Figure 4.

The Geochronological Ranges of Mesozoic Insect Taxa Exhibiting Direct Evidence of Pollination

Geometric figures indicate the taxonomic affiliations of the pollen types found in each example. Superscript numbers: 1 (Labandeira et al., 2016); 2 (Labandeira, 2005); 3 (Lin et al., 2019); 4 (Peñalver et al., 2012); 5 (Peñalver et al., 2015); 6 (Peris et al., 2017); 7 (Cai et al., 2018); 8 (Huang et al., 2016); 9 (Bao et al., 2019); 10 (Grimaldi et al., 2019). The different colors in the background illustrate the gymnosperm/angiosperm origin of the pollen grains found. Kateretidae is located in the transition between both group of plants as some samples were found associated with gymnosperms and also one sample with angiosperms.