| P number: | P521063 |
|---|---|
| Caption: | A fossil specimen of Rhacopteris geikiei Kidston. A fossil plant. (Plantae.) River Esk, Glencartholm, Langholm, Dumfriesshire, Scotland. |
| Description: | This specimen of Rhacopteris is from the Carboniferous Calciferous Sandstone Series from the River Esk at Glencartholm. British Geological Survey Biostratigraphy Collection number GSE 5598. Holotype. Rhacopteris is a form-genus with large wedge-shaped leaflets with large numbers of veins radiating from the base of each. It was very common in the Carboniferous flora. A form-genus is a unit in taxonomy especially used for plants that are only part of the whole individual and that usually occur widely separated from other parts e.g. leaves , stems, roots or seeds. The genus will have grouped into it several similar forms but they will lack a common ancestry. Figd. as Sphenopteris geikiei, R. Kidston, Foss. Plants. Eskdale & Liddlesdale. T.R.S.E. vol. 30, pt. II, 1881 -2, Pl. XXX, fig. 5, & (as before) Foss. Plants. Carb. Rocks. G. Brit. Mem. Geol. Surv. 1923-5, pt. III, p. 218, fig. 11. |
| Date taken: | Wed Jan 01 00:00:00 GMT 2003 |
| Photographer: | Unknown |
| Copyright statement: | NERC |
| Orientation: | Landscape |
| Size: | 202.76 KB; 1000 x 665 pixels; 85 x 56 mm (print at 300 DPI); 265 x 176 mm (screen at 96 DPI); |
| Average Rating: | Not yet rated |
| Categories: | Best of BGS Images/ Fossils |
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