Microworld

world of amoeboid organisms

Menu
Diplophrys archeri
Diplophrys archeri

Diplophrys archeri Barker, 1868

Diagnosis: Cell spherical or somewhat elliptical, covered with a thin, hyaline and colorless membrane; two circular pseudostomes situated at two more or less opposite poles; cytoplasm colorless, transparent, finely granulated, filling the envelope except near the two pseudostomes; a single nucleus with a nucleolus; one or more contractile vacuoles; one large, or two or three small, grayish, yellow, red or orange colored, oil-like globules present; pseudopodia extremely attenuate, in locomotive cells radiating, straight or dichotomously branched, in stationary cells curved and branched and attached to the substrate; reproduction by fission or tetrad division. Young cells frequently aggregated into colonies which form circular masses about 30-60 µm in diameter or more; from the periphery of which slender pseudopodia radiate.

Dimensions: solitary cells 8-20 µm in diameter, young cells in a colony 2-4 µm in diameter.

Ecology: solitary or in groups; on submerged plants or in debris in fresh water. Common in different types of water.

Diplophrys archeri
Diplophrys archeri - Ferry Siemensma
Diplophrys archeri
Diplophrys archeri - Ferry Siemensma
Diplophrys archeri in locomotion
Diplophrys archeri - Ferry Siemensma
Diplophrys archeri, filopodia in contact with the substrate
Diplophrys archeri
Diplophrys archeri, with filopodia extended along the substrate and heavily branched (Leitz 100X Phaco).
Diplophrys archeri - Ferry Siemensma
Diplophrys archeri
Dividing cell
Dividing cell, surrounded by bacteria and cell surrounded by xenosomes
Diplophrys archeri
Diplophrys archeri - Ferry Siemensma
Diplophrys archeri
Diplophrys archeri
Diplophrys archeri, with several globules
Diplophrys archeri
This specimen came from the same wet mount as the one above.
Diplophrys archeri
Diplophrys archeri
Recent posts

Organic-walled species

Specimen with an optical cross-section of the peduncle (left) Organic-walled species Diagnosis: Multinucleated organic-walled monothalamous foraminifera. Test spherical to oval shaped, with a hyaline, flexible,

Read More »

Velamentofex tyrolensis

V. tyrolensis, two specimens Velamentofex tyrolensis Völcker and Clauß, 2020 April 2022, I found two specimens in a sample from the pond in Crailoo, Netherlands. I could

Read More »

Raphidiophrys spec. nov.

Raphidiophrys n. sp. Raphidiophrys n. sp. Diagnosis: Plate-scales canoe-shaped, elongated, with tapering, rounded poles, slightly curved upwardly. Light microscopically, these plate-scales show a clear rim;

Read More »

Lacogromia spec. Naardermeer

Lacogromia sp., Naardermeer, the Netherlands, 2022 (n=nucleus) Lacogromia sp. Six living specimens were found in an old sediment sample from a freshwater ditch in nature

Read More »

Sphenoderia rhombophora

S. rhombophora , after Bonnet, 1966 Sphenoderia rhombophora Bonnet, 1966 Diagnosis: Test hyaline, ellipsoidal, very slightly compressed. Fundus relatively narrow. Pseudostome largely truncated. Neck very

Read More »

Sphenoderia ovoidea

S. ovoidea , after Jung, 1942 Sphenoderia ovoidea Jung, 1942 Diagnosis: Shell with four layers of plate-scales. Distinguished from S. fissirostris by the ovoid tapering

Read More »

Sphenoderia truncata

S. truncata , after Van Oye, 1949 Sphenoderia truncata Van Oye, 1949 Diagnosis: Shell smooth and diaphanous, with usually pentagonal, sometimes hexagonal, inconspicuous plates. The

Read More »

Nebela gimlii

N. gimlii, from Singer and Lara, 2015 Nebela gimlii Singer and Lara, 2015 Diagnosis: Test wide pyriform or drop-shaped, laterally compressed, with a protruding narrow

Read More »

Sphenoderia, with granules

Overview Sphenoderia S. compressa S. fissirostris S. labiata S. lenta S. macrolepis S. minuta S. ovoidea S. rhombophora S. sphaerica S. splendida S. truncata

Read More »

Nebela overview

Nebela overview N. acolla N. aliciae N. aliciae N. barbata N. bohemica N. carinatella N. collaris N. flabellulum N. gimlii N. golemanskyi N. nebeloides N.

Read More »