world of amoeboid organisms

Alepiella tricornuta 1 ventral view, 2 profile, after Golemansky, 1970

Genus Alepiella Golemansky, 1970

Diagnosis: Test elongated, compressed dorso-ventrally and decorated with three horns: one at the fundus and two laterally. Test covered with small scales and platelets of different shape, embedded in a clear chitinoïd cement. The pseudostome, placed obliquely in relation to the longitudinal axis, is provided with a widening of the test having in ventral view the appearance of a wide and clear disc.

Alepiella tricornuta Golemansky, 1970

Diagnosis: Test elongated, compressed dorso-ventrally, colorless and translucent; fundus prolonged in a hollow and tubular horn. Test also adorned with two lateral horns as hollow and tubular, but directed forward that gives the species a rather bizarre aspect. Test covered with small scales and platelets of different shapes, embedded in a clear chitinoid cement. Often, larger exogenous elements are observed in the pseudostomal region. Pseudostome circular and placed obliquely to the longitudinal axis. In the region of the pseudostome, the test flares out in a broad and clear collar, surrounding the aperture. In lateral view, this flare has the appearance of a wide and short funnel, while in ventral view it is present in the form of a disk surrounding the pseudostome.

Dimensions: Total length: 85-90 μm, total width: 40-45 μm, hornless width: 20-25 μm, thickness: 16-21 μm horn length: 15-22 μm, pseudostome: 10-13 μm, pseudostomal flare: 27-32 µm.

Ecology: Alepiella tricornuta has so far been observed from only one locality on the Black Sea shore: Alepou beach, located 20 km south of v. Sosopol. The species was found 5-7 m from the sea at a depth in the sand equal to 90 cm (25.IV.1968 and 9.X.1968). It seems to be a rather rare species in the Black Sea coastal psammal.

Recent posts

Euglypha bryophila

Euglypha bryophila, after Brown, 1911 (L), from Ecuador (R) Euglypha bryophila  Brown, 1911 Diagnosis: (Original description) The test is very regular in form and subject

Read More »


(A) A Scenedesmus cell (arrow) is engulfed by a trophozoite. (B) Several Scenedesmus cells adhere to the surface of a plasmodium that has numerous vacuoles

Read More »

Actinosphaeridium spec.

Actinosphaeridium spec. Diagnosis: Cell surrounded by a membranous shell, with an outer mucous layer. Filopodia with granules, sometimes branching. Cell stalked. Ecology: I found this

Read More »


Euglyphidion enigmaticum – after Bonnet, 1960 Genus Euglyphidion Bonnet, 196 Diagnosis: Shell hyaline, ovoid, pseudostome circular or slightly elliptical. Shell loosely covered with two types of

Read More »

Leptomyxa spec.

Leptomyxa sp., slowly retracting in response to the light of the microscope Leptomyxa sp. Diagnose: This is a very large amoeba which I found in

Read More »

Zivkovicia spec.

Zivkovicia spec., 200 µm long; the right image is viewed through the aperture Zivkovicia spec.  Diagnosis: Shell pyriform, circular in oral view, with a clear

Read More »