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Lilingostrobus chaloneri
Lilingostrobus chaloneri Gerrienne, Casc.-Miñana, Prestianni, Steem., C.-S. Li PloS One, 13(7(e0198287.)): 5. 11 Jul 2018
- Name
- Lilingostrobus chaloneri
- Rank
- Species
- Generic Name
- [Genus] Lilingostrobus
- Authors (Pub.)
- Gerrienne P.
Cascales-Miñana B.
Prestianni C.
Steemans P.
Li C.-S.
- Publication
- Lilingostrobus chaloneri gen. et sp. nov., a Late Devonian woody lycopsid from Hunan, China [2018/7]
- Journal
- PLoS One
- Volume
- 13
- Issue
- 7(e0198287.)
- Page number
- 5
- Year
- 2018
- Fossil Status
- leafy stems (with reproductive organs)
- Stratigraphy
- Famennian
- Strat. comment
- Xikuangshan Formation
- Location
- Wangxianqiao Reservoir, Liling County, Hunan Province, China
- Paleoregion
- Cathaysia (South)
Data for Holotypus
- Repository
- Institute of Botany, Chinese Academy of Sciences, Beijing, China
- Repository Number
- 0901
- Diagnosis
- Width of axis ranging from 1.5 mm to 5 mm. Leaf pseudowhorls 3±5 mm apart.
Vegetative leaves slightly decurrent, inserted at 45±90Ê on the axis. Leaf at least 30 mm long
and up to 1.7 mm wide. Leaf margin bearing trichome-like appendages, up to 1 mm long and
0.1 mm wide in their proximal part, 5±10 mm apart along the leaf margin. Primary xylem
strand 1.0 to 1.8 mm across, with 8±12 exarch protoxylem strands. Metaxylem cells rounded
in transverse section, 20±60 μm in diameter; presence of Williamson's striation. Protoxylem
cells 7±20 μm in diameter. Secondary xylem tracheids 30±50 μm in diameter. Rays possibly
more than 100 cells high, including approximately rectangular thin-walled, presumably parenchymatous,
cells, 20±50 μm high and 50±100 μm long. Tracheid/ray (cross-field) pitting consisting
of ca. 20 rounded to oval pits, 5±10 μm high and wide. Strobilus up to 56 mm long, and
up to 7 mm wide. Sporophylls up to 45 mm long and 1.0±1.6 mm wide, inserted on the strobilus
axis at 45±90Ê. Sporophyll pedicel approximately 2.0 to 3.5 mm long and 0.2±0.4 mm wide;
distal lamina up to 50 mm long. Trichome-like appendages borne on leaf margin, up to 0.5
mm long. Putative sporangia globose, 1±2 mm high and wide, possibly attached on a short
stalk inserted distally on the pedicel of the sporophyll. Microspore around 50 μm in diameter,
with subcircular amb. Trilete mark extending to the amb radius. Curvaturae possibly present.
A slightly prominent triangular area with concave sides is present at the proximal pole. In the
interradial and proximo-equatorial area, one specimen shows small parallel rugulae of 4±5 μm
thick and apart, and 20±30 μm length. Distal face smooth. Putative megaspores 300±350 μm in
diameter.
