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Noun
1. protostomeSee also 新口動物
Wikipedia definition
2. ProtostomeProtostomia (from Greek meaning "mouth first") are a clade of animals. Together with the deuterostomes and a few smaller phyla, they make up the Bilateria, mostly comprising animals with bilateral symmetry and three germ layers. The major distinctions between deuterostomes and protostomes are found in embryonic development.
Read “Protostome” on English Wikipedia
Read “旧口動物” on Japanese Wikipedia
Read “Protostome” on DBpedia

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