world of amoeboid organisms

Centropyxis

Family Centropyxidae Jung, 1942

Diagnosis: Lobose testate amoebae with shell of granular organic material, dorsally with more or less mineral particles or diatoms, ventrally smooth or with much smaller grains; dorsal surface rounded, ventral side flat to concave, with a ventral aperture, which may be circular to uneven, but displaced towards one end; shell may be flattened at the apertural end; at the posterior end or all around the periphery some spines may be present.

Type genus: Centropyxis.

Genus Armipyxis was created by Dekhtiar (2009) to accommodate all species with internal struts. However, C. aculeata, although not mentioned in the original description, may also have struts. Being the type species of the genus Centropyxis, it can never be transferred to Armipyxis, making Armipyxis an invalid taxon.

Centropyxis discoides
Test of Centropyxis discoides, see detail below
Centropyxis discoides
The test consists of an organic layer of granular structure with embedded xenosomes, here several kind of diatoms, some with remnants of the chloroplast still present.
Ferry Siemensma, created March 3, 2019; last modified July 05, 2022
Recent posts

Filoreta sp.

Filoreta sp.? – Gaasterland, Netherlands, 2022 Filoreta sp. Diagnosis: Cell bodies spindle-shaped, connected by a large

Lees verder »

Filoretidae

Filoreta sp.? – Gaasterland, Netherlands, 2022 Family Filoretidae Cavalier-Smith and Bass, 2009 Diagnosis: Non-ciliate, bacterivorous rhizopods

Lees verder »