Liassobetraccium verticispinosum ( 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 : 180-181

Liassobetraccium verticispinosum ( Kozur and Mostler, 1990)

Fig. 6E, F .

1990 Betraccium verticispinosum sp. nov.; Kozur and Mostler 1990: 216, pl. 14: 7, 8.

Material. — Sample Rö37: stubs Rö37_1 (one specimen), Rö37_6 (two specimens), Mount Rettenstein , Northern Calcareous Alps, Austria, Lower Pliensbachian .

Remarks.—In this species, the torsion of spines is strong and, according to the original definition, limited to the distal third of spines. In our material, the degree of torsion varies among spines of the same specimen ( Fig. 6F ) and the differentiation from Liassobetraccium bavaricum is not sharp (compare Fig. 6C ). It is possible that in future studies, when more material is available, different Liassobetraccium with torsioned spines will be merged in one species.

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.