conodont
n.
[古生]牙形刺；牙形石
英語翻譯 Noun:
-
the tiny fossil cone-shaped tooth of a primitive vertebrate of order Conodonta
-
small (2 inches long) extinct eellike fish with a finned tail and a notochord and having cone-shaped teeth containing cellular bone; late Cambrian to late Triassic; possible predecessor of the cyclostomes
造句
用作名詞(n.)
- The Silurian strata containing abundant conodont fossils are well developed and comformable with the overlying Devonian strata in the Baizitian region, northern Yanbian, Sichuan.
四川省鹽邊縣北部稗子田地區的志留系發育良好，牙形刺化石極為豐富，與上覆泥盆系連續沉積，并呈整合接觸。
常用短語
-
fibrous conodont
纖維牙形蟲
-
compound conodont
復合牙形石
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