Retiophyllia aff. fenestrata ( Reuss, 1854 )

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

Retiophyllia aff. fenestrata ( Reuss, 1854)

Fig. 4C .

Material.—A fragment of phaceloid corallum GBA 2009/ 019/11, with thin sections.

Measurements (in mm):

d s sd/1 ed/3 6 36 (9S1+9S2+18S3) 3–4 4

Remarks.—This early Norian coral is similar to the Rhaetian Calamophyllia fenestrata Reuss (1854: 105 , pl. 5: 20 non 21), which was revised and assigned to the genus Retiophyllia Cuif by Roniewicz (1989: 59, pl. 9: 6; pl. 10: 1; pl. 13: 1, see also for synonymy). It has the corallite dimensions of adult R. fenestrata but shows septa differentiated into three orders only as seen in juvenile specimens of the species from Fischerwiese and the vicinity of the Gosaukamm (Kesselwand).

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).