Structural data and spectra for: Micro-optics in the cuticle of matt-green Chrysina beetles create spatially-projected images
Data files
Oct 30, 2025 version files 1.06 MB
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README.md
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Table_S-01a.xlsx
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Table_S-01b.xlsx
12.18 KB
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Table_S-01c.xlsx
13.13 KB
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Table_S-02a.xlsx
241.94 KB
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Table_S-02b.xlsx
236.77 KB
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Table_S-03.xlsx
172.59 KB
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Table_S-04.xlsx
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Table_S-05.xlsx
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Abstract
Matt-green Chrysina beetles show left-handed circularly polarised light reflections produced by a helicoidal chitin-protein fibres structure. We provide tables for the Structural Pitch (a full 360 degrees turn) of the helicoid of C. chrysopedila, C. boucardi and C. bruyeai. These species have an exocuticle with small craters and rims that spread local specular reflections in many directions and show up under the microscope as a polygonal structure. We provide reflection spectra measured at different depths by using a microscope with a coupled variable-aperture spectrophotometer. Also, we provide circularly polarized spectra measured at the crater centres, off-centres at the slope, and at the rims separating the craters.
Dataset DOI: 10.5061/dryad.5mkkwh7gw
Description of the data and file structure
Structural data and spectra for three matt-green Chrysina beetles.
Files and variables
File: Table_S-01a.xlsx
Description: Chrysina chrysopedila bottom of crater Bouligand structural pitches measured using spherical mirror fit. Fig. 2
Variables
- chrysopedila depth, µm
- chrysopedila full pitch, µm
- chrysopedila full pitch Loess Residuals, µm span =0.7
- chrysopedila full pitch, µm Loess Fit span = 0.7
File: Table_S-01b.xlsx
Description: Chrysina boucardi bottom of crater Bouligand structural pitches measured using spherical mirror fit. Fig. 2
Variables
- boucardi depth, µm
- boucardi full pitch, µm
- boucardi full pitch, µm Loess Residuals span = 0.7
- boucardi full pitch Loess Fit, µm span = 0.7
- boucardi full pitch, µm Loess Residuals span = 0.5
- boucardi full pitch Loess Fit, µm span = 0.5
File: Table_S-01c.xlsx
Description: Chrysina bruyeai bottom of crater Bouligand structural pitches measured from centres of dark/bright bands, Fig. 2
Variables
- bruyeai depth, µm
- bruyeai full pitch, µm
- bruyeai full pitch, µm Loess Residuals span = 0.7
- bruyeai full pitch Loess Fit, µm span = 0.7
File: Table_S-02a.xlsx
Description: Chrysina chrysopedila non-polarized spectra (VIS) at different focusing depths in µm Fig 4
Variables
- Wavelength, nm
- chrysopedila +2.0 µm
- chrysopedila +1.5 µm
- chrysopedila +1.0 µm
- chrysopedila +0.5 µm
- chrysopedila 0.0 µm
- chrysopedila -0.5 µm
- chrysopedila -1.0 µm
- chrysopedila -1.5 µm
- chrysopedila -2.0 µm
- chrysopedila -2.5 µm
- chrysopedila -3.0 µm
- chrysopedila -4.0 µm
- chrysopedila -5.0 µm
- chrysopedila -6.0 µm
File: Table_S-02b.xlsx
Description: Chrysina boucardi non-polarized spectra at different focusing depths in µm Fig 4
Variables
- Wavelength, nm
- boucardi +2.0 µm
- boucardi +1.5 µm
- boucardi +1.0 µm
- boucardi +0.5 µm
- boucardi 0.0 µm
- boucardi -0.5 µm
- boucardi -1.0 µm
- boucardi -1.5 µm
- boucardi -2.0 µm
- boucardi -2.5 µm
- boucardi -3.0 µm
- boucardi -4.0 µm
- boucardi -5.0 µm
- boucardi -6.0 µm
File: Table_S-03.xlsx
Description: Chrysina chrysopedila cell polarized spectra: VIS (Non polarized), L (LHCP), R (RHCP) data for L and R used up to 800 nm in Fig. 6
Variables
- Wavelength, nm
- chrysopedila center L Reflectance, %
- chrysopedila center R Reflectance, %
- chrysopedila center VIS Reflectance, %
- chrysopedila rim L Reflectance, %
- chrysopedila rim R Reflectance, %
- chrysopedila rim VIS Reflectance, %
- chrysopedila slope L Reflectance, %
- chrysopedila slope R Reflectance, %
- chrysopedila slope VIS Reflectance, %
File: Table_S-04.xlsx
Description: Chrysina boucardi cell polarized spectra: VIS (Non polarized), L (LHCP), R (RHCP). Data for L and R used up to 800 nm in Fig. 6
Variables
- Wavelength, nm
- boucardi center L Reflectance, %
- boucardi center R Reflectance, %
- boucardi center VIS Reflectance, %
- boucardi rim L Reflectance, %
- boucardi rim R Reflectance, %
- boucardi rim VIS Reflectance, %
- boucardi slope L Reflectance, %
- boucardi slope R Reflectance, %
- boucardi slope VIS Reflectance, %
File: Table_S-05.xlsx
Description: Chrysina bruyeai cell polarized spectra: VIS (Non polarized), L (LHCP), R (RHCP). Data for L and R used up to 800 nm in Fig. 6
Variables
- Wavelength, nm
- bruyeai center L Reflectance, %
- bruyeai center R Reflectance, %
- bruyeai center VIS Reflectance, %
- bruyeai rim L Reflectance, %
- bruyeai rim R Reflectance, %
- bruyeai rim VIS Reflectance, %
- bruyeai slope L Reflectance, %
- bruyeai slope R Reflectance, %
- bruyeai slope VIS Reflectance, %
Other:
Blank Cells are noted as "null"