Liassobetraccium bavaricum ( Kozur and Mostler, 1990 )

Cifer, Tim, Goričan, Špela, Gawlick, Hans-Jürgen & Auer, Matthias, 2020, Pliensbachian, Early Jurassic radiolarians from Mount Rettenstein in the Northern Calcareous Alps, Austria, Acta Palaeontologica Polonica 65 (1), pp. 167-207 : 180

Liassobetraccium bavaricum ( Kozur and Mostler, 1990)

Fig. 6C, D .

1990 Betraccium bavaricum sp. nov.; Kozur and Mostler 1990: 215, pl. 14: 4, 9.

Material. — Sample Rö37: stub Rö37_6 (three specimens), Mount Rettenstein , Northern Calcareous Alps, Austria, Lower Pliensbachian .

Remarks.— Liassobetraccium bavaricum varies in the size of the specimens (compare Fig. 6C and D ) and torsion of spines. Some specimens show stronger torsion throughout the whole length of spines ( Fig. 6C ), whereas others have a weak torsion ( Fig. 6D ). The specimen in Fig. 6C resembles Liassobetraccium hettangicum ( Kozur and Mostler 1990: pl. 14: 4) but has distinct nodes on the pore-frame vertices of the cortical shell.

Stratigraphic and geographic range.—Hettangian ( Kozur and Mostler 1990) and Lower Pliensbachian (this study). Northern Calcareous Alps ( Austria, Germany).

Figures

Fig. 6. Radiolarians from Mount Rettenstein, Austria, Pliensbachian, Early Jurassic. A. Empirea sp. 1, sample Rö416. B. Acaeniotylopsis ghostensis (Carter in Carter et al., 1988); sample Rö416. C, D. Liassobetraccium bavaricum (Kozur and Mostler, 1990); sample Rö37. E, F. Liassobetraccium verticispinosum (Kozur and Mostler, 1990); sample Rö37. G–J. Tozerium filzmoosense Cifer sp. nov. G. Holotype, sample Rö416: 170717. H. Paratype, sample Rö416: 170503. I. Paratype, sample Rö416: 170739. J. Paratype, sample Rö37: 171105. K–O. Loupanus pliensbachicus Cifer sp. nov. K. Holotype, sample Rö416: 170562. L. Paratype, sample Rö416: 170559. M. Paratype, sample Rö416: 170757. N. Paratype, sample Rö416: 170704. O. Paratype, sample Rö416: 170560. P, Q. Loupanus sp. 1; sample Rö417. R, S. Thurstonia? timberensis Whalen and Carter in Carter et al., 1998; sample Rö416. T. Thurstonia? minutaglobus Whalen and Carter in Carter et al., 1998; sample Rö416. U–W. Thurstonia? robusta Cifer sp. nov. U. Holotype, sample Rö417: Rö417_093.V. Paratype, sample Rö417: Rö417_090. W. Paratype, sample Rö417: Rö417_098.