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Sinocycadoxylon lianum
Sinocycadoxylon lianum W. Zhang, X.-J. Yang in W. Zhang, X.-J. Yang, X.-P. Fu, S.-L. Zheng, Y.-D. Wang Rev. Palaeobot. Palynol., 183: 52. 15 Jul 2012
- Name
- Sinocycadoxylon lianum
- Rank
- Species
- Original spelling
- liianum
- Generic Name
- [Genus] Sinocycadoxylon
- Authors (Name)
- Zhang W.
Yang X.-J.
- Authors (Pub.)
- Zhang W.
Yang X.-J.
Fu X.-P.
Zheng S.-L.
Wang Y.-D.
- Publication
- A polyxylic cycad trunk from the Middle Jurassic of western Liaoning, China, and its evolutionary implications [2012/7]
- Journal
- Review of Palaeobotany and Palynology
- Volume
- 183
- Page number
- 52
- Year
- 2012
- Fossil Status
- stems (wood)
- Stratigraphy
- Middle Jurassic
- Strat. comment
- Taizishan Bed of the Tiaojishan Formation
- Location
- Changgao, Beipiao City, Liaoning Province, China
- Paleoregion
- Eurasia (China)
Data for Holotypus
- Repository
- Chaoyang Jizantang Fossil Wood Museum, Chaoyang City, China
- Repository Number
- Specimen No. PB21393 (L-007)
- Diagnosis
- Polyxylic stem with a small parenchymatous pith, with
mucilage canals, transfusion cells and medullary vascular bundles. The
cylindrical vascular system with concentric rings of centrifugal secondary
xylem and phloem toward the outside, and a centripetal vascular
ring. Secondary xylem with distinct growth rings. The centripetal
vascular ring and the first centrifugal one divided into eight vascular
segments, separated by parenchymatous zones. Pits on radial walls of
secondary xylem tracheids araucaroid, cross-field with one or more
pits. Secondary rays uniseriate or multiseriate and up to 750 μm wide
with mucilage canals and transfusion cells. Phloem consisting of parenchyma
cells and sieve cells.
