“supracleithrum”的英文意思_释义_用法

单词

supracleithrum

释义

supracleithrum Zool.|s(j)uːprəˈklaɪθrəm|
Pl. -cleithra.
[supra- 1 c.]
A dermal bone dorsal to the cleithrum in the pectoral arch of some fishes and amphibians.
1905A. Sedgwick Student's Text-bk. Zool. II. vii. 162 These bones are now often called supracleithrum, cleithrum and clavicle respectively.1949A. S. Romer Vertebr. Body vii. 179 Above each cleithrum there are usually additional elements—typically a supracleithrum and post-temporal, and sometimes other bones as well—which curve upward and forward above the gill chamber and anchor the dermal girdle to the skull.1981Pearson & Ball Lect. Notes Vertebr. Zool. iv. 52/1 Large clavicles occur in paleoniscoids and Polypterus, with large cleithra and smaller postcleithra, supracleithra, and post-temporals above them.

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