Members of this genus have a thin, transparent, pseudochitinous, flattenedtest that can be ovate, pyriform or elongate, with a length of around 180microns. The surface of the test has numerous oval or circular scales of variable size, or in rare occasions rectangular or rod-like scales. Theprotoplasm is granular and colorless but can contain foodvacuoles that show color. They have a singlenucleus and a variable number ofpseudopodia that are blunt in shape. The cell body is attached to the test's interior by strands ofectoplasm.[1]
Nebela originally belonged to the family Nebelidae, but phylogenetic analyses showed that the genus wasparaphyletic and the generaHyalosphenia andQuadrulella, which belong toHyalospheniidae, branch withinNebela. Accordingly, the family Nebelidae was synonymised withHyalospheniidae.[3]
Theparaphyly ofNebela is slowly being resolved by transferring species fromNebela to other genera through phylogenetic analyses.[3] The following species were previously consideredNebela but have been moved accordingly:
^abcLoeblich, Alfred Richard; Tappan, Helen (1964). Moore, Raymond C. (ed.).Treatise on Invertebrate Paleontology, Part C: Protista 2, Sarcodina, Chiefly "Thecamoebians" and Foraminiferida. Vol. 1. The Geological Society of America & The University of Kansas Press.ISBN978-0813730035.{{cite book}}:ISBN / Date incompatibility (help)
^Beyens L, Chardez D (1982). "Cryptodifflugia angustastoma et Nebela carinatella, nouveaux Thécamoebiens des tourbières dans la Campine beige".Archiv für Protistenkunde.126 (2):169–172.doi:10.1016/S0003-9365(82)80047-X.ISSN0003-9365.
^Bonnet L (1979). "Nouveaux thécamoebiens du sol X".Bulletin de la Société d'Histoire Naturelle de Toulouse.115:106–118.
^abNicholls KH (2015). "Nebela kivuense Gauthier-Lievre et Thomas, 1961 (Amoebozoa, Arcellinida), Missing for a Half-century; Found 11,500 km from "home"".Acta Protozoologica.54 (4):283–288.doi:10.4467/16890027AP.15.023.3537.ISSN0065-1583.
^abQin Y, Man B, Kosakyan A, Lara E, Gu Y, Wang H, Mitchell EAD (2016). "Nebela jiuhuensis nov. sp. (Amoebozoa; Arcellinida; Hyalospheniidae): A New Member of the Nebela saccifera - equicalceus - ansata Group Described from Sphagnum Peatlands in South-Central China".The Journal of Eukaryotic Microbiology.63 (5):558–566.doi:10.1111/jeu.12300.PMID27593700.S2CID24354110.
^Duckert C, Blandenier Q, Kupferschmid FAL, Kosakyan A, Mitchell EAD, Lara E, Singer D (30 April 2020). "Case 3782 – Nebela militaris Penard, 1890 (Arcellinida, Hyalospheniidae): proposed conservation of the specific name by giving it precedence over Nebela bursella Taranek, 1881".The Bulletin of Zoological Nomenclature.77 (1):22–28.doi:10.21805/bzn.v77.a007.hdl:11380/1301647.S2CID218783898.
^Owen III, Goronwy; Jones, E. E. (1976). "Nebela tuberculata comb. nov. (Arcellinida), its History and Ultrastructure".The Journal of Eukaryotic Microbiology.23 (4):485–487.doi:10.1111/j.1550-7408.1976.tb03819.x.
