Diatomisissa
Diatomisissa is a fictional genus of freshwater diatoms designed for illustrative purposes in this article. Diatoms are unicellular algae with intricate siliceous cell walls, or frustules, that display a wide range of shapes and ornamentation. The imagined genus Diatomisissa is described as having elongated, boat-shaped frustules with a clearly defined central area and a raphe running along one valve. The valve surfaces are ornamented with fine, parallel striae that form a regular lattice at moderate magnification. Sizes are typically in the range of 20 to 60 micrometers in length and about 6 to 12 micrometers in maximum width.
In terms of habitat, Diatomisissa is posited to occur in temperate freshwater systems, including rivers, lakes,
Taxonomically, the name is a neotype created for demonstration, derived from diatom and the suffix -issa. Some
The concept serves to illustrate methods used to describe diatom morphology and ecology.