ArticleBMC ecology and evolution2022
Re-study of Guangdedendron micrum from the Late Devonian Xinhang forest.
Article in BMC ecology and evolution, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed, 16 citations in OpenAlex.
- Article
- Article
- Fern-like Plants Establishing the Understory of the Late Devonian Xinhang Lycopsid Forest.Life (Basel, Switzerland) · 2024Article
- A New Fern-like PlantBiology · 2022Article
- Reinvestigation of the Late Devonian LycopsidBiology · 2022Article
- A Late Devonian tree lycopsid with large strobili and isotomous roots.Communications biology · 2022Article
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Authors and funding
6 authors at 4 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundGuangdedendron micrum is the Late Devonian tree lycopsid that made up Xinhang fossil forest in Anhui, China, showing the earliest stigmarian rooting system. Based on new specimens of this lycopsid, the roots bearing rootlets, terminal parts of stems, vegetative leaves and monosporangiate strobili containing megaspores are researched in detail.
resultsThe roots with four robust rhizomorphs are largely expanded and approach the size of those of the Late Carboniferous giant tree lycopsids in swampy forests. The rootlets along rhizomorphic axis leave oval to circular scars after abscission. Narrow-fusiform leaf cushions display a leaf scar, vascular bundle and ligule pit. Cylindrical megasporangiate strobili are borne singly, in pairs, or occasionally once-dichotomized. Of each megasporophyll, the pedicel consists of a keel and possibly undeveloped alations, and the long-triangular lamina presents a heel. Megasporangium is sessile and contains multiple Lagenicula megaspores with distinct spines and a large gula.
conclusionsG. micrum displays large terminal monosporangiate strobili probably adapted to turbulent condition, and its megasporophylls together with multiple Lagenicula-type megaspores hint a possible primitive evolutionary status. These characteristics provide new insights into the evolution of fertile traits of early lycopsids.
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