Dasbergina trigonica
Sugerowana cytacja: Dzik, J. 2015. Dasbergina trigonica (Ziegler, 1962) . Ikonoteka (http://ikonoteka.paleo.pan.pl/xwiki/bin/viewrev/Species/Dasbergina+trigonica+)
Diagnoza The basal cavity of P1 element bifurcates anteriorly. Porównanie In successive samples in the upper part of the Dzikowiec section the anterior lobe of the basal cavity of the P1 element, originally round (Dz-18), gradually becames more angular (Dz-10, Dz-17, Dz-20b) and then its tip narrows and the lobe bifurcates (Dz-19, Dz-47, Dz-4). This marks the transition from D. marburgensis to D. trigonica. This character shows a significant population variability and juveniles may show angular wide lobes even in samples from high above in the section (e.g., Dz-8). The species occurs in the borehole Kowala. Autekologia Występowanie geograficzne Kowala and Dzikowiec. Zasięg czasowy Zone of its own. Materiały muzealne ZPAL: 204 specimens. Literatura Dzik, J. 2006. The Famennian "Golden Age" of conodonts and ammonoids in the Polish part of the Variscan sea. Palaeontologia Polonica 63, 1-359. |
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