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Nanshanopteris nervosa
Nanshanopteris nervosa M. Wan, Jun Wang bis Rev. Palaeobot. Palynol., 219: 42. 3 Apr 2015
- Name
- Nanshanopteris nervosa
- Rank
- Species
- Generic Name
- [Genus] Nanshanopteris
- Authors (Pub.)
- Wan M.
Wang J.
- Publication
- Nanshanopteris nervosa gen. et sp. nov., a glenopterid foliage from the Changhsingian Sunan Formation in Yumen, western China [2015/4]
- Journal
- Review of Palaeobotany and Palynology
- Volume
- 219
- Page number
- 42
- Year
- 2015
- Fossil Status
- foliage
- Stratigraphy
- Changhsingian
- Strat. comment
- Sunan Formation
- Location
- Qingtoushan, Yumen City, Gansu Province, China
- Paleoregion
- Cathaysia (North)
Data for Holotypus
- Repository
- Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing, China
- Repository Number
- PB 21661; slides 21661-1-B, PB
21661-2-A, PB, 21661-2-A
Data for Paratypus
- Repository
- Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing, China
- Repository Number
- PB 21662; slides PB 21662-1-A,
21662-1-B
- Diagnosis
- Frond pinnate, monopodial, obcordate. Pinnules
suboppositely to oppositely attached to the rachis, auriculate to
lingulate with a broadly rounded apex, sometimes decurrent, entiremargined.
Rachis robust, longitudinally striated. Veination dense, most
veins entering the pinnule in the basiscopic part and then bifurcating
two to four times. Upper epidermis thicker than the lower one. Pinnules
amphistomatic. Stomatal apparatuses monocyclic to incomplete
dicyclic, occurring in the intercostal areas only. Stomatal pores and
guard cells deeply sunken. Papillae present on normal and subsidiary
cells of the lower pinnule surface. In the upper epidermis, papillae present
on subsidiary cells only. On both lower and upper epidermis papillae
of subsidiary cells usually overarching the stomatal pores.
