| 释义 |
‖ stigmaria Geol.|stɪgˈmɛərɪə|
Pl. -æ.
[mod.L., f. stigma, in reference to the marks or scars on the fossil: see below.]
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 attrib.
1845Lyell Trav. N. Amer. I. 84, I was curious to know whether the Stigmariæ would be found here in the under⁓clays. 1846Proc. Amer. Philos. Soc. IV. 274 The fossil plant known as stigmaria was the root of a sigillaria. 1851Mantell Petrifactions i. §2. 37 fig., Erect stem of Sigillaria with Stigmaria-roots; in a coal-mine in Nova Scotia. 1885Geikie Text-Bk. Geol. vi. ii. iv. §1 (ed. 2) 728 There can be little doubt..that Stigmaria was a type of root common to more than one kind of tree.
Hence stigˈmarian a., belonging to, or containing remains of, Stigmaria; stigˈmarioid a., resembling Stigmaria.
1855J. Phillips Man. Geol. 218 This is the under-clay—the stigmarian bed. 1902Ann. Bot. XVI. 559 The vascular branches of Stigmarian rootlets. |