Tunicata and Cephalochordata, collectively named Protochordata, are filter-feeding marine animals which, as invertebrate members of the phylum Chordata, share with vertebrates the basic chordate characteristics. Tunicata are found at all latitudes and can assume a planktonic or benthic lifestyle. Coloniality is widespread and a larval stage followed by metamorphosis is the rule in the class Ascidiacea. Blooms of pelagic tunicates are quite common in warm seasons: their ecological relevance relies on the key role played by these animals in the alimentary chain of open seas. Cephalochordata are small, fish-like animals living in sandy bottoms, of interest for evolutionary studies.
Tunicata and Cephalochordata
BALLARIN, LORIANO;
2002
Abstract
Tunicata and Cephalochordata, collectively named Protochordata, are filter-feeding marine animals which, as invertebrate members of the phylum Chordata, share with vertebrates the basic chordate characteristics. Tunicata are found at all latitudes and can assume a planktonic or benthic lifestyle. Coloniality is widespread and a larval stage followed by metamorphosis is the rule in the class Ascidiacea. Blooms of pelagic tunicates are quite common in warm seasons: their ecological relevance relies on the key role played by these animals in the alimentary chain of open seas. Cephalochordata are small, fish-like animals living in sandy bottoms, of interest for evolutionary studies.
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