The ceram.s data frame has 15 rows and 634 columns. Columns are presence/absence values of 634 species. The variable names are formed from the scientific names. The case names are standard country abbreviations, excepting SS (Serbia) and CBH (Croatia and Bosnia-Herzegovina).
data(ceram.s)Danilevsky, M. L. 2007. A check-list of Longicorn Beetles (Coleoptera, Cerambycoidea) of Europe.Available at http://www.cerambycidae.net/
Baselga, A. 2008. Determinants of species richness, endemism and turnover in European longhorn beetles. Ecography 31:263-271