Parastraeomorpha 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 : 424

Parastraeomorpha sp.

Fig. 8A .

Material.—Fragments of colonies in sample GBA 2009/ 019/3.

Remarks.—Small fragments of thamnasterioid colonies with skeleton structure typical of Parastraeomorpha . Calicular centres 1.5–2.5 mm apart. Septa compact, synapticulae numerous. The fragments are preserved in detrital limestone, together with fragments of Pachysolenia cylindrica and other skeletal detritus.

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

Figures

Fig. 8. Astraeomorphid coral and some undetermined coral taxa, and the hydrozoan Cassianastraea reussi (Laube, 1865). Vicinity of Feisterscharte, Austria, early Norian, Triassic. A. Parastraeomorpha sp.; GBA 2009/019/3c. A colony fragment in transverse section (A1), and the same in oblique section (A2) showing synapticulae (arrows). B. A solitary coral of the smallest fossil scleractinian corals described so far; GBA 1995/2/1/2h. Note the external corallite surface micromorphology. C. Forking thick−septal coral; GBA 2007/152/3b–d. Transverse section of the distal corallite part (C1); a new centre indicated by an arrow; proximal corallite part with papillar columella (C2), and its details magnified (C4); longitudinal section (C3) showing tabuloid dissepiments. D. Cassianastraea reussi (Laube, 1865); GBA 1995/2/1/2f. Transverse section of a branch (D1), with a calice (upper arrow) and canals (lower arrow); a fragment of the same section (D2) to show a calice with five septa (marked with arrows).