world of amoeboid organisms

Menu
Cornutheca saccifera, from Wailes, 1913

 
Genus Cornutheca Kosakyan, Lahr, Mulot, Meisterfeld, Mitchell and Lara 2016

Diagnosis: Test elongated-pyriform, with a distinct neck, lateral margins tapering towards the aperture. Two lateral horns, pointing towards the posterior part of the test, either free or connected to the main part of the test by a lateral keel surrounding the posterior part of the test. Test hyaline or slightly yellowish, composed of circular to elongated shell plates probably recycled from euglyphid testate amoeba prey. Differential diagnosis. Members of this genus differ from other hyalospheniid genera in the presence of two lateral horns.

Type species: Cornutheca ansata (Leidy, 1879) Kosakyan, Lahr, Mulot, Meisterfeld, Mitchell and Lara 2016.

Included taxa: All Nebela taxa bearing two lateral horns, such as N. ansata, N. saccifera and N. hippocrepis.

     

Recent posts

Polychaos spec.

Polychaos spec. Polychaos spec. Diagnosis: Large amoeba with an irregular more or less polypodial shape during slow locomotion; uroid finely papillated, usually very large fasciculate

Read More »

Spiculophrys

Genus Spiculophrys Zlatogursky, 2016 Diagnosis: Centrohelids lacking silica scales but with numerous thin, pointed organic (without any traces of silica) scales tapering towards acute apices. 18S

Read More »

Acanthocystis drakena

From Zlatogursky, 2016 Acanthocystis drakena Zlatogursky, 2016 Diagnosis: Cells are 21.1-30.5 µm (ca. 26.7) in diameter. Cell is covered with oval plate-scales having a margin

Read More »

Choanocystis symna

From Zlatogursky, 2014 Choanocystis symna Zlatogursky, 2014 Diagnosis: Cell body ca. 6.7 µm in diameter. Axopodia three–five times longer than a cell diameter. Plate-scales dumbbell-shaped

Read More »

Acanthocystis costata

From Zlatogursky, 2014 Acanthocystis costata Zlatogursky, 2014 Diagnosis: Cell body ca 9.5 µm in diameter. Axopodia 2–3 times longer than cell diameter. Length of spine-scales

Read More »

Kinetocyst

Left: ultra-structure of a kinetocyst of Raphidiophrys contractilis); right: two kinetocysts in an axopodium. Kinetocysts In centrohelid heliozoa, extrusomes are called kinetocysts, and are present

Read More »