PNAS

Mass extinction in poorly known taxa [Ecology]

C. Regnier, G. Achaz, A. Lambert, R. H. Cowie, P. Bouchet, B. Fontaine.
Since the 1980s, many have suggested we are in the midst of a massive extinction crisis, yet only 799 (0.04%) of the 1.9 million known recent species are recorded as extinct, questioning the reality of the crisis. This low figure is due to the fact that the status of very...