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chronospeciesChronospezies (ger.)

  • The temporal sequence of individuals belonging to the same species, esp. in different geological layers.

    Chronospecies Palaeontological species may logically incorporate the time-element in their definition, and where the intergrading variants in a successive series of evolving populations occur in a relatively complete fossil record preserved in a continuously deposited and lithologically uniform rock succession, chonological species may theoretically be erected to cover statistically defined segments of lineages.

    Thomas, G. (1956). The species conflict – abstractions and their applicability. In: Sylvester-Bradley, P.C. (ed.). The Species Concept in Paleontology, 17-31: 24. 


    The chronospecies is a lineage-taxon, by definition having extension in time. In its nature it must therefore incorporate all the individuals of the lineage-segment spanning the defined time-interval, however they may be spatially distributed or whatever form they may possess.

    George, T.N. (1956). Biospecies, chronospecies and morphospecies. In: Sylvester-Bradley, P.C. (ed.). The Species Concept in Paleontology, 123-137: 129.


    forgetting the paleontological weakness for homonyms, we are left with the following terms for the exclusive use of defining species: biospecies, chronospecies, morphospecies, and holo- morphospecies. I assume you can use any of these depending upon your personal temperament.

    Nitecki, M.H. (1957). What is a paleontological species? Evolution 11, 378-380: 380.


    chronospecies 1: A species which is represented in more than one geological time horizon. 2: The successive species replacing each other in a phyletic lineage which are given ancestor and descendant status according to the geological time sequence; palaeospecies.    

    Lincoln, R.J., Boxshall, G.A. & Clark, P.F. (1982). A Dictionary of Ecology, Evolution and Systematics: 47.