Foraminifera

Lacrogromia cassipara
Lacrogromia cassipara

Foraminifera are unicellular eukaryotes characterized by the presence of granuloreticulopodia and the possession of a membranous, agglutinated, or calcareous test, which is either monothalamous (single-chambered) or polythalamous (multi-chambered) (Loeblich and Tappan 1987). Within monothalamids some species like Reticulomyxa filosa are amoeboid naked forms. Until 1859, foraminifera were only known from marine habitats, but that year Claparède and Lachmann described a monothalamid foraminifer, Lieberkuehnia wageneri, sampled from an unknown water body in Berlin. It had a smooth flexible test with an entosolenian tube that separated the main cytoplasm mass from the pseudopodial peduncle. In 1886 Henri Blanc, a Swiss scientist, described another freshwater foraminifer, Gromia brunneri, which he had collected from the bottom of Lake Geneva. This single-chambered species had an agglutinated test, an organic layer covered and/or embedded with foreign, mainly non-organic, particles. In subsequent years, Eugène Penard, another Swiss protozoologist, described four similar species Gromia gemma and G. squamosa (1899), G. linearis (1902) and G. saxicola (1905) from the same lake. He also described G. nigricans (1902), which he found not far from Lake Geneva in Mategnin and a marsh near Rouelbeau.

Limnogromia saxicola

Recent posts

Campascus cyphoderiformis

Campascus cyphoderiformis – After Chardez et Gaspar, 1984 Campascus cyphoderiformis  Chardez et Gaspar, 1984 Diagnosis: Test very clear, hyaline, consisting of endogenous scales of 1.2

Read More »

Campascus insterstitialis

Campascus interstitialis – After Golemansky, 1981 Campascus interstitialis  Golemansky, 1981 Diagnosis: Test elongated, in the shape of a bottle with a curved, colorless, transparent and

Read More »

Campascus triqueter

Campascus triqueter – After Penard, 1899 and 1891 Campascus triqueter  Penard, 1899 Diagnosis: Test brownish or yellowish, build of organic material embedded with a large

Read More »

Campascus bidens

Campascus bidens – After Krascheninnikov, 1923 Campascus bidens Krascheninnikov, 1923 Diagnosis: Test as C. minutus, but with, in ventral view, two small tooth-like projections, facing

Read More »

Campascus dentatus

Campascus dentatus – After Edmondson and Kingman, 1913 Campascus dentatus Edmondson and Kingman, 1913 Diagnosis: Shell of yellowish, chitinoid material similar in general outline to

Read More »

Campascus simcoei

Campascus simcoei – After Nicholls, 2003 Campascus simcoei Nicholls, 2003 Diagnosis: Protoplast is Cyphoderia-like, with long, branching, filose pseudopods and included numerous, small spherical reddish-orange

Read More »