To cite package 'Claddis' in a publication use:

Lloyd, Graeme T. (2016). Estimating morphological diversity and tempo with discrete character-taxon matrices: implementation, challenges, progress, and future directions. Biological Journal of the Linnean Society, 118, 131-151.

As Claddis is evolving rapidly, you may want to also cite its version number (found with 'library(help = Claddis)').

Corresponding BibTeX entry:

  @Article{,
    title = {Estimating morphological diversity and tempo with discrete
      character-taxon matrices: implementation, challenges, progress,
      and future directions. Biological Journal of the Linnean
      Society},
    author = {G. T. Lloyd},
    journal = {Biological Journal of the Linnean Society},
    year = {2016},
    volume = {118},
    pages = {131-151.},
  }