Assulina discoides
Assulina discoides , after Bobrov, Shimano and Mazei, 2012

Genus Deharvengia Bobrov, Shimano and Mazei, 2012

Diagnosis: Shell large in size, disc shaped, colorless, transparent, narrow-elliptical in cross-section. The breadth of the shell usually exceeds the length. Aperture is narrow-elliptical with an uneven narrow organic lip. Aperture diameter is about 1/3 of the shell breadth. Surface is covered by large narrow elliptical idiosomes up to 10 µm in length and 5-6 µm in breadth. The population is monomorphic. Variation coefficients of all the morphological characteristics are small.

Dimensions: Length 84-88 µm; width 83-88 µm; breadth 23-27 µm; aperture 26-30 µm.

Ecology: Soil. Mikuriga-pond, Murodo, Japan. Mountain pine (Pinus pumila) vegetation; organic surface
layer of soil consisting mainly of fallen needles (coniferous semi-decomposed litter – organic surface soils). Mountain gravelly seasonally freezing soils with high moisture content formed on volcanic rocks.

Reference: Bobrov. A., Shimano, S., Mazei, Y. (2012). Two New Species of Testate Amoebae from Mountain Forest Soils of Japan and Redescription of the Genus Deharvengia Bonnet, 1979. Acta Protozool. (2012) 51: 55–63.

Recent posts

Cryptodifflugia key 2

1 Shell is distinctly compressed laterally 2 – Shell is not compressed or slightly compressed laterally 7 2 Oval aperture C. compressa angustioris – Circular

Read More »

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 »