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Dibracophyton acrovatum
Dibracophyton acrovatum S.-G. Hao, J.-Z. Xue, X. Zhu, De-M. Wang Rev. Palaeobot. Palynol., 171: 74. 1 Feb 2012
- Name
- Dibracophyton acrovatum
- Rank
- Species
- Generic Name
- [Genus] Dibracophyton
- Authors (Pub.)
- Hao S.-G.
Xue J.-Z.
Zhu X.
Wang D.-M.
- Publication
- A new genus of Early Devonian plants with novel strobilar structures and vegetative appendages from the Posongchong Formation of Yunnan, China [2012/2]
- Journal
- Review of Palaeobotany and Palynology
- Volume
- 171
- Page number
- 74
- Year
- 2012
- Fossil Status
- stems (with sporangia)
- Stratigraphy
- Pragian
- Strat. comment
- Posongchong Formation
- Location
- Zhichang village, Wenshan District, Yunnan Province, China
- Paleoregion
- Cathaysia (South)
Data for Holotypus
- Repository
- Beijing University, Department of Geology, Beijing, China
- Repository Number
- PKU-Zh. Di-01
- Diagnosis
- Characters as for the genus. Basal axes creeping, thicker than the vegetative and fertile axes which arise at a nearly vertical angle. Vegetative axes branching dichotomously at angles ca. 40°; lateral appendages up to at least 16 mm long, departing at angles of 60°–90° from the vegetative axes at irregular intervals; lateral appendages not planated, once to thrice divided at angles of 70°–90°. A few lateral appendages, distributed on lower regions of fertile axes. Strobili, long-cylindrical in shape, up to 83 mm in length. Fertile units, ca. 6.7 mm long and ca. 2.8 mm wide, variable in shape, equal to the length of the bracts and equal to the width of sporangia when bracts are thinner than sporangia; fertile units loosely or moderately spaced at basal parts of strobili and densely spaced in the distal parts. Lower bracts long-ovate and distal bracts linear, folding inward to cover the sporangium. Sporangia long-elliptical, ca. 4.6 mm long and ca. 2.8 mm wide, with short stalks.
