Figure 2. Diversity of litoptern and associated early SANU families expressed as the number of genera. A, pie chart expressing the relative diversity of each family. B, diversity over time of the different families of interest with colours corresponding to the families listed in (A). C, same as (B) but using a smoothing function that averages the different occurrences aiding the eye in seeing patterns. In (A) the number of genera for each family is indicated next to the name between brackets. In (C) the function geom_smooth from the R package ggplot v.3.4, method = loess and span = 0.5 was used. In (B) and (C) apart from the standard Periods, Epochs, and Ages below, the SALMAs are indicated in grey boxes crossing the plots. The Tiupampan and Peligran SALMAs and the Bonaerian and Lujanian SALMAs are taken as only two temporal units instead of four for the plots. The data on taxa and occurrences were taken from Supporting information, Table S1, and the temporal information on SALMAs were taken from Supporting information, File S6. Note that the two genera of 'amilnedwarsids' were not included in this plot. Note that in the Discussion section, we proposed to redefine the families Anisolambdidae and Sparnotheriodontidae as the subfamilies Anisolambdinae and Sparnotheriodontinae of the family Anisolambdidae. Abbreviations: Ba, Barrancan; Bo/Lu, Bonaerian and Lujanian; Cc, Colloncuran; Cd, Carodnia Zone; Ch, Chasicoan; Co, Colhuehuapian; Cp, Chapadmalalan; De, Deseadean; En, Ensenadan; Hu, Huayquerian; It, Itaboraian; La, Laventan; Ma, Marplatan; Mo, Montehermosan; Mu, Mustersan; Ri, Riochican; Sa, Sapoan; San, Santacrucian; Tg, Tinguirirican; Ti/Pe, Tiupampan and Peligran; Va, Vacan.

Published as part of Püschel, Hans P., Shelley, Sarah L., Williamson, Thomas E., Perini, Fernando A., Wible, John R. & Brusatte, Stephen L., 2024, A new dentition-based phylogeny of Litopterna (Mammalia: Placentalia) and 'archaic' South American ungulates, pp. 1-50 in Zoological Journal of the Linnean Society 202 (1) on page 8, DOI: 10.1093/zoolinnean/zlae095, http://zenodo.org/record/13774717