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How many species of invertibrates are on Earth?

Updated: 8/19/2019
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13y ago

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Exact number of invertibrate species is unknown. A rough estimate is as follows:

sponges - 10,000 species

cnidarian - 9,000 species

molluscus - 100,000 species

platyhelminths - 13,000 species

nematodoes - over 20,000 species

annelida - 12,000 species

anthropodis - crustaceans - 40,000 species, arachnids - 75,500 species, insects - over 800,000 estimated at 1-30 million species

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13y ago
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Q: How many species of invertibrates are on Earth?
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