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

Difflugia key ovoid

Difflugia Group 1 Key characters: Test < 60 µm. Test in cross section rounded. Test with rounded fundus. Pseudostome with smooth circular edge. Test not

Read More »

Difflugia: ovoid tests

Difflugia – group 1 Test < 60 µm. Test in cross section rounded. Test with rounded fundus. Pseudostome with smooth circular edge. Test not spherical

Read More »

Difflugia ampla

Difflugia ampla, after Rampi, 1950 (l) and Gauthier-Lièvre et Thomas, 1958 (r) Difflugia ampla Rampi, 1950 Diagnosis: Test broadly pyriform, with a wide and rounded

Read More »

Difflugia parva

Difflugia parva, from Gauthier-Lièvre et Thomas, 1958 Difflugia parva  (Thomas, 1954) Ogden, 1983 = Difflugia oblonga var. parva Thomas, 1954 Diagnosis: Test pyriform, tapering evenly from

Read More »