Microworld

world of amoeboid organisms

Menu
Choanocystis rhytidos
From Siemensma, 1991

Choanocystis rhytidos (Dürrschmidt, 1987) Siemensma, 1991

Diagnosis: Periplast, 35-40 µm in diameter (measurement based on whole mount), with two types of scales; details of protoplast unknown. Spine scales, 9-12 µm long, bipartite, consisting of shaft and base-plate. Shaft cylindrical, 0.19 µm in diameter, presumably solid and slightly tapering towards the distal end, abrupt apically ending with 2-4 marginal teeth. Base-plate heart-shaped, 1.3 µm in diameter, Plate scales, 3.8-4 x 2.2-2.6 µm, elliptical or pear-shaped, ornamented by radially-arranged, branched furrows of different length. The area of the axial thickening and a narrow submarginal strip are smooth.

Distribution: Chile, New Zealand.

Remarks: A. rhytidos is common in Chile and New Zealand. Apart from the type locality it was found in samples from a semi-swamp forest on the shores of the Rio Oscuro, 35 km south of Puerto Montt, Chile, in swamps near Maramaranui, swamps near Lake Whangape, swamps aside the Manganahoe Lagoon, North Island, New Zealand and on the South Island in a swamp in the Buller Gorge. Temperature ranges from 7 to 12 °C, pH from 5.2—7.4, and conductivity from 20—800 pS25.

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

 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 »