Geopyxella sylvicola
G. sylvicola – from Bonnet & Thomas, 1955

Genus Geopyxella Bonnet & Thomas, 1955

Diagnosis: Test thick membrane, sub-globular or hemispherical, covered with thin siliceous particles; pseudostome ventral, central, round, in contrast to Cyclopyxis, not invaginated. Ventral surface smooth. Nucleus with one large central caryosome and several smaller peripheral nucleoli.

Two species and several subspecies.

Type species: Geopyxella sylvicola Bonnet & Thomas, 1955

Ecology: Due to its narrow niche the type species is a good indicator species for calcareous rendziniform soils.

Recent posts

Centropyxiella oopyxiformis

  Centropyxiella oopyxiformis, after Chardez, 1977   Centropyxiella oopyxiformis  Chardez, 1977 Diagnosis: Test elongated, dorso-ventrally compressed, fundus always smaller than the anterior part with an

Read More »

Centropyxiella lucida

  Centropyxiella lucida, after Golemansky, 1971   Centropyxiella lucida  Golemansky, 1971 Diagnosis: In ventral view, test elliptical with almost parallel sides with regular round ends.

Read More »

Centropyxiella golemanskyi

  Centropyxiella golemanskyi, after Chardez, 1977   Centropyxiella golemanskyi  Chardez, 1977 Diagnosis: In dorsal view, main part of the test almost circular, in lateral view

Read More »

Centropyxiella gibbulina

  Centropyxiella gibbulina, after Chardez et Thomas, 1980   Centropyxiella gibbulina  Chardez et Thomas, 1980 Diagnosis: Main part of the test almost spherical, with funnel-shaped

Read More »

Centropyxiella gibbula

  Centropyxiella gibbula, after Valkanov, 1970   Centropyxiella gibbula  Valkanov, 1970 Diagnosis: Main part of the test almost spherical, with funnel-shaped circular pseudostome. Test covered

Read More »

Centropyxiella elegans

  Centropyxiella elegans, after Chardez, 1980 (l) and 1984 (r)   Centropyxiella elegans  Valkanov, 1970 Diagnosis: Test ovoid, strongly flattened, covered with small mineral grains.

Read More »