Definition of Hemichordata in English:
Hemichordata
plural noun ˌhɛmɪkɔːˈdeɪtəˌheməkôrˈdādä
Zoology A small phylum of marine invertebrates that comprises the acorn worms.
Example sentencesExamples
- The superphyla Deuterostomia (e.g., Chordata, Echinodermata, Hemichordata) and Protostomia each appear to have evolved from an ancestor with a coelomic body cavity.
- Another of Ax's hypotheses concerns the Hemichordata.
- Deuterostomia are a major group of metazoans composed of three phyla: Chordata, Hemichordata, and Echinodermata.
- The superphylum Deuterostomia contains the diverse phyla Chordata and Echinodermata and the minor phyla Hemichordata and Urochordata.
- Metamorphosis in the acorn worms (Hemichordata, Enteropneusta) includes retention of the entire larval body, which sheds feeding and propulsory cilia and undergoes definitive shape changes.
Origin
Modern Latin (see hemi-, Chordata).