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Abstrakty
New Pridoli to Eifelian acanthodian scales from various structural units of the Timan-Pechora region are described. Among 15 new species and 1 new genus, there are: 10 new species of nostolepids, common members of most of the biostratigraphic associations, the monospecific genus Monospina gen. nov., a single new species of Cheiracanthoides (all Climatiida), Diplacanthus pechorensis sp. nov. (Diplacanthida), and two new species of Gomphonchus (Ischnacanthida). Besides morphologic descriptions the taxa are also characterised histologically. Acanthodian taxa with scale crowns and bases composed of cellular bone, or very similar tissue, proposed as a primitive feature in their evolution, are reported for the first time.
Czasopismo
Rocznik
Tom
Strony
209--245
Opis fizyczny
Fot., mapy, wykr.,
Twórcy
autor
- Institute of Geology and Geography, T. Sevcenkos 13, Vilnius 2600, Lithuania, valiuk@geologin.lt
Bibliografia
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BGPK-0833-3377