The phrase "assignment of genera" is correct and usable in written English.
It can be used in contexts related to biology, taxonomy, or classification where the categorization of organisms into genera is being discussed.
Example: "The assignment of genera in this study helps clarify the relationships between different species."
Alternatives: "classification of genera" or "designation of genera".
Still, due to the difficulties of sampling from such a large number of often poorly known species, the assignment of some genera is still awaiting confirmation.
Below, we list the familial and subfamilial assignment of all squamate genera from the December , 2012update of the Reptile Database [ 1], updated to reflect some recent changes and the proposed subfamily level changes listed above.
Due to the uncertainty surrounding the simplified mesogleal arrangement and its subsequent use in assignment of species to genera, we propose that Epizoanthus cutressi West is hereby reassigned to the genus Parazoanthus with the new binomen Parazoanthus cutressi (West), as indicated by molecular and ecological characters that demonstrate its affiliation with Parazoanthus [ 32, 35].
In addition, a text provides all justifications for the definition of supra-generic compartments, for assignment of species richness of genera not sampled in our chronograms, and for occasionally ignoring such missing genera.
Due to a lack of molecular sampling, the assignment of the Arabian bufonid species to genera, and therefore biogeographic origin, has long been problematic.
The lack of assignment of these sequences to the Pseudomonas genera (Table S2) may partially explain some of the lower percentages of Pseudomonas detected by pyrosequencing compared to FISH among multiple sampling time points.
Practical tools (key illustrations, descriptions of character) are provided to facilitate the assignment of approximately 680 extant and 100 fossil genera.
Species names can be repeated between genera (so lots of genera have a species termed 'magnus' for big or 'annectens' for different etc)., but genera must be unique.
Circumscription of genera within the family.
Some families have hundreds of genera, others have only a few.
