Back
Denglongia hubeiensis
Denglongia hubeiensis J.-Z. Xue, S.-G. Hao Int. J. Pl. Sci., 169(9): 1315. Dec 2008
- Name
- Denglongia hubeiensis
- Rank
- Species
- Generic Name
- [Genus] Denglongia
- Authors (Pub.)
- Xue J.-Z.
Hao S.-G.
- Publication
- Denglongia hubeiensis gen. et sp. nov., a new plant attributed to Cladoxylopsida from the Upper Devonian (Frasnian) of South China [2008/12]
- Journal
- International Journal of Plant Sciences
- Volume
- 169
- Issue
- 9
- Page number
- 1315
- Year
- 2008
- Fossil Status
- stems (with sporangia)
- Stratigraphy
- Frasnian
- Strat. comment
- Huangjiadeng Formation
- Location
- South side of Luoyan Hill, 20 km southwest of Changyang County, Hubei Province, China
- Paleoregion
- Cathaysia (South)
Data for Holotypus
- Repository
- Beijing University, Department of Geology, Beijing, China
- Repository Number
- PKU-XH120
- Diagnosis
- Main axes 3–7 mm wide and at least 340 mm long, with internodes up to 190 mm long. First-order branches 1.5–3.0 mm wide and at least 290 mm long, with internodes 40–60 mm in length. Second-order branches, on average, 1.0 mm wide and at least 30 mm long, arranged in a whorled pattern. Sterile ultimate appendages inserted at right angles on axes, 6–22 mm in overall length. Fertile structures 8–16 mm wide at the widest position and 6.0–6.5 mm high, with a stalk 4.0 mm long and 0.4–0.6 mm wide; stalk divides once to form an initial dichotomy, each resulting branch bearing three or four alternate lateral branches in a pinnate pattern. Each lateral branch dichotomizes more than four times at an angle of ;35–65, with penultimate and ultimate divisions toward inside of fertile structure. Sporangia 1.4–2.0 mm long, 0.3–0.4 mm wide. Spores anisosporous, circular or oval, in two size classes: 22–30 and 40–55 mm in diameter; larger spores with thin, smooth, wrinkled exine and rays of trilete mark weakly developed and extending over one-half of spore radius.
