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

Carole J. Burrow; Allan S. Jones; Gavin C. Young

doi:10.1016/j.micron.2005.05.005

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

Carole J. Burrow, Allan S. Jones^*, Gavin C. Young

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

24 Citations (Scopus)

Abstract

The structure of two small ossified optic capsules from mid-Palaeozoic placoderm fishes has been revealed in fine detail, by the use of X-ray 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.

Original language	English
Pages (from-to)	551-557
Number of pages	7
Journal	Micron
Volume	36
Issue number	6
DOIs	https://doi.org/10.1016/j.micron.2005.05.005
Publication status	Published - Aug 2005

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10.1016/j.micron.2005.05.005

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title = "X-ray microtomography of 410 million-year-old optic capsules from placoderm fishes",

abstract = "The structure of two small ossified optic capsules from mid-Palaeozoic placoderm fishes has been revealed in fine detail, by the use of X-ray 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.",

keywords = "3D visualisation, Devonian period, Early vertebrate eye, Micro-CT, Optic capsule, Placodermi, X-ray microtomography",

author = "Burrow, {Carole J.} and Jones, {Allan S.} and Young, {Gavin C.}",

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T1 - X-ray microtomography of 410 million-year-old optic capsules from placoderm fishes

AU - Burrow, Carole J.

AU - Jones, Allan S.

AU - Young, Gavin C.

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N2 - The structure of two small ossified optic capsules from mid-Palaeozoic placoderm fishes has been revealed in fine detail, by the use of X-ray 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.

AB - The structure of two small ossified optic capsules from mid-Palaeozoic placoderm fishes has been revealed in fine detail, by the use of X-ray 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.

KW - 3D visualisation

KW - Devonian period

KW - Early vertebrate eye

KW - Micro-CT

KW - Optic capsule

KW - Placodermi

KW - X-ray microtomography

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U2 - 10.1016/j.micron.2005.05.005

DO - 10.1016/j.micron.2005.05.005

M3 - Article

SN - 0968-4328

VL - 36

SP - 551

EP - 557

JO - Micron

JF - Micron

IS - 6

ER -

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

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