Figure 16 from: Van Waveren IM (2019) A morphometric analysis of Tobleria bicuspis, a Voltziales seed cone from the early Permian Jambi palaeoflora, Sumatra (Indonesia). PhytoKeys 119: 67-95. https://doi.org/10.3897/phytokeys.119.29555

Figure 16 Absence of fluorescence in a scale from the Cone C1 from 45311 Aa: A scale under normal light showing the scale as being slightly darker than the rock B identical scale with fluorescent light showing the scale as being opaque while the rock around it shows some fluorescence (arrows indicate the scale).