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world of amoeboid organisms

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Order EUGLYPHIDA Copeland 1956, emend. Cavalier-Smith 1997
Test of organic material; most taxa with secreted silica scales held together by an organic cement; tubular mitochondrial cristae.
 
 Euglyphidae Wallich 1864, emend. Lara et al., 2007
Test with thin elliptical scales; presence of specialized scales around the pseudostome with typical indentation.
Euglypha.

 Assulinidae Lara et al. 2007

Acrostome test composed of elliptic plates disposed in a regular, alternate pattern; test strongly compressed; no specialized type of scales around pseudostome.
Assulina, Placocista, Valkanovia.

Trinematidae Hoogenraad & De Groot 1940, emend Adl et al. 2012

Test with bilateral symmetry; scales oval or round, sometimes of both types; specialized tooth-shaped scales around the aperture; aperture invaginated in some taxa.
Corythion, Playfairina, Puytoracia, Trinema.

Sphenoderiidae Chatelain et al, 2013

Test with self-secreted circular to elliptical silica scales of different sizes and shapes, but without indentations; pseudostome surrounded with small round or oval scales; usually its ventral side shorter.

Sphenoderia, Trachelocorythion.

Cyphoderiidae De Saedeleer 1934

Scales circular, oval or kidney-shaped, juxtaposed or imbricated; test aperture angled, some with collar.
Campascus, Corythionella, Cyphoderia, Messemvriella, Pseudocorythion, Schaudinnula.

Paulinellidae De Saedeleer 1934, emend. Adl et al. 2012

Pyriform, uncompressed shape; scales, when present, long, with length perpendicular to aperture. At least two genera (Ovulinata, Micropyxidiella ) with totally organic test without silica scales.

Ovulinata, Paulinella, Micropyxidiella.

Incertae sedis

Euglyphida: Ampullataria, Deharvengia, Euglyphidion, Heteroglypha, Matsakision, Pareuglypha, Pileolus, Sphenoderia, Tracheleuglypha, Trachelocorythion. 

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Kibisidytes

K. marinus, after Jepps, 1934 Kibisidytes marinus Jepps, 1934 Diagnosis: Small amoeboid organism occurring in the sea, attached to the surface film or to some

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Phaeobola

P. aeris from Dumack et al., 2000 Phaeobola Dumack et al., 2000 Diagnosis: Cells roundish to oval shaped. Shell colorless to amber-colored, rough surface, few

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Rhizaspis armata

R. armata, 68 µm long, excl. spines – Laegieskamp Rhizaspis armata (Lauterborn, 1901) Dumack et al., 2021 Basionym: Pamphagus armatum Lauterborn, 1890 Diagnosis: Theca membranous,

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Rhizaspis spinosa

The original description with original drawings, Penard, 1890. Rhizaspis spinosa (Penard, 1890) Dumack et al., 2021 Basionym: Trinema spinosum Penard, 1890 Diagnosis: Theca membranous, ovoid

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Difflugia “pseudoclaviformis”

Difflugia “pseudoclaviformis”, front and side view, 424 µm Difflugia “pseudoclaviformis” Diagnosis: Shell pyriform, compressed, with a more or less pronounced aboral protuberance; shell composed of

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Difflugia from Lolo Pass

Shells 461-448 µm, stacked image. I found this large en remarkable shells in sediment of a small mountain lake near Lolo Pass, Montana USA. It differs

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Foraminifer drome

Unknown species, collected from the river Drôme, France, 2021 Unknown species September 2021, I found about ten specimens of an agglutinated foraminifer in a sample

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Cyclopyxis spec

Cyclopyxis spec., 168 µm Cyclopyxis spec. Diagnosis: Shell circular in ventral and dorsal view, more or less hemispherical in lateral view (height/diameter ≈ 0.5); lateral

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Difflugia fallax

Difflugia fallax, from Penard, 1902 Difflugia fallax Penard, 1890 Diagnosis: Shell hyaline or yellowish-greenish, black at low magnification, round in cross section, formed of a

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