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Trapa chengsenii
Trapa chengsenii Wójcicki, S.-Y. Song, Y.-F. Wang Acta Palaeobot., 39(1): 7. 1999
- Name
- Trapa chengsenii
- Rank
- Species
- Generic Name
- [Genus] Trapa
- Authors (Pub.)
- Wójcicki J. J.
Song S.-Y.
Wang Y.-F.
- Publication
- Fossil Trapa L. of China. 1. A new locality from the Miocene of the Liang He Coal Mine, West Yunnan [1999]
- Journal
- Acta Palaeobotanica
- Volume
- 39
- Issue
- 1
- Page number
- 7
- Year
- 1999
- Fossil Status
- fruits
- Stratigraphy
- Miocene
- Strat. comment
- Mengwang Formation
- Location
- Liang He brown coal open-cast mine, Yunnan province, China
- Paleoregion
- Eurasia (China)
Data for Holotypus
- Repository
- National Museum of Plant History of China, Institute of Botany, Beijing, China
- Repository Number
- coll. S. Song, C. S. Li, Y. & S. J. Wang & L. Q. Chen 1998, CBP-LH98-la
- Diagnosis
- Fruits of medium size, with two massive extended horns triangular in outline; length of fruit 15- 25 mm (including neck), width of fruit at the surface of the upper horns 22-38 mm, length/width ratio of fruit 0.55-0.70; upper surface of fruit depressed with a well developed neck, both finely ribbed; height of neck 2-4 mm, width 3-5 mm; the neck usually does not protrude from the upper horns; apical aperture up to ca 5 mm, rounded, a ring of upward pointing hairs closing the apical aperture usually visible; corona lacking; upper horns 7- 13 mm long, usually upward pointing (inclination 50°-60°), rarely patent, narrowly triangular in outline, probably at least slightly subulate bearing damaged or sometime± complete thin spines up to at least ca 8 mm long with retrorse barbs (harpoons), horns with well developed transversal callosity at the base; the presence of mat areas excluded; lower horns reduced to solid tubercles, rounded or truncate, sometime probably slightly depressed, 3- 5 mm long, mostly downward pointing, probably with small cavity at the base, located usually asymmetrically slightly above the middle of body of the fruit or/and in ca 1/3 from its base; between the upper and lower horns are present well developed, solid, truncate or rounded tubercles, 2-4 mm long; lower part of the body of the fruit obtriangular in outline, its surface covered with a few protruding longitudinal ribs; base of the fruit gradually narrows, sometime rounded; basal ring relatively small, in most cases not visible; scar small, usually ca 1.0-1.5 mm in diameter.
