X-ray microtomography of 410 million-year-old optic capsules from placoderm fishes

Burrow, Carole J., Jones, Allan S. and Young, Gavin C. (2005) X-ray microtomography of 410 million-year-old optic capsules from placoderm fishes. Micron, 36 6: 551-557.


Author Burrow, Carole J.
Jones, Allan S.
Young, Gavin C.
Title X-ray microtomography of 410 million-year-old optic capsules from placoderm fishes
Journal name Micron   Check publisher's open access policy
ISSN 0968-4328
Publication date 2005-08
Sub-type Article (original research)
DOI 10.1016/j.micron.2005.05.005
Volume 36
Issue 6
Start page 551
End page 557
Total pages 7
Editor B.K. Jap
D.J. Cockayne
J.R. Harris
R.F. Egerton
Place of publication UK
Publisher Elsevier
Collection year 2005
Language eng
Subject C1
270503 Animal Anatomy and Histology
671401 Scientific instrumentation
Abstract The structure of two small ossified optic capsules from mid-Palaeozoic placoderm fishes has been revealed in fine detail, by the use of Xray microtomography analysis and 3D visualisation software. These two specimens are 410 million-year-old; they were collected from an Early Devonian (Lochkovian) limestone in central New South Wales, and are the oldest known optic capsules from jawed fishes. The capsules show attachment areas for seven extrinsic eye muscles, rather than the six until recently deemed universal for gnathostomes. The analysis also revealed structures within the ossified cartilage which covered the medial surface of the eyeball, including nerve tracts, vascular canals, and possibly a choroid rete mirabile. (c) 2005 Elsevier Ltd. All rights reserved.
Keyword Microscopy
3d Visualisation
X-ray Microtomography
Micro-ct
Placodermi
Devonian Period
Optic Capsule
Early Vertebrate Eye
Tomography
Fossil
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2006 Higher Education Research Data Collection
School of Agriculture and Food Sciences
School of Biological Sciences Publications
 
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