world of amoeboid organisms

Mayorella, slow locomotion

Mayorella vespertilioides Page, 1983

Diagnosis: Locomotive form with L/B ratio usually 1.2-4.6; floating form star-shaped, with long slender, pointed and radiating pseudopodia; nucleus spherical, with a central nucleolus; small paired crystals, usually 1.5 µm; cuticula 180-200 nm thick.

Dimensions: Page: 35-90 µm, L/B 1.2-4.6; nucleus 5.6-10.0 µm. My measurements: c. 60-70 µm; nucleus 7.4-10.4 µm.

Ecology: Freshwater, Europe.

Remarks: I found this species in wet Sphagnum and dry mosses on trees. Hard to tell if it is the same species.

Mayorella species
Mayorella vespertilioides
Recent posts

Actinosphaeridium spec.

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.

Read More »


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

Read More »

Leptomyxa spec.

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

Read More »

Zivkovicia spec.

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

Read More »

Pontigulasia pentangulostoma

P. pentangulostoma, after Quin et al., 2008 Pontigulasia pentangulostoma Quin, Y., Xei, S., Gu, Y. and Zhou, X., 2008 Diagnosis: Shell is brown, laterally uncompressed,

Read More »

Flabellula citata

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

Read More »