Pompholyxophrys punicea, 24 µm

 

 

Genus Pompholyxophrys Archer, 1869

 

Diagnosis: Medium-sized amoebae, typically with a spherical or near spherical body coated with numerous delicate and perforated siliceous perles; filopodia emerge through the layer of perles. Cells feed on algae and detritus and have been reported from freshwater habitats.

 

Literature: Page and Siemensma (1991); Patterson (1985); Rainer (1968), Roijackers and Siemensma, 1988.

 

 

Key to the species:

1

Perles spherical

2

-

Perles not spherical

3

2

Perles different in size, 1-6 µm, dried perles regular in outline

P. punicea

-

Perles of the same size, up to 1.2 µm; dried perles irregular in outline

P. exigua

3

Perles long, bone-shaped or rod-shaped

P. ossea

-

Perles otherwise shaped

4

4

Perles ovoid, not strongly compressed

P. ovuligera

-

Perles strongly compressed, flattened or discoid

5

5

Perles flattened, in outline circular or elliptical

P. degrooti

-

Perles discoid, with slightly convex sides

6

6

Dried perles slightly torn, with a central hole; no pillars inside

P. stammeri

-

Dried perles usually not deformed, sometimes with a small central hole; with pillars

P. stellata

 

Pompholyxophrys punicea

Pompholyxophrys punicea, with branched filopodium