| 释义 |
Cephalochordata, n. Zool.
Brit. |ˌkɛf(ə)ləʊkɔːˈdɑːtə|, |ˌkɛf(ə)ləʊkɔːˈdeɪtə|, U.S. |ˌsɛfəloʊkɔrˈdeɪdə|, |ˌsɛfəloʊkɔrˈdɑdə|[see also cephalo- comb. form]
[‹ cephalo- comb. form + Chordata n. Compare scientific Latin Cephalochorda (F. M. Balfour Treat. Compar. Embryol. (1881) II. xii. 27).]
With pl. concord: a small subphylum or class of elongated, fish-like marine invertebrates within the phylum Chordata, comprising the lancelets. Also: the members of this group (collectively or individually); lancelets. Cf. Amphioxus n.
1885F. J. Bell Compar. Anat. & Physiol. v. 193 In the Cephalochordata we find an arrangement which reminds us of what obtains in the Annulata. 1949New Biol. 6 113 The Cephalochordata are easily recognised as similar to the true vertebrates. 1962D. J. Merrell Evol. & Genetics xiii. 142 The phylum Chordata has three subphyla: 1. Urochordata or Tunicata—the tunicates or sea squirts or ascidians. 2. Cephalochordata—amphioxus or the lancelets. 3. Vertebrata—the back-boned animals or vertebrates. 2005Trends in Genetics 21 506/2 Cephalochordata:..these are the closest living non-craniate relatives of vertebrates, and contain all chordate features, yet lack the cranial and sensory complexity of the vertebrate clade. |