Abstract
Sea urchin's teeth from four families of order Echinoida and from orders Temnopleuroida, Arbacioida and Cidaroida were studied with synchrotron X-ray diffraction. The high and very high Mg calcite phases of the teeth, i.e. the first and second stage mineral constituents, respectively, have the same crystallographic orientations. The co-orientation of first and second stage mineral, which the authors attribute to epitaxy, extends across the phylogenic width of the extant regular sea urchins and demonstrates that this is a primitive character of this group. The range of compositions Δx for the two phases of Ca1-xMgxCO3 is about 0.20 or greater and is consistent with a common biomineralization process.
Original language | English (US) |
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Pages (from-to) | 48-52 |
Number of pages | 5 |
Journal | Connective tissue research |
Volume | 55 |
Issue number | SUPPL. 1 |
DOIs | |
State | Published - 2014 |
Keywords
- Biomineralization
- Calcite
- Sea urchin
- Synchrotron radiation
- Teeth
- X-ray diffraction
ASJC Scopus subject areas
- Rheumatology
- Biochemistry
- Orthopedics and Sports Medicine
- Molecular Biology
- Cell Biology