A recognized taxonomic expert should be appointed as reference taxonomist for each taxonomic group to facilitate taxonomic standardization within that group.

In the second sentence, replace "species" with "taxonomic group".

To which taxonomic class do snails and slugs...?

In the second sentence, replace “same species” with “same taxonomic group”.

Participants recommended that contractors collaborate with each other and with other scientists to coordinate taxonomic descriptions.

This expert will be responsible for taxonomic quality control within the taxon.

Nonetheless, these habitats exhibit high levels of endemism, often at a higher taxonomic level than species.

It was also recognized that taxonomic research is largely carried out in museums, so that such organizations are likely to be particularly, but not exclusively, useful for taxonomic coordination.

It was agreed that supplying contractors with such collections would be an important contribution toward ensuring taxonomic standardization.

The bioaccumulation of lindane has been observed for most taxonomic groups, from plants and algae to vertebrates.