This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Find sources: "Nassophorea" – news · newspapers · books · scholar · JSTOR(January 2018) (Learn how and when to remove this message)
Nassophorea
Nassula sp.
Scientific classification
Domain:
Eukaryota
Clade:
Diaphoretickes
Clade:
SAR
Clade:
Alveolata
Phylum:
Ciliophora
Infraphylum:
Ventrata
Class:
Nassophorea Small & Lynn 1981
Typical orders
Synhymeniida
Nassulida
Microthoracida
The Nassophorea are a class of ciliates.[1] Members are free-living, usually in freshwater but also in marine and soil environments. The mouth is anterior ventral and leads to a curved cytopharynx supported by a prominent palisade of rods or nematodesmata, forming a structure called a cyrtos or nasse, typical of this and a few other classes. When present, extrusomes take the form of fibrous trichocysts. Cilia are usually monokinetids, but vary from order to order.
The Synhymeniida and Nassulida have mostly uniform cilia arising from monokinetids. Among the former, and a few members of the latter, there is a series of small polykinetids running from below the mouth to the left side of the body and sometimes almost circling the cell, called a frange or synhymenium. Other forms only have three oral membranelles, sometimes extending out of the oral cavity, with or without a paroral membrane. These are usually medium in size, sometimes larger, and cylinder shaped.
The Microthoracida typically have three or more oral membranelles, with at least a vestige of the paroral membrane occurring during cell division. The body cilia are sparse, and often arise from dikinetids, with cirrus-like polykinetids occurring in the marine genus Discotricha. These are usually small and ellipsoid or crescent shaped, with the right side of the body curved outward, and generally have a rigid pellicle.
As first defined by Eugene Small and Denis Lynn in 1981, the Nassophorea also included the peniculids and, in a separate subclass, the hypotrichs. More recent schemes restore these to their earlier positions, leaving this group a relatively small collection of less well-known forms.
^Margulis, Lynn; Chapman, Michael J. (2009). Kingdoms and Domains: An Illustrated Guide to the Phyla of Life on Earth. Academic Press. p. 601. ISBN 9780080920146. Retrieved 20 January 2018.
The Nassophorea are a class of ciliates. Members are free-living, usually in freshwater but also in marine and soil environments. The mouth is anterior...
two suborders by Small and Lynn in 1985, who placed them in the class Nassophorea, owing to ultrastructural peculiarities such as the presence of nematodesmata...
Puytorac, Grain & Mignot 1987] Class Colpodea Small & Lynn 1981 Class Nassophorea Small & Lynn 1981 Class Phyllopharyngea de Puytorac et al. 1974 Class...
Intramacronucleata that unites the classes Phyllopharyngea, Colpodea, Nassophorea, Prostomatea, Plagiopylea and Oligohymenophorea. It is equivalent to...
Global Information
