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What is Hemichordata: Characteristics and Examples about?

Hemichordata and Chordata are two phyla that share characteristics with each other and with echinoderms. Hemichordata includes acorn worms and pterobranchs. Acorn worms live in tubes in the sand and have a proboscis, collar, and trunk. Pterobranchs form small colonial structures and filter feed using cilia. Chordata includes tunicates, lancelets, and vertebrates. Tunicates are sessile and filter feed using two siphons. Lancelets are nearly transparent and filter feed buried in sand. Both phyla demonstrate t

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ayon

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