Supplement 1. Complete insect damage data set from the nine Paleocene–Eocene Bighorn Basin sites described in this paper.

<h2>File List</h2><blockquote> <p><a href="data.txt">data.txt</a></p> </blockquote><h2>Description</h2><blockquote> <blockquote> <p>The complete insect damage data set shown as a list of every identifiable dicot leaf, its size, and the damage types on it.</p> <p>Column definitions:</p> <blockquote> <p>Site: Bighorn fossil plant sites. P = Paleocene, E = Eocene. Site numbers within the Paleocene and Eocene are chronologic, from oldest to youngest.</p> <p>USNM Locality Number: Formal locality number assigned by the National Museum of Natural History, Smithsonian Institution. Sites E2, E3, and E5 consist of multiple localities at the same (or very nearly the same) stratigraphic level, and so each locality was given its own USNM locality number.</p> <p>Collector's Locality Number: Informal, preliminary locality number assigned in the field. EDC = Ellen Currano, SW = Scott Wing, PW = Peter Wilf. LB and DC1 were both collected by Scott Wing. Collections were made at some USNM localities during multiple years; therefore, the fossils collected from different years have different collector's locality numbers, which were written on the specimens.</p> <p>Field Collection Number: Specimen number assigned during field censuses. Specimens with census numbers were collected and are housed in the Department of Paleobiology, National Museum of Natural History, Smithsonian Institution. Those listed as "C" were tallied on the outcrop.</p> <p>Plant species: Full descriptions and photographs of the plant species and morphotypes are available in <a href="appendix-B.htm">Appendix B</a>.</p> <p>Size: Laminar size, as defined by Webb (1959): lepto = leptophyll, nano = nanophyll, micro = microphyll, noto = notophyll, meso = mesophyll, macro = macrophyll, mega = megaphyll, frag = fragment.</p> <p>DT: Insect damage morphotypes (DTs) observed on each fossil. P1 and P2 were scored for the presence or absence of each damage type (Wilf et al. 2006). For the other seven sites, the number of occurrences of each DT was recorded and is given in parentheses after the DT. For example, 4(2) means that there are two occurrences of DT 4 on the leaf. Piercing and sucking was scored for presence / absence because of the abundance of occurrences of piercing and sucking scars on individual leaves.</p> </blockquote> </blockquote> </blockquote>