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Myrmecological News myrmecologicalnews.org Myrmecol. News 30 Digital supplementary material Digital supplementary material to YELA, N.I., CALCATERRA, L.A. & ARANDA-RICKERT, A. 2020: Coping with temperature extremes: thermal tolerance and behavioral plasticity in desert leaf-cutting ants (Hymenoptera: Formicidae) across an altitudinal gradient. – Myrmecological News 30: 139-150. The content of this digital supplementary material was subject to the same scientific editorial processing as the article it accompanies. However, the authors are responsible for copyediting and layout. Figure S1. Critical thermal tolerance maximum and minimum by elevation for Acromyrmex lobicornis and A. striatus. Each point (open circle) is the critical temperature measured for a single individual ant, for a total of 30 individuals of each species for each elevation. (A) CTmax of A. lobicornis. (B) CTmax of A. striatus (C) CTmin of A. lobicornis. (D) CTmin of A. striatus. 1 Supplementary Material Table 1. Parameter estimates of the best fitting Generalized Linear Models analyzing the influence of ant size and elevation on the critical thermal maximum (A) and the critical thermal minimum (B) of each LCA species. Successful models were selected through comparisons of AICc values. Significant effects are highlighted bold. A) CTmax Predictive variables Estimate SE z p Acromyrmex lobicornis Elevation -0.0006 0.0005 -1.127 0.276 Acromyrmex striatus Elevation -0.0001 0.0003 -0.487 0.632 B) CTmin Predictive variable Estimate SE z p Acromyrmex lobicornis Ant size -0.094 0.366 -0.257 0.801 Acromyrmex striatus Elevation 0.002 0.0007 3.418 <0.01 Ant size 0.688 0.507 1.357 0.190 2 Figure S2. Nest structure and fungus chamber of the two LCAs species. A) Acromyrmex. lobicornis nest with mound located beneath a shrub; B) A. striatus nest located on bare soil; C) Fungus chamber of A. lobicornis; and D, E) Fungus chambers of A. striatus. Approximate scale bars: (A, B and C) 20 cm; (D) 10 cm; (E) 1 cm. Arrows show nest entrances (A, B), fungus chambers (D) and fungus inside the chamber (C, E). 3 .

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Karyotype and Putative Chromosomal
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