Drepanodus robustus
Sugerowana cytacja: Moczyński 2018. Drepanodus robustus Hadding 1913. Ikonoteka (http://ikonoteka.paleo.pan.pl/xwiki/bin/viewrev/Species/Drepanodus+robustus)
 Diagnoza The M elements robust, with almost flat surfaces along the posterior external ridge. Mature elements prominently costate, the S0 element usually bear five inner ribs (even in some juveniles). All the elements hyaline with rudimentary white matter . Porównanie The only difference from D. arcuatus consists in the ornamentation of the inner margins of mature elements. There are populations transitional between these two species. The lectotype bears more than one lateral costae, as is the case also with the specimen recovered from the topotype section by Bergström (2007). Such costae are missing in the Protopanderodus species. Autekologia Występowanie geograficzne Mójcza in the Holy Cross Mts. Zasięg czasowy At the discontinuity surface and continues as high above as to 1.8 m above the bentonite (A. tvaerensis/superbus transition zone) . Rare,specifically unidentifiable elements of Drepanodus occur sporadically even higher in the section. Materiały muzealne ZPAL Literatura Dzik, J. 1994. Conodonts of the Mójcza Limestone. In: J. Dzik, E. Olempska, & A. Pisera. Ordovician carbonate platform of the Holy Cross Mountains. Palaeontologia Polonica 53, 43-128. Bergström, S.M. 2007. Middle and Upper Ordovician conodonts from the Fågelsång GSSP, Scania, southern Sweden. Geologiska Föreningens i Stockholm Förhandlingar 129, 77–82. |
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