According to this lists, Sponge and Trichoplax are animal species without neurons.
Sponge (source)
Trichoplax adhaerens / Placozoa (source)

According to this lists, Sponge and Trichoplax are animal species without neurons.
Sponge (source)
Trichoplax adhaerens / Placozoa (source)

[…] Animals Without Neurons. En wikipedia en español: Placozoa (Trichoplax adhaerens) […]
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