Podrobnosti záznamu

Název
    Ontogenetic and intraspecific variation in the late Emsian - Eifelian (Devonian) conodonts Polygnathus serotinus and P. bultyncki in the Prague Basin (Czech Republic) and Nevada (western U.S.)
Autor
    Klapper, Gilbert
    Vodrážková, Stanislava
Jazyk
    anglicky
Typ dokumentu
    článek v periodiku
Zdrojový dokument - seriál
    Acta Geologica Polonica
Svazek/č.
    Roč. 63, č. 2
Strany
    22
Rok
    2013
Výraz tezauru
    Devonian, Emsian-Eifelian conodont zonation, Ontogenetic and intraspecific Variation, Taxonomic revision.
Klíčové slovo
    Basin
    Bultyncki
    Conodonts
    Czech
    Devonian
    Eifelian
    Emsian
    Intraspecific
    Late
    Nevada
    Ontogenetic
    Polygnathus
    Prague
    Republic
    Serotinus
    U.S
    Variation
    Western
Abstrakt (anglicky)
   Samples from populations of Polygnathus serotinus Telford 1975 and P. bultyncki Weddige 1977 from the Prague Basin and Nevada display normal variation for Devonian conodont species. A considerable number of previous authors, however, have proposed unnecessary synonyms of these two species, primarily because they have not recognized ontogenetic variation. In contrast, we interpret the variation as ontogenetic as well as intraspecific and present detailed synonymies as a result. A third species, P. praetrigonicus Bardashev 1992, which has been carried in open nomenclature for many years, is an important indicator of the basal costatus Zone in the Prague Basin, New York, and Nevada. We review the stratigraphic distribution of these three species and the conodont zonation across the Emsian-Eifelian (Lower-Middle Devonian) boundary. Polygnathus pseudocostatus sp. nov. (partitus-costatus zones, central Nevada) is described herein. We have observed a decrease in the pit size during ontogeny i
   n P. bultyncki although we have not measured enough specimens to rule out intraspecific versus ontogenetic variation.
Přispěvatel
    Česká geologická služba
Kód přispěvatele
    ČGS (RIV)
Zdrojový formát
    R
Datum importu
    15. 10. 2014