Retiophyllia sp.

Roniewicz, Ewa, 2011, Early Norian (Triassic) corals from the Northern Calcareous Alps, Austria, and the intra-Norian faunal turnover, Acta Palaeontologica Polonica 56 (2), pp. 401-428 : 412-414

Retiophyllia sp.

Fig. 4A .

Material.—GBA 2009/019/4, a corallum fragment in organodetrital limestone, with thin section.

Remarks.—The coral resembles Retiophyllia robusta Roniedoi :10.4202/app.2009.0092

wicz, 1989 from the Rhaetian Zlambach Beds in its elongated calicular fossa, and robust septa of four size orders. Twelve thick septa reach the fossa, with the six S1 septa thicker than the S2 septa. The zigzag midline is well marked. Dissepiments are rare.

Stratigraphic and geographic range.— Austria: Northern Calcareous Alps, Dachstein Plateau: north of Feisterscharte, lower Norian, Epigondolella quadrata Conodont Zone.

Figures

Fig. 4. Reimaniphylliid corals from vicinity of Feisterscharte, Austria, early Norian, Triassic. A. Retiophyllia sp.; GBA 2009/019/4g. Septal apparatus with + thick S1 septa, transverse section. B. Retiophyllia aranea sp. nov.; GBA 2009/019/14. corallites circular in section (B1) with a large axial space (B2); longitudinal/oblique section (B3) showing sub−horizontal, large dissepiments in the axial space, and longitudinal section of distal part of the corallite (B4) show− ing convex dissepiments at the periphery.C. Retiophyllia aff. fenestrata (Reuss, 1854); GBA 2009/019/11a, b. Corallites in transverse (C1) and longitudinal (C2) sections showing small number of septa and large dissepiments. D. Retiophyllia aff. tolminensis Turnšek, 1987; GBA 2007/152/3f. Corallite in transverse section showing zigzag septa. E. Retiophyllia vesicularis sp. nov.; GBA 2009/019/12g, c. Corallites in longitudinal (E1) and transverse (E2) sections; note large and convex dissepiments and irregular shape of septa. F–G. Craspedophyllia? sp. F. GBA 2009/019/16b; transverse sections with corallites showing rare, obliquely directed menianes. G. Zigzag traces of septal microstructure; GBA 2009/019/17a (G1), GBA 2009/019/17b (G2).