英语词汇“stigmaria”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

stigmaria

/stɪɡˈmɛːrɪə

noun (plural stigmariae /stɪɡˈmɛːrɪiː/) Palaeontology

A fossilized root of a giant lycopod, common in Carboniferous coal measures.

Class Lycopsida, in particular the genera Lepidodendron and Sigillaria.

The round nodes on the surface of the stigmaria are scars where ribbon-like rootlets were once attached and arranged radially about the stigmaria like the bristles of a bottle brush....

The rhizomes, or root systems, of both genera, known as stigmariae, were thought to be distinct plants when their fossils were first discovered.
Stigmariae are most often found in layers of clay below coal seams; the clay layer is thought to represent the layer of soil below the coal swamps.

Derivatives

stigmarian

adjective ...

On the right side is a close-up of a stigmarian axis with the typical spiral arrangement of scars.
Undisturbed layering around the stigmarian roots is consistent with their sedimentary burial, not with the intrusion of roots into an already layered soil.
Standing trees were not preserved within the six examples, but stigmarian roots extended away from the base of three of them.

Origin

Mid 19th century: modern Latin, from Greek stigma, with reference to the scars where rootlets were attached, covering the fossils.

单词	stigmaria
释义	stigmaria /stɪɡˈmɛːrɪə / noun (plural stigmariae /stɪɡˈmɛːrɪiː/) Palaeontology A fossilized root of a giant lycopod, common in Carboniferous coal measures. Class Lycopsida, in particular the genera Lepidodendron and Sigillaria. The round nodes on the surface of the stigmaria are scars where ribbon-like rootlets were once attached and arranged radially about the stigmaria like the bristles of a bottle brush.... The rhizomes, or root systems, of both genera, known as stigmariae, were thought to be distinct plants when their fossils were first discovered. Stigmariae are most often found in layers of clay below coal seams; the clay layer is thought to represent the layer of soil below the coal swamps. Derivatives stigmarian adjective ... On the right side is a close-up of a stigmarian axis with the typical spiral arrangement of scars. Undisturbed layering around the stigmarian roots is consistent with their sedimentary burial, not with the intrusion of roots into an already layered soil. Standing trees were not preserved within the six examples, but stigmarian roots extended away from the base of three of them. Origin Mid 19th century: modern Latin, from Greek stigma, with reference to the scars where rootlets were attached, covering the fossils.
随便看	isolator Isolde isoleucine isoline isomer isomerase isomeric isomerism isomerize isomerous isometric isometrically isometrics isometry isomorph isomorphic isomorphism isomorphous -ison isoniazid isonitrile isooctane isopach isophote isopleth