单词 | protichnite |
释义 | > as lemmasprotichnite protichnite n. Brit. , U.S. [after scientific Latin Protichnites, ichnogenus name (R. Owen 1852, in Q. Jrnl. Geol. Soc. 8 214)] Palaeontology a fossil trail (consisting of a thin groove bordered by small impressions) occurring in Cambrian sandstone and attributed to an early arthropod; now only (in form Protichnites) as ichnogenus name.ΚΠ 1866 Proc. Royal Soc. 15 382 We have a startling example of the sudden development in very early times of the highest types of molluscan life, Nautili, Lituites, Trilobites, Protichnites, &c. 1880 Libr. Universal Knowl. VII. 772 The sandstone beds which contain the protichnites. 1942 Sci. Monthly Jan. 38/2 The other [fossil trail] is Protichnites, which consists of a thin line between small impressions. 1987 Jrnl. Paleontol. 61 645/2 Protichnites..includes trails in which a drag mark is bordered by two rows of imprints. < as lemmas |
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