Interrelationships between evolutionary (historical) and ecological (present-day) factors, defining the conditions of trogloxenes versus troglophiles versus troglobites for subterranean organisms.

  Part of: Trajano E, Carvalho MR (2017) Towards a biologically meaningful classification of subterranean organisms: a critical analysis of the Schiner-Racovitza system from a historical perspective, difficulties of its application and implications for conservation. Subterranean Biology 22: 1-26.