Eretmophyllum neimengguensis Yun F.Li et C.L.Sun in Li, Sun, Wang, Dilcher, Tan, Li & Na
Plant Fossil Names Registry Number: PFN000632
Act LSID: urn:lsid:plantfossilnames.org:act:632
Reference: Li, Y. F., Sun, C. L., Wang, H., Dilcher, D. L., Tan, X., Li, T. & Na, Y. L. (2018): First record of Eretmophyllum (Ginkgoales) with well-preserved cuticle from the Middle Jurassic of the Ordos Basin, Inner Mongolia, China. – Palaeoworld 27: 188–201.
Page of description: 191
Illustrations or figures: figs 4–7
Holotype RCPS-MSJY062, Research Center of Paleontology and Stratigraphy, Jilin University, Changchun, China
Figures: fig. 4a
Note: paratypes: RCPS-MSJY081, RCPS-MSJY040, RCPS-MSJY071 (fig. 4b, c, d)
Leaf simple, large, coriaceous, entire-margined, oblong to oblanceolate, tapering gradually at the base to a shortand thick cuneate petiole; apex retuse, rounded or sometimes asymmetrical. Two veins present at the base, dichotomously branching several times in narrow angles; veins in the middle portion of the leaf parallel, then converging toward the apex. Resin bodies absent. Leaf amphistomatic. Both the upper and lower epidermis comprising alternating stomatal and non-stomatal bands; lower epidermis possessing wider non-stomatal bands and higher sto-matal density. Stomata complex haplocheilic, monocyclic or incompletely dicyclic; guard cells sunken, surrounded by four to six subsidiary cells. Free and undeveloped papillae present on subsidiary cells. Stomatal apertures randomly oriented.
The specific epithet neimengguensis refers to theoccurrence of this species in Inner Mongolia, China.
Jurassic, Middle Jurassic
The lower member of the Middle JurassicYan’an Formation.
Manshijinyang Coal Mine, Ordos Basin, Inner Mongolia.
Plant fossil remain
macro- and meso-fossils-embryophytes except wood