world of amoeboid organisms

Menu
Cocinocassis pontigulasiformis
C. pontigulasiformis, c. 60 µm large – Tirol, Austria, stacked image

 

Conicocassis pontigulasiformis  (Beyens, Chardez & De Bock, 1986)

Diagnosis: The shells are divided in a perfectly spherical body with an usually small circular aperture and a large, more or less funnel-like visor. The spherical part has a darker color than the visor; both parts are composed of granular organic cement, ornamented with some mineral grains and diatom frustules; the wall of the visor is relatively thin, with an outward curved veil. No living specimens were observed.

Dimensions: spherical compartment c. 60-66 µm large (n=18)

Ecology: Peat bogs in het Hol and Laegieskamp, the Netherlands, Rotes Wasser, Germany and Tirol, Austria.

Remarks: This characteristic species resembles in structure Centropyxis species, but differs from that genus in the smooth spherical body and the large pronounced funnel-like conical visor.
I have found this species in the Netherlands in the seventies (see my drawings below) and in 2012, in samples from Tirol, Austria, where it also has been found by Angie Opitz (pers. comm.). She found living individuals. I found many specimens in a sample from the peatland area Rotes Wasser in Germany, sampled by Steffen Clauss.
The shells on this page have been photographed from material which has been collected in peat bogs in Tirol, Austria. The drawings are from material from the Netherlands.
The identity of these findings with C. pontigulasiformis as described by Beyens, Chardez and De Bock (1986) has been confirmed by Louis Beyens (pers. comm.)

Centropyxis pontigulasiformis

Spherical part about 66 µm – Tirol, Austria, stacked image
Centropyxis pontigulasiformis
About 66 µm – Tirol, Austria, stacked image.
Centropyxis pontigulasiformis
Spherical part about 60 µm – Tirol, Austria, stacked image
Centropyxis pontigulasiformis
Conicocassis pontigulasiformis – the aperture is clearly visible
Centropyxis pontigulasiformis
Centropyxis pontigulasiformis
I made this drawings in 1977 from samples from the Hol, the Netherlands. They show the variation in shape of the collar or visor.
Centropyxis pontigulasiformis
Centropyxis pontigulasiformis
From Laegieskamp
Centropyxis pontigulasiformis
Centropyxis pontigulasiformis

The photomicrographs below have been made by Angie Opitz, Tirol, Austria.

Centropyxis pontigulasiformis
Centropyxis pontigulasiformis
Centropyxis pontigulasiformis
Centropyxis pontigulasiformis
Centropyxis pontigulasiformis
Centropyxis pontigulasiformis
Centropyxis pontigulasiformis
Centropyxis pontigulasiformis
Recent posts

Sphenoderia compressa

Sphenoderia compressa, after Badewitz, 2002 Sphenoderia compressa Badewitz, 2002 Diagnosis: Test ovoid, oval in cross section, hyaline, covered with relatively small, oval, rather irregularly arranged

Read More »

Tracheleuglypha elongata

T. elongata, A-C after Thomas and Gauthier-Lièvre, 1959; D after Van Oye, 1959 Tracheleuglypha elongata Van Oye, 1959 Diagnosis: Test similar to T. dentata, but

Read More »

Tracheleuglypha acolla

T. acolla, after Bonnet and Thomas, 1960 Tracheleuglypha acolla Bonnet and Thomas, 1955 Diagnosis: Test ovoid, non compressed, round in cross-section, with large oval overlapping

Read More »

Cyclopyxis kahli oblonga

C. kahli f. oblonga , after Tarnogradskii, 1959 Cyclopyxis kahli f. oblonga  (Tarnogradskii, 1959) Centropyxis kahli f. oblonga Tarnogradskii, 1959 Diagnosis:  Test with all the

Read More »

Cyclopyxis leclercqi

Cyclopyxis leclercqi – from Beyens and Chardez, 1986 Cyclopyxis leclercqi Beyens and Chardez, 1986 Diagnosis: Shell circular in apertural view, dorso-ventrally compressed with a swollen

Read More »

Haplomyxa saranae

Haplomyxa saranae Dellinger, 2014 Diagnosis: cell body from small rounded (0.1 mm) to large elongated shape (up to 3.5 x 0.3 mm), usually flat but

Read More »