Table 1. Number of known valid nominal species in Brazil according to the Catálogo Taxonômico da Fauna do Brasil (CTFB) followed by the approximate percentage of increase (+) or decrease (–) from the estimations of Lewinsohn and Prado (2015) (third column), and estimated known number of species in the world by Chapman (2009).
| Taxon |
CTFB (until January 1 st, 2024) |
Brazil (Lewinsohn and Prado 2005) |
World (Chapman 2009) |
| Acanthocephala |
71 (+42%) |
30–50 |
1,150 |
| Acoelomorpha |
33 |
– |
– |
| Annelida |
1,833 (+67%) |
1,000–1,100 |
17,763 |
| Arthropoda |
102,931 (-13%) |
88,790–118,290 |
1,141,139 |
| Brachiopoda |
3 (-25%) |
4 |
~350 |
| Bryozoa |
520 (+83%) |
284 |
– |
| Chaetognatha |
25 (+39%) |
18 |
~70 |
| Chordata |
9,617 (+34%) |
7,120–7,150 |
64,788 |
| Cnidaria |
831(+76%) |
470 |
9,795 |
| Ctenophora |
14 (+600%) |
2 |
~100 |
| Echinodermata |
348 (+6%) |
329 |
7,003 |
| Echiura |
7 (-22%) |
9 |
~140 |
| Entoprocta |
17 (+70%) |
10 |
~150 |
| Gastrotricha |
87 (+26%) |
69 |
~400 |
| Kinorhyncha |
5 (+400%) |
1 |
~150 |
| Loricifera |
1 |
0 |
~100 |
| Mollusca |
3,567 (+19%) |
2,400–3,000 |
~85,000 |
| Nematoda |
1,447 (-50%) |
1,280–2,880 |
Up to 25,000 |
| Nematomorpha |
16 (+33%) |
12 |
~240 |
| Nemertea |
39 (-0.9%) |
43 |
~900 |
| Onychophora |
23 (+475%) |
4 |
165 |
| Pentastomida |
17 |
– |
~130 |
| Phoronida |
4 (+100%) |
2 |
16 |
| Placozoa |
1 |
0 |
1 |
| Platyhelminthes |
2,292 (-0.3%) |
1,040–2,300 |
20,000 |
| Porifera |
628 (+57%) |
300–400 |
~6,000 |
| Priapulida |
1 |
1 |
17 |
| Rotifera |
606 (+33%) |
457 |
~2,000 |
| Sipuncula |
39 (+30%) |
30 |
– |
| Tardigrada |
95 (+42%) |
67 |
~750 |
| Total |
125,138 |
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