Hmmm...the article didn't copy. There is simply NO WAY 8 people could have ID'd, collected, fed and provided habitat for these animals for even a short period of time. Here's an excerpt and link to read the whole article:
Some Rough Estimates of Species Numbers
The estimated number of animals on our planet falls somewhere in the vast range of 3-30 million species (Erwin 1983, Wolosz 1988). How do we come up with that estimate? Let's take a look at some groups of animals to see how many species fall within the various categories.
If we were to divide all animals into two groups, invertebrates and vertebrates, an estimated 97% of all species would be invertebrates. Invertebrates include animals that lack backbones such as sponges, cnidarians, molluscs, platyhelminths, annelids, arthropods, and insects, to name just a few. Of all invertebrates, the insects are by far the most numerous. There are so many species of insects that scientists have yet to discover them all, let alone name or count them. Estimates of the total number of insect fall in the range of 1 to 30 million. The vertebrates represent the remaining 3% of all species and include species that are the most familiar to us: amphibians, reptiles, birds, fishes, mammals.
The list below provides estimates of the number of species within various groups of animals. The indentation levels in the list below reflect the taxonomic relationships between organisms. This means that the number of invertebrates includes all the groups that are below it in the hierarchy (sponges, cnidarians, etc.). Since not all groups are listed below, the number of a parent group is not necessarily the sum of child groups.
Animals: estimated 3-30 million species
|--Invertebrates: 97% of all known species
| `--+--Sponges: 10,000 species
| |--Cnidarians: 8,000-9,000 species
| |--Molluscs: 100,000 species
| |--Platyhelminths: 13,000 species
| |--Nematodes: 20,000+ species
| |--Annelida: 12,000 species
| `--+--Crustaceans: 40,000 species
| |--Insects: 1-30 million+ species
| `--Arachnids: 75,500 species
`--Vertebrates: 3% of all known species
`--+--Reptiles: 7,984 species
|--Amphibians: 5,400 species
|--Birds: 9,000-10,000 species
|--Mammals: 4,475-5,000 species
`--Ray-Finned Fishes: 23,500 species