The author described some new species and genera of the fossil woods from Mesozoic of Western Liaoning besides Xenoxylon latiporosum (Cramer) Gothan, X. hopeiense Chang, X. liaoningense Duan et Wang, X. yixia...The author described some new species and genera of the fossil woods from Mesozoic of Western Liaoning besides Xenoxylon latiporosum (Cramer) Gothan, X. hopeiense Chang, X. liaoningense Duan et Wang, X. yixianense Zhang et Shang, Protopiceoxylon yizhouense Duan et Cui. They are Protopiceoxylon chaoyangense Duan sp. nov., Araucarioxylon batuense Duan sp. nov., Taxoxylon liaoxiense Duan sp. nov. and an old species Araucarioxylon sidugawaense Shimakura.展开更多
The fossil plant female reproductive organs each with a tricarpous were collected from the Yixian Formation, Chaoyang district, western Liaoning Province. The geological age of the Yixian Formation here is believed to...The fossil plant female reproductive organs each with a tricarpous were collected from the Yixian Formation, Chaoyang district, western Liaoning Province. The geological age of the Yixian Formation here is believed to be Late Jurassic, which places this fossil as the oldest angiosperm currently known. Its morphological characters are distinct from other known angiosperm reproductive organs as it has 3 ovaries, each with a terminal style and an apical stigma. 9 such organs compose a cyme. As this morphological arrangement is unique to this plant, a new genus and species has been established, named Chaoyangia liangii gen. et sp. nov.展开更多
文摘The author described some new species and genera of the fossil woods from Mesozoic of Western Liaoning besides Xenoxylon latiporosum (Cramer) Gothan, X. hopeiense Chang, X. liaoningense Duan et Wang, X. yixianense Zhang et Shang, Protopiceoxylon yizhouense Duan et Cui. They are Protopiceoxylon chaoyangense Duan sp. nov., Araucarioxylon batuense Duan sp. nov., Taxoxylon liaoxiense Duan sp. nov. and an old species Araucarioxylon sidugawaense Shimakura.
文摘The fossil plant female reproductive organs each with a tricarpous were collected from the Yixian Formation, Chaoyang district, western Liaoning Province. The geological age of the Yixian Formation here is believed to be Late Jurassic, which places this fossil as the oldest angiosperm currently known. Its morphological characters are distinct from other known angiosperm reproductive organs as it has 3 ovaries, each with a terminal style and an apical stigma. 9 such organs compose a cyme. As this morphological arrangement is unique to this plant, a new genus and species has been established, named Chaoyangia liangii gen. et sp. nov.
