Hartmannellidae – Microworld

Family Hartmannellidae Volkonsky, 1931

Uninucleate amoebae, monopodial with a cylindrical pseudopodium when active. Most floating forms without radiating pseudopodia. Nucleus with a prominent central nucleolus.

1	Distinctive hyaline zone in locomotive form	*Hartmannella* *Copromyxa*
–	Hyaline zone in locomotive form reduced or absent	2
2	Uroid, if present, reduced	*Cashia*
–	Uroid, often bulbous and villous	3
3	Cytoplasm often with prominent crystals or inclusions	*Saccamoeba*
–	Cytoplasm without crystals	*Glaeseria*

Ferry Siemensma
Created February 27, 2019
Last updated February 03, 2021

Actinosphaeridium spec.

February 24, 2021

Actinosphaeridium spec. Actinosphaeridium spec. Diagnosis: Cell surrounded by a kind of membranous shell. Filopodia with granules, sometimes branching. Cell not stalked, at least not observed.

Euglyphidion

February 24, 2021

Euglyphidion enigmaticum – after Bonnet, 1960 Genus Euglyphidion Bonnet, 196 Diagnosis: Shell hyaline, ovoid, pseudostome circular or slightly elliptical. Shell loosely covered with two types of

Leptomyxa spec.

February 16, 2021

Leptomyxa sp., slowly retracting in response to the light of the microscope Leptomyxa sp. Diagnose: This is a very large amoeba which I found in

Zivkovicia spec.

February 15, 2021

Zivkovicia spec., 200 µm long; the right image is viewed through the aperture Zivkovicia spec. Diagnosis: Shell pyriform, circular in oral view, with a clear

Pontigulasia pentangulostoma

February 13, 2021

P. pentangulostoma, after Quin et al., 2008 Pontigulasia pentangulostoma Quin et al., 2008 Diagnosis: Shell is brown, laterally uncompressed, parted to neck and body regions

Flabellula citata

February 11, 2021

Flabellula citata, from Dykova et al., 2008 Flabellula citata Schaeffer, 1926 Diagnosis: Length in locomotion 15-75 µm; width 25-55 µm. Shape very variable, from a

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