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frustule
frustule (ˈfrʌstjuːl) [a. F. frustule, ad. late L. frustulum, dim. of frustum.] The siliceous two-valved shell of a diatom, with its contents.1857 Berkeley Cryptog. Bot. §103. 130 The frustules which are long and slender, slip over each other, yet so as always to adhere. 1867 J. Hogg Microsc. ii. i....
Oxford English Dictionary
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Frustule
A frustule is the hard and porous cell wall or external layer of diatoms. References
External links
Frustule on Britannica
diatom frustule on astrographics.com
Geometry and Pattern in Nature 1: Exploring the shapes of diatom
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Pinnularia
The margins of the two thecae are covered by a connecting band called a cingulum and all together are referred to as a frustule, and the whole cell is
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testule
ˈtestule Bot. [ad. L. testula, dim. of testa shell.] The silicified crust or shell of a diatom: more usually called frustule.1891 in Cent. Dict.
Oxford English Dictionary
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Phycophthorum
These motile zoospores then settle and penetrate the frustule of a new diatom host through tubular processes that generate from the cell membrane.
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transversan
transˈversan, a. Bot. [f. as transverse a. + -an.] (See quot.)1900 B. D. Jackson Gloss. Bot. Terms 274/1 Transversan Plane, that which passes through the centre of a Diatom frustule vertically to the pervalvar axis (O. Mueller).
Oxford English Dictionary
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Gyrosigma
Like other diatoms, Gyrosigma has a siliceous cell wall called a frustule. The frustule is composed of two sections called valves, with one valve fitting inside the other valve similar to the two halves of a Petri dish.
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Cribellum
In certain groups of diatoms it refers to microscopically punctured regions of the frustule, or outer layer. Diatom cribellum
The perforated regions of the frustule, or outside layer of many forms of diatom also are called cribella.
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Thalassiosira
Thalassiosira have a cell wall made of silica, known as a frustule. This progeny can then emerge from the parental frustule (silica wall) and reconstruct its own cell wall, thus becoming a cell of a larger size.
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Asterionella
Reproduction
The silica skeleton of a diatom cell (called the frustule) consists of an epitheca and an hypotheca.
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Solenicola
S. setigera will grow on the frustule, the protective shell made of silica, of L. mediterraneus alongside the cyanobacteria Synechococcus, which it may
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Ditylum brightwellii
This hard, porous covering is known as the frustule and causes the cell to be more dense than the surrounding water.
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Chaetoceros pseudocurvisetus
Description
Like most marine diatoms, C. pseudocurvisetus is characterized by its frustule, or cell wall, which is composed of silicon dioxide and other The frustule forms as different sized valves, which overlap and are called thecae.
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Auxospore
This occurs because each daughter cell produced by cell division inherits one of the two valves that make up the frustule (a silica cell wall), and then
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Skeletonema
Skeletonema are cylindrical shaped with a silica frustule. Cells are joined by long marginal processes to form a filament [Horner 2002].
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