A New Gnetalean Macrofossil from the Mid-Jurassic Daohugou Formation

Macrofossil evidence has demonstrated a first radiation of gnetophytes in the Early Cretaceous. However, the origin of the diversity of gnetophytes remains ambiguous because gnetalean macrofossils have rarely been reported from pre-Cretaceous strata. Here, we report a new putative gnetalean macrofos...

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Bibliographic Details
Main Authors: Yong Yang, Zhi Yang, Longbiao Lin, Yingwei Wang, David Kay Ferguson
Format: Article
Language:English
Published: MDPI AG 2023-04-01
Series:Plants
Subjects:
Online Access:https://www.mdpi.com/2223-7747/12/9/1749
Description
Summary:Macrofossil evidence has demonstrated a first radiation of gnetophytes in the Early Cretaceous. However, the origin of the diversity of gnetophytes remains ambiguous because gnetalean macrofossils have rarely been reported from pre-Cretaceous strata. Here, we report a new putative gnetalean macrofossil reproductive shoot which possesses opposite phyllotaxy, long linear leaves more or less decurrent and having a prominent midvein and pedicled ovoid-ellipsoid and longitudinally striated chlamydosperms. Our new fossil is different from other known gnetalean macrofossils in the linear-lanceolate leaves with a midvein and pedicled chlamydosperms. As a result, we describe this new macrofossil reproductive shoot as new to science, i.e., <i>Daohugoucladus sinensis</i> gen. et sp. nov. Our new macrofossil displays additional morphological characters distinct from other known Mesozoic and modern gnetalean species and provides additional evidence of the origin and early evolution of female reproductive organs of gnetophytes.
ISSN:2223-7747