Microworld

world of amoeboid organisms

Hyalodiscus rubicundus
H. rubicundus, Crailoo, Netherlands, 2023

Hyalodiscus rubicundus Hertwig & Lesser, 1874

Diagnosis: Cells discoid with breadth greater than length. Extensive, flattened hyaline margin surrounding the cytoplasmic hump anteriorly and laterally and sometimes posteriorly. Locomotion frequently rapid with a distinctive rolling motion. Fine, short subpseudopodia extend from the hyaloplasm. Floating form with radiate pseudopodia. Cytoplasmic mass usually reddish brown or greenish in color with 1 or 2 nuclei.

Hyalodiscus rubicundus
Hyalodiscus rubicundus
Hyalodiscus rubicundus  notice the fine filopodia
Hyalodiscus rubicundus
Hyalodiscus rubicundus
Nucleus, arrowed
Hyalodiscus rubicundus
Hyalodiscus rubicundus
Hyalodiscus rubicundus, with very fine filopodia
Hyalodiscus rubicundus
Hyalodiscus rubicundus in Phase contrast; note the vacuoles, granules and filopodia

Hyalodiscus rubicundus
Hyalodiscus rubicundus
Nucleus
Hyalodiscus rubicundus
Hyalodiscus rubicundus
Note the fine filopodia which arise from the surface of the veil.
Hyalodiscus rubicundus
Drawings: Ferry Siemensma
Hyalodiscus rubicundus
Drawings: Ferry Siemensma
Ferry Siemensma, created March 2, 2019; last modified July 20, 2023
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