Over the course of his career, he described 541 species.

He described more than 4,000 species new to science in this work.

There are three described species at present, with more likely to be added.

He described many new species mainly in the following works.

There are 7 described species, all found in southern Africa.

He has described many new species of fish including several sharks.

There is no recent information on any of the five described species from south east Asia.

He would describe several species while working with his uncle.

There are about seven described species, including three from western Australia.

There are at least 28 described species, but new ones continue to be discovered occasionally.