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Acantholaimus
Genus, Roundworm (Nematoda), Marine
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Actinonema
Genus, Roundworm (Nematoda), Marine
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Adoncholaimus
Genus, Roundworm (Nematoda), Marine
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Aegialoalaimus
Genus, Roundworm (Nematoda), Marine
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Amphimonhystera
Genus, Roundworm (Nematoda), Marine
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Angiostoma
Genus, Roundworm (Nematoda), Marine, terrestrial
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Anguillicoloides
Genus, Roundworm (Nematoda), Freshwater, marine
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Anoplostoma
Genus, Roundworm (Nematoda), Marine
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Anticoma
Genus, Roundworm (Nematoda), Marine
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Antomicron
Genus, Roundworm (Nematoda), Marine
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Aphanolaimus
Genus, Roundworm (Nematoda), Freshwater, marine, terrestrial
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Aponema
Genus, Roundworm (Nematoda), Marine
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Araeolaimus
Genus, Roundworm (Nematoda), Marine
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Ascolaimus
Genus, Roundworm (Nematoda), Marine
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Atrochromadora
Genus, Roundworm (Nematoda), Marine
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Axonolaimus
Genus, Roundworm (Nematoda), Marine
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Bastiania
Genus, Roundworm (Nematoda), Marine, terrestrial
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Bathylaimus
Genus, Roundworm (Nematoda), Marine
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Belbolla
Genus, Roundworm (Nematoda), Marine
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Bolbolaimus
Genus, Roundworm (Nematoda), Marine