| P number: | P521169 |
|---|---|
| Caption: | A fossil specimen of Didymograptus (s.l.) superstes. A fossil graptolite. (Graptolithina.) Pulnabrick Burn, Kirkcudbrightshire, Scotland. |
| Description: | This specimen of Didymograptus (s.l.) superstes is from the Ordovician gracilis Biozone and was found at Pulnabrick Burn. British Geological Survey Biostratigraphy Collection number GSE 14995. Didymograptus is a graptolite with a uniserial rhabdosome and two stipes with a single row of simple straight thecae. It is a pendant form, the stipes hang down from the sicula. The earliest graptolites, the dendroids first evolved in the Cambrian and lived rooted to the sea bed. Later graptolites became free-floating and planktonic and developed a range of hydrodynamic strategies to remain buoyant and avoid sinking to the sea floor. Fig. Mem.for Geology of Carrick and Doon Sheets 8W/8E, fig. 5p. |
| Date taken: | Wed Jan 01 00:00:00 GMT 2003 |
| Photographer: | Unknown |
| Copyright statement: | NERC |
| Orientation: | Landscape |
| Size: | 367.47 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: | Unsorted Images |
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