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sirkulasi udara di atmosfer

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Anthozoa (anemones, corals)<br />

Plathyhelminthes Turbellaria (flatworms)<br />

Aschelminthes Nematoda (roundworms)<br />

Annelida Polychaeta (bristle worms,<br />

lugworms)<br />

Mollusca Gastropoda (snails dan sea-glugs)<br />

Lamellibranchiata (biyalves)<br />

Cephalophoda (cuttlefish and squids)<br />

Anthropoda Crustacea (especially ostracods,<br />

copepods, cirripedes,<br />

malacostracans)<br />

Echinodermata Crinoidea (sea-lilies)<br />

Holothuroidea (sea-cucumber)<br />

Echinoidea (sea-urchins)<br />

Asteroidea (starfish)<br />

Ophiuroidea (brittle stars)<br />

Hemichordata Enteropneusta(2 corn-worms)<br />

chordata Urochordata(sea-squirts)<br />

Cephalochordata(amphioxus)<br />

Mereka mempunyai kisaran ukuran yang sangat luas yaitu dari yang<br />

berukuran sebesar protozoa hingga sebesar crustacea dan mollusca. Ukuran ini<br />

kadang-kadang <strong>di</strong>pakai sebagai dasar klasifikasi.<br />

1. Microfauna<br />

Istilah ini <strong>di</strong>pakai untuk menerangkan hewan-hewan yang mempunyai<br />

ukuran

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