Gromia Dujardin
Synonym; Allogromia, Diplogromia, Rhynchogromia, Rhumbler (ref. ID; 1618)

[ref. ID; 1618]
Thin test rigid or flexible, smooth or slightly coated with foreign bodies; spherical to elongate ellipsoid; aperture terminal; one or more nuclei contractile vacuoles; many filopodia, branching and anastomosing; cytoplasm with numerous motile granules; fresh and salt water. (ref. ID; 1618)

[ref. ID; 1923]
Shell thick, spherical, rigid or slightly flexible, body filling the envelope. (ref. ID; 1923)

Gromia brunneri Blanc (ref. ID; 3693)
Gromia fluviatilis Dujardin (ref. ID; 1618, 1923, 2461, 3693)
Syn; Gromia terricola Leidy (ref. ID; 3693)
Gromia gemma Penard (ref. ID; 3693)
Gromia granulata F.-E. Schulze
See; Pamphagus granulatus (ref. ID; 3693)
Gromia hyalina Schlumberger
See; Pamphagus hyalinus (ref. ID; 3693)
Gromia linearis Penard, 1902 (ref. ID; 3693 original paper)
Gromia nigricans Penard, 1902 (ref. ID; 3693 original paper) reported year? (ref. ID; 1618)
Gromia ovoidea (Rhumbler) (ref. ID; 1618)
Gromia socialis Archer
See; Pamphagus hyalinus (ref. ID; 3693)
Gromia squamosa Penard (ref. ID; 3693)
Gromia terricola Leidy (ref. ID; 1923)
See; Gromia fluviatilis (ref. ID; 3693)

Gromia fluviatilis Dujardin (ref. ID; 1618, 1923, 2461, 3693)
Syn; Gromia terricola Leidy (ref. ID; 3693)
Description; Test spherical to subspherical; smooth or sparsely covered with siliceous particles; yellowish cytoplasm fills the test; aperture not seen; a large nucleus and numerous contractile vacuoles; filopodia long, often enveloping test; on aquatic plants, in moss or soil. (ref. ID; 1618)
Envelope spheric or subspheric, seldom changing shape; protoplasm habitually covering the surface of the envelop. Pseudopodia numerous, anastomosing. Habitat aquatic plants. (ref. ID; 1923)
Measurements; 90-250 um long. (ref. ID; 1618, 1923)

Gromia nigricans Penard, 1902 (ref. ID; 3693 original paper) reported year? (ref. ID; 1618)
Description; Test large, circular in cross-section; a single nucleus; in pond water among vegetation. (ref. ID; 1618)
Measurements; 220-400 um long. (ref. ID; 1618)

Gromia ovoidea (Rhumbler) (ref. ID; 1618)
Description; In salt water. (ref. ID; 1618)

Gromia terricola Leidy (ref. ID; 1923)
See; Gromia fluviatilis (ref. ID; 3693)
Description; This species possesses granulo-reticulate pseudopodia and is covered with foreign particles. (ref. ID; 1923)