Polynodosus lauriformis
Sugerowana cytacja: Dzik 2015. Polynodosus lauriformis Dreesen & Dusar 1974. Ikonoteka (http://ikonoteka.paleo.pan.pl/xwiki/bin/viewrev/Species/Polynodosus+lauriformis+)
 Platform-bearing derivative of Mehlina, Polynodosus lauriformis from the L. styriacus Zone at Ostrówka in the Holy Cross Mountains. Diagnoza Laurus leaf-shaped platform ornamented with nodes, restricted to its margin in juvenile specimens and covering the whole platform surface in adults. Porównanie From the coeval Lagovignathus fallax differs in the coarse ornamentation of the platform and the composition of the apparatus, from its probable ancestor P. transitus in a more regular outline of the platform. In samples Ł-24 and Ł-26 specimens morphologically indistinguishable from P. lauriformis co-occur with those of P. transitus and transitional specimens are rare. Whether these are sympatric species or just a case of population variability, remains to be clarified. There is a possibility that P. lauriformis is a more off-shore counterpart of P. transitus. Autekologia Występowanie geograficzne Kowala, Wzdół, Miedzianka, and Ostrówka. Zasięg czasowy From the C. marginifera to L. styriacus Zones. Materiały muzealne ZPAL: 367 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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