Nebela Temporal range: Pleistocene–Recent | |
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Nebela flabellulum | |
Scientific classification ![]() | |
Domain: | Eukaryota |
Clade: | Amorphea |
Phylum: | Amoebozoa |
Class: | Tubulinea |
Order: | Arcellinida |
Family: | Hyalospheniidae |
Genus: | Nebela Leidy 1874 |
Type species | |
Nebela collaris (Ehrenberg 1848) Leidy 1879 | |
Species | |
Synonyms | |
Nebela is a diverse genus of testate amoebae of cosmopolitan distribution, belonging to the family Hyalospheniidae. [1] They are "prey agglutinated" or "kleptosquamic" organisms, meaning they take the inorganic plates from their prey to construct their test. [2]
Members of this genus have a thin, transparent, pseudochitinous, flattened test that can be ovate, pyriform or elongate, with a length of around 180 microns. The surface of the test has numerous oval or circular scales of variable size, or in rare occasions rectangular or rod-like scales. The protoplasm is granular and colorless but can contain food vacuoles that show color. They have a single nucleus and a variable number of pseudopodia that are blunt in shape. The cell body is attached to the test's interior by strands of ectoplasm. [1]
Nebela originally belonged to the family Nebelidae, but phylogenetic analyses showed that the genus was paraphyletic and the genera Hyalosphenia and Quadrulella , which belong to Hyalospheniidae, branch within Nebela. Accordingly, the family Nebelidae was synonymised with Hyalospheniidae. [3]
There are at least 13 remaining species in the genus:
The paraphyly of Nebela is slowly being resolved by transferring species from Nebela to other genera through phylogenetic analyses. [3] The following species were previously considered Nebela but have been moved accordingly:
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