Record details

    The taxonomic method and the Permian mass extinction
Statement of responsibility
    Jiří Kolibáč
    Kolibáč, Jiří
Source title - serial
    Acta Musei Moraviae, Scientiae naturales (Časopis Moravského muzea, Vědy přírodní)
    Vol. 81, no. 1-2
    p. 419-423
    4 obr., 2 tab., 5 bibl.
    Zkr. název ser.: Acta Mus. Morav., Sci. natur. (Čas. Morav. Muz., Vědy přír.)
Subject group
    analýza statistická
    vymírání masové
Abstract (in english)
   One of the method of calculating the number of species that became extinct during the catastrophe at the turn of the Permian and the Triassic (the so-called Permian mass extinction) is based on a model of the accidental extinction of species (the so-called "infantryman in the battlefield" scenario). The number of extinct species is read from a rarefaction curve, and its based on the knowledge of the number of extinct higher taxa. The slape of the rarefaction curve, depends upon the distribution of species in genera, or of lower taxa in higher ones. This distribution has been previously thought to be highly asymmetrical. The ppresent contribution describes an experiment which shows that using the methods of phylogenetical taxonomy, together with increased knowledge of the classifiied organisms, will increase the symmetry of the system. This changed distribution is reflected in the shape of the rarefaction curve.
   Some of the estimates based on the rarefaction curve for the extinct families of marine organisms indicate that 96% of species became extinct during the Permian catastrophe. By extrapolating data obtained from a reclassification of Hydnocerinae (Coleoptera: Cleridae), the rarefaction curve mentioned can be modified so as to decrease the estimated number of extinct species to 87%
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
Entered date
    13. 2. 2008
Import date
    8. 8. 2012