A description is given of the Brachythoraci parasphenoid as compared with the corresponding structure in Acanthaspidians and some Crossopterygians (Porolspidae) and with the Acanthodian -anterior-basal .
PL
Notatka zawiera opis parasphenoideum Brachythoraci z górnego dewonu K ie1c oraz porównanie z odpowiednim elementem u Acanthaspida i, niektórych Crossopterygii (Porolepidae), jak również z antero-basale Acanthodii.
Paleozoological Laboratory, Polish Academy of Sciences, Warsaw, Poland
Bibliografia
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