19.1 Comments can be added at the end of each family, generic, specific, or infraspecific entry, but should be concise. Discussion normally concerns problems of nomenclature, taxonomy, distribution, or biology that highlight further research needs. If a taxon is considered to be threatened or endangered, special attention should be drawn to this. Unlike descriptions, discussions must be in grammatically correct English sentences.
 
19.2 Authors are particularly encouraged to include a short supplementary paragraph after each species description to clarify differences between closely related species and highlight characters which are particularly useful in identifications.