Ophiocistioidea (Echinodermata) z dewonu środkowego Gór Świętokrzyskich
2013; Polish Geological Institute; Volume: 28; Linguagem: Inglês
ISSN
2082-5099
Autores Tópico(s)Echinoderm biology and ecology
ResumoZ reziduow probek konodontowych pochodzących z warstw grzegorzowickich i skalskich uzyskano plytki zebowe Ophiocistioidea . Opisano Cardioserra minima gen. n. i sp. n. Nowy gatunek jest stowarzyszony z licznym i zroznicowanym zespolem organizmow morskich, glownie bentonicznych (Tabulata, Polychaeta, Brachiopoda, Ostracoda, Gastropoda, Crinoidea, Echinoidea, Holothurioidea ). Określony dotychczas zasieg stratygraficzny C. minima sp. n. zawiera sie w przedziale eifel-dolny zywet. OPHIOCISTIOIDEA ( ECIDNODERMATA ) FROM THE MIDDLE DEVONIAN DEPOSITS OF THE GORY ŚWIĘTOKRZYSKIE MTS In residues of conodont samples coming from Grzegorzowice Beds and Skaly Beds calcite plates were found. They were defined as goniodonts of Ophiocistioidea and were included into the new taxa Cardioserra minima gen. n., sp. n. In residues Cardioserra minima was associated by scolecodonts, gastropods, ostracods, crinoids, echinoids, ophiuroids. Ramose tabulata and brachiopods were noticed from the places of sampling. It shows that Cardioserra minima was a component of rich assemblage of marine benthos fauna. The stratigraphic range of Cardioserra minima compries Eifelian and the Lower Givetian. Systematic part Class Ophlocistioidea Sollas; 1899 Cardioserra gen. n. Derivationominis. From the heart-shaped of plate (lat. cor ) with dentate margins (lat. serra = saw). Type species. Cardioserra minima sp. n. Diagnosis. As for type species. Cardioserra mimima sp. n. (Tabl. I, Figs. 1-5) Holotypus. Tab. 1, Fig.5 Locus typicus. Grzegorzowice profile, complex II (M. Pajchlowa, 1957), Grzegorzowice near Slupia Nowa. Gory Świetokrzyskie Mts. Stratumtypicum. Eifelian and Lower Givetian - Grzegorzowice Beds, Skaly Beds. Derivationominis . From the small dimensions (lat. minima = the smallest). Materia1. 11 specimens and 38 fragments. IG Kielce. Dimensions (Fig. 2): Z'- 0,62-1,25; B - 0,41-1,21; L - 0,35-0,69; D - 0,05-0,10; H- 0,04-0,12; F - 0,025-0,77; N - 0,04-0,09 mm. Diagnosis. Very small goniodont with distinctly longer and wider main corner than others and only 8-10 corners on each dentate margin. Description. Heart-shaped plate, regularly symmetric, the smallest of the known. The main corner distincly longer and wider than others. Their largeness gradually decreases posteriorly. The prints of the following plate on the dorsal side are visible by the big specimen only. Remarks. Cardioserra minima differs from the known Ophiocistioidea by the small dimensions of goniodonts. The plate of C. minima distinctly differenciates from goniodonts of Rotasaccus dentifer Haude et Langenstrassen, the fewer number of corners, its regular distribution and the lack of S-shaped dentate margins. General view of C. minima is similar to goniodonts of Anguloserra thomasi Haude et Langenstrassen and Sollasina woodwardii (Sollas). I lower the plates of A. thomasi Haude et Langenstrassen are the biggest; they reach the length and width of 0,5 cm while the same dimensions of C. minima are not larger than 1,3 mm. Moreover lateral corners of A. thomasi Haude et Langenstrassen are distinctly curved toward the main corner. It is not observed by described goniodonts. The plates of Sollasina woodwardi (Sollas) are larger, the main corner is smaller than in Cardioserra minima and the number quantity of lateral corners is probably smaller. Occurence. Poland, Gory Świetokrzyskie Mts - Grzegorzowice, Zbrza, Marzysz, Kostomloty, Stara Gora, Zareby, Jaronowice, Wierzbontowice, Porzecz.
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