| 释义 |
chelicerate, a. and n. Zool.
Brit. |kəˈlɪs(ə)rət|, U.S. |kəˈlɪs(ə)rət|
[‹ chelicera n. + -ate suffix2. In senses A. 2 and B. after Chelicerata n.]
A. adj.
1. Possessing chelicerae or jointed pincers.
In later use not always distinguishable from sense A. 2.
1890Jrnl. Microsc. & Nat. Sci. 3 139 McIntire points out the difficulty in giving credence to so great a change in mouth organs, as that from the suctorial one of Hypopus, to the mandibulate (or chelicerate at any rate) form in Gamasus. 1909Cent. Dict. (Suppl.) Chelicerate, bearing cheliceræ, or small pincers, as the appendages of the merostome crustaceans. 1940Jrnl. Paleontol. 14 611/2 The cephalothorax bears six pairs of uniramous legs, the first chelicerate.
2. Of or relating to the arthropod group Chelicerata. Cf. mandibulate adj. 1b.
1949W. C. Allee et al. Princ. Animal Ecol. xxxiv. 680/1 Examples are provided by the horseshoe crabs, branching from the base of the chelicerate arthropods. 1970Biol. Bull. 139520 (title) Control of molting in mandibulate and chelicerate arthropods by ecdysones. 1998Cladistics 14 173 The phylogeny of the extant chelicerate orders is examined. 2004Nature 21 Oct. 978 The large chelate first appendage is consistent with a chelicerate affinity for the pycnogonids.
B. n. An arthropod of the group Chelicerata.
1951Encycl. Brit. II. 458/1 Class I. Xiphosurida.—Large, marine chelicerates. 1989S. J. Gould Wonderful Life (1991) 106 Most modern chelicerates have six uniramous appendages on the prosoma. 1999T. Pratchett et al. Sci. of Discworld xxx. 218 We knew..just four conventional types of arthropod: trilobites (now extinct), chelicerates (spiders, scorpions), crustaceans (crabs, shrimp), and uniramians (insects and others). |