Definition of form genus in English English dictionary
A collection of organisms that is given formal recognition at the rank of genus with a taxonomic name, but which is known to be an artificial group rather than a natural one
All fossilized roots of scale trees are assigned to the form genus 'Stigmaria'.
A genus of fossil plants or imperfect fungi classified according to their asexual organs
an artificial taxonomic category established on the basis of morphological resemblance for organisms of obscure true relationships especially fossil forms (biology) an artificial taxonomic category for organisms of which the true relationships are obscure