单词 | stigmaria |
释义 | stigmarian. Geology. A former genus of fossil plants, whose remains are found abundantly in the coal-measures; they consist of branching bodies, covered with regularly arranged depressions or scars, and are now commonly believed to be the roots of Sigillaria and possibly other trees, the scars being the points of attachment of the rootlets. Also attributive. ΘΚΠ the world > plants > particular plants > plants and herbs > fossil plants > [noun] cycadite18.. Bothrodendron1835 lepidodendron1836 calamite1837 sphenophyllum1837 stigmaria1845 polyporite1846 fucoid1848 Muscites1859 lepidodendrid1863 Bennettites1871 lepidodendroid1872 progymnosperm1885 pteridosperm1904 Bennettitales1907 seed fern1907 1845 C. Lyell Trav. N. Amer. I. 84 I was curious to know whether the Stigmariæ would be found here in the under~clays. 1847 Proc. Amer. Philos. Soc. 1843–7 4 274 The fossil plant known as stigmaria was the root of a sigillaria. 1851 G. A. Mantell Petrifactions i. §2. 37 fig. Erect stem of Sigillaria with Stigmaria-roots; in a coal-mine in Nova Scotia. 1885 A. Geikie Text-bk. Geol. (ed. 2) vi. ii. iv. §1. 728 There can be little doubt..that Stigmaria was a type of root common to more than one kind of tree. Derivatives stigˈmarian adj. and n. (a) adj. belonging to, or containing remains of, Stigmaria; (b) n. a fossil plant of the genus Stigmaria. ΘΚΠ the world > plants > particular plants > plants and herbs > fossil plants > [adjective] stigmarian1855 Mesophytic1880 calamitic1883 calamitean1895 Bennettitalean1917 parichnos1969 stigmarioid- 1855 J. Phillips Man. Geol. 218 This is the under-clay—the stigmarian bed. 1902 Ann. Bot. 16 559 The vascular branches of Stigmarian rootlets. 1920 Brit. Museum Return 137 A plaster cast of the Stigmarian, Dictyophloios minor. Thesaurus » Categories » stigˈmarioid adj. resembling Stigmaria. This entry has not yet been fully updated (first published 1916; most recently modified version published online June 2020). < n.1845 |
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