Figure 7 from: Pyle RL (2016) Towards a Global Names Architecture: The future of indexing scientific names. In: Michel E (Ed.) Anchoring Biodiversity Information: From Sherborn to the 21st century and beyond. ZooKeys 550: 261–281. https://doi.org/10.3897/zookeys.550.10009

Figure 7 - At the start of modern zoological nomenclature, Linnaeus' tenth edition of Systema Naturae contained almost 4,400 species-group names (left). By 1850, the number of species names for animals had reached nearly 430,000 – an increase of two orders of magnitude.