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| Shaolinopteris gen. nov., a new fern rhizome genus with solenostele from the Jurassic of Northeast China and its palaeogeographic and taxonomic implications |
| Ning Tiana,b,*, Zi—Hui Shengc, Fang—Yu Lid, Ning Lua, Meng—Yu Chena, Wen—Tao Liua |
aCollege of Palaeontology, Shenyang Normal University, Shenyang 110034, China;
bKey Laboratory of Evolution of Past Life in Northeast Asia, Ministry of Natural Resources, Shenyang 110034, China;
cBusiness School, Jiangsu Normal University, Xuzhou 221000, China;
dCollege of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, China |
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Abstract China possesses an abundant fossil record of Mesozoic ferns, predominantly preserved as leaf compressions or impressions. In contrast, permineralized fern fossils revealing anatomical details are comparatively rare. Recently, a novel permineralized flora was discovered from the Middle Jurassic Xinmin Formation in Horqin Right Wing Middle Banner, Northeast China, yielding diverse permineralized plant remains. Here, we report a new permineralized fern rhizome genus Shaolinopteris gen. nov. from this flora. The new genus is anatomically characterized by a solenostele with exarch protoxylem, a homogeneous pith, a two—layered rhizome cortex, and "Dennstaedtia—type" adventitious roots featuring diarch protoxylems. Notably, the rhizome inner cortex comprises aerenchymatous columns. Anatomical analysis of Shaolinopteris indicates probable phylogenetic affiliation with the extant fern family Dennstaedtiaceae. Furthermore, a comprehensive revision of the fossil diversity and palaeogeographical distribution of Mesozoic solenostelic fern rhizomes is presented. This new specimen constitutes the first documented occurrence of Mesozoic solenostelic ferns in continental East Asia, providing critical evidence for reconstructing the palaeophytogeography of these taxa.
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Received: 31 December 2024
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Corresponding Authors:
*No. 253 North Huanghe Street, Huanggu District, Post No.: 110034, Shenyang City, Liaoning Province, China. E—mail addresses: tianning84@163.com (N. Tian), 6020230122@jsnu.edu.cn (Z.—H. Sheng), 2421861919@qq.com (F.—Y. Li), ninglu@synu.edu. cn (N. Lu), mychenpaleo@163.com (M.—Y. Chen), 1360027912@qq.com (W.—T. Liu).
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2026, Vol. 15 
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