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A
choanoflagellate

B
parazoa

C
placazoa

D
porifera

E
eumetazoa

F
radiata

G
cnidaria

H
ctenophora

I
bilateria

J
acoelomates

K
platyhelminthes

L
eucoelomata

M
pseudocoelomates

N
rotifera

O
nematoda

P
bryozoa, ectoprocta

Q
brachiopoda

R
phoronida

S
protostomes

T
deuterostomes

U
nemertea

V
mollusca