Arthropods, at about a million species, are the largest, most diverse phylum.
Mollusks at about 70, 000 to 110,000 species are the second most diverse phylum of animal species.
Mollusks at about 70, 000 to 110,000 species are the second most diverse phylum of animal species.
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Athropods. Their the dominant species, in the Animalia Kingdom. It reins over 75% in the Mollusc category.