CHART II: ANIMAL KINGDOM
Divisions
Estimated
Number
of Species
d
Taxonomic Classifications
3,000
15
120
70,000 ,
Protozoa
15,000
(acellular animals)
Mesozoa
—
Porifera
5,000
(sponges)
Coelenterata
10,000
(coelenterates)
Ctenophora
100
(comb jellies)
Platyhelminthes
(flat worms)
Nemertinea
(nemertine worms]
Aschelminthes
3
Acanthocephal
Entoprocta
b
Ectoprocta
b
(moss animals))
Phoronida
Brachiopoda
(lamp shells)
Mollusca
(mollusks)
Sipunculoidea
Annelida
0
(segmented worms)
Arthropoda
(arthropods)
Chaetognatha
30 '
(arrow worms)
Echinodermata
5,000
(echinoderms)
Hemichordata
Chordata
(including
) ►
60,000
vertebrates)
>Radiata
β,οοοΊ
VAcoelomates
500 f
;s
a *\
ala
a J
i
•
7,ΟΟθ|
VPseudocoelomates
KProtostomia/
-Bilateria
►Schizocoela
6,500 >Eucoelomates\
750,000
^•Enterocoela>Deuterostomia|
a Includes Rotifera, Gastrotricha, Kinorhyncha, Nematoda, Nematomorpha, Priapuloidea. Formerly called Nemathelminthes.
b Formerly in Bryozoa.
c Includes Echiuroidea.
d Taken from "Händbook of Biological Data" (4), p. 533.
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