frustule


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Related to frustule: diatom

frustule

[′frəs‚chül]
(invertebrate zoology)
The shell and protoplast of a diatom.
A nonciliated planulalike bud in some hydrozoans.
References in periodicals archive ?
at 1720 magnification is presented in Figure 1(a), while the porous frustule of the Coscinodiscus sp., obtained at magnification of 1.119 x [10.sup.4] times, is shown in Figure 1(b).
The frustules are usually linear or lanceolate in both valve and girdle view, but some species are asymmetric along the apical axis in valve view.
Frustules cylindrical in girdle view, joined in short chains, frequently of two cells and rarely of three, four or eight cells, separated by short strutted processes.
The surprisingly detailed and delicate structure of the frustules could be seen with the optical instrumentation commonly available in the 19th century.
The ability of juvenile abalone to ingest algae depends on the size of the abalone in relation to the algal cell size, the attachment strength of the alga to the substratum, and the strength of the algal cell wall or the outer frustule of diatoms (Kawamura et al.
In addition, cells of the sizes observed (frustule lengths of 15 to 151 [mu]m) are basically absent from the water column at that time of the year, while they contribute from 53% to 85% of all particles contained within the ice bottom community during the ice algal bloom periods (Manes and Gradinger, 2009).
A guide to the morphology of the diatom frustule. Freshwater Biological Association 44, Ambleside, England.
Again, the average biovolume of each taxon was estimated by entering mean diatom measurements into geometric equations that best described the three-dimensional shape of the frustule (Gruendling 1971).
The average biovolume of each taxon was estimated by entering mean diatom measurements into geometric equations that best describe the three-dimensional shape of the frustule (Gruendling 1971).
The frustule itself can be fantastically ornate, covered in patterned ridges and pores in geometric designs.
In some abalone species, it has been suggested that the dietary value for the juveniles differs among benthic diatom species, which have different morphologies, sizes, frustule strengths (Kawamura et al.