Microchlamys
Microchlamys
Microchlamys spec. n=nucleus Second specimen from Huizen

 

Microchlamys n. spec.

This species has a characteristic nucleus, broadly ovoid, where the nucleolar material is arranged peripherally. It was first discovered by Martin Kreutz, who published photomicrographs on a German forum in 2014. Shortly after I found several specimens in a small pond not far from the village of Huizen in the central area of the Netherlands. Food vacuoles contain small algae.

Dimensions: my measurements: shell Ø 47-50 µm, nucleus 10-10.9 µm; Martin Kreutz: shell Ø 42-64 µm.

Microchlamys
Microchlamys
Microchlamys spec. with three contractile vacuoles; n=nucleus
Microchlamys spec. Laegieskamp; notice the up to twelve contractile vacuoles in the periphery.
Microchlamys
Microchlamys
Microchlamys spec. nucleus arrowed – Laegieskamp, and at right structure of the dorsal side of the test.
The photomicrographs below were made by Martin Kreutz, who sent them to me. He thought it was Microchlamys patella, but the arrangement of the nucleolar material is quite different from the central nucleolus as described for Microchlamys patella.
Microchlamys
KV=contractile vacuole
Microchlamys
Fa=folds, KV= contractile vacuole, Mo=pseudostome
Microchlamys
Mo=pseudostome, Fa=folds in the membrane
Microchlamys
ZK=nucleus, S=shell, Mb=membrane
Microchlamys
Mo=pseudostome, Fa=folds in the membrane
Microchlamys
Recent posts

Raphidocystis glabra

after Zlatogursky et al., 2018 Raphidocystis glabra Dürrschmidt, 1985 Diagnosis: Periplast 40-50 μm in diameter; spine-scales 4.6–15 μm; plate-scales 6-7 × 3-3.5 μm; tiny teeth

Read More »

Raphidocystidae

Raphidocystidae Zlatogursky, 2018 Diagnosis: centrohelids with monolayered plate-scales covering cell surface. Plate-scales with a hollow inflected margin. Sometimes trumpet-shaped or tubular spine-scales present, forming an

Read More »

Planhoogenraadia liboica

P. liboica – from Bonnet, 1979 Planhoogenraadia liboica Bonnet, 1979 Diagnosis: . Test relatively flat, with a dorsal convexity. Shell widest in the center. Aperture deep

Read More »

Deharvengia papuensis

Deharvengia papuensis, after Bonnet, 1979 Deharvengia papuensis  Bonnet, 1979 Diagnosis: Theca large, ovoid, very regular, colorless. Elliptical pseudostome bordered by a thick yellowish lip or

Read More »