,

Read More »

Velamentofex berolinensis

V. berolinensis Velamentofex berolinensis Völcker and Clauß, 2020 Diagnosis: Trophozoites ovoid, 50-300 µm, with a hyaline, extremely flexible, membranous test. Nuclei numerous, 11.6-16.2 µm in diameter,

Read More »


 Lieberkuehniidae  Siemensma, Holzmann, Apothéloz-Perret-Gentil, Clauß, Voelcker, Bettighofer, Khanipour Roshan, Walden, Dumack and Pawlowski, 2020 Diagnosis: Multinucleate organic-walled monothalamous foraminifera. Test very flexible, elongated to broadly

Read More »