Detail of Gaudryceras_normal

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Project
Title
X-ray micro-computed tomography (CT) images of the septal structure of ammonite
Description
NA
Release, Updated
2017-10-03,
2017-11-15
License
CC BY
Kind
Image data based on Experiment
File Formats
Data size
1.1 GB

Organism
D. cf. damesi (NA)
Strain(s)
-
Cell Line
-

Datatype
strucure
Molecular Function (MF)
Biological Process (BP)
-
Cellular Component (CC)
-
Biological Imaging Method
XYZ Scale
XY: 27.705 micrometer/pixel, Z: 27.705 micrometer/pixel
T scale
-

Image Acquisition
Experiment type
Other
Microscope type
Other
Acquisition mode
Other
Contrast method
Other
Microscope model
-
Detector model
-
Objective model
-
Filter set
-

Summary of Methods
See details in Inoue and Kondo (2016) Scientific Reports, 6, 33689.
Related paper(s)

Shinya Inoue, Shigeru Kondo (2016) Suture pattern formation in ammonites and the unknown rear mantle structure., Scientific reports, Volume 6, pp. 33689

Published in 2016 Sep 19 (Electronic publication in Sept. 19, 2016, midnight )

(Abstract) Ammonite shells have complex patterns of suture lines that vary across species. The lines are formed at the intersection of the outer shell wall and the septa. The wavy septa can form if the rear mantle of the ammonite, which functions as the template, has a complex shape. Previous hypotheses assumed that the rear mantle is like a flexible membrane that can be folded by some physical force. The elucidation of the mechanism of septa formation requires that the detailed shape of the septa should be known. We developed a new protocol of X-ray micro-computed tomography (CT) and obtained high-resolution three-dimensional (3D) images of the septa of the Upper Cretaceous ammonite Damesites cf. damesi. The obtained image suggested that the wavy and branched structures of the rear mantle grew autonomously. We found that some extant sea slugs have branched structures and showed similar shape and growth sequence as those in fossils, suggesting that the mantle of molluscs basically has the potential to form branched projections. Based on the characteristics of the obtained 3D structure, we explain how ammonites might have formed the complex suture patterns.

Contact
Shigeru Kondo , Osaka University , Graduate School of Frontier Bioscience , Laboratory of Pattern Formation
Contributors
Shinya Inoue, Shigeru Kondo

OMERO Dataset
OMERO Project
Source