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Xitunia spinitheca
Xitunia spinitheca J.-Z. Xue Acta Geol. Sin. (Engl. ed.), 83(3): 505. 10 Jun 2009
- Name
- Xitunia spinitheca
- Rank
- Species
- Generic Name
- [Genus] Xitunia
- Authors (Pub.)
- Xue J.-Z.
- Publication
- Two zosterophyll plants from the Lower Devonian (Lochkovian) Xitun Formation of Northeastern Yunnan, China [2009/6]
- Journal
- Acta Geologica Sinica
- Volume
- 83
- Issue
- 3
- Page number
- 505
- Year
- 2009
- Fossil Status
- stems (with sporangia)
- Stratigraphy
- Lochkovian
- Location
- Quarry at Huaguo Hill of Shengfeng district of Qujing city, Yunnan Province, China
- Paleoregion
- China (South)
Data for Holotypus
- Repository
- Beijing University, Department of Geology, Beijing, China
- Repository Number
- PKU-XH200a
- Diagnosis
- Fertile regions, at least 21 mm long and 9.6-11.2 mm wide. Adaxial valve of
sporangia, 2.6-3.0 mm wide and 2.9-3.3 mm high; abaxial valve, 5.0-5.2 mm high and 4.1-4.8 mm wide at the distal portion (exclusive of distal sterile appendages). Appendages, spiny-shaped in face view, flattened, 1.7-5.3
mm long, with a base being 0.55-1.31 mm wide, decreasing in width to the pointed end, unforked or dichotomous once to twice. Each sporangium attached by a stalk at an acute angle to the axis. Stalks, 2.2-2.6 mm long
and 0.8-1.0 mm wide.
