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Uploaded on:
11/03/2009 03:15:24
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P number: P521130
Caption: A fossil specimen of Cephalaspis lyelli Agassiz. A fossil fish. (Vertebrata, Pisces.) Glammis, Perthshire, Scotland.
Description: Cephalaspis lyelli is a jawless fish; a member of the Ostracoderms which were armoured with bony plates and scales. British Geological Survey Biostratigraphy Collection number GSM 5107. Cast of Lectotype. They occurred mainly in fresh and brackish water and were most abundant in the Lower Old Red Sandstone Devonian. Cephalaspis is one of the best known ostracoderms with the head covered by a rigid bony shield and the rest of the body by elongated scales. A pair of fins lie just behind the head shield which has the depressed shape of a bottom dweller. Cephalaspis is thought to have lived in fresh-water pools or streams feeding on organic material filtered in the gill pouches from bottom sediments. Figd. Agassig, Rech, Poiss. Foss. 2. 1838, pl. 1, fig.2, and Lankester, Mon. Pal. Soc. 1868, O.R.S. Fishes. Pl. VIII, fig. 1, & Stensio, Ceph. Great Britain 1932 B.M.(N.H.) pub. Text fig. 40, p.121. Cited Lankester, as before, p 44, and Stensio as before .
Date taken: 01/01/2003
Photographer: Unknown
Copyright statement: NERC
Orientation: Landscape
Size: 153.01 KB; 1000 x 665 pixels; 85 x 56 mm (print at 300 DPI); 265 x 176 mm (screen at 96 DPI);
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Categories: Best of BGS Images/ Fossils  

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