Cyathophyllidae Dana, 1846

Family Cyathophyllidae Dana, 1846 Genus Moravophyllum Kettnerová, 1932

Type species: Moravophyllum ptenophylloides Kettnerová, 1932 , from the lower Givetian , Middle Devonian, of Moravia, Czech Republic .

Diagnosis (after Kettnerová 1932).—Cylindrical solitary rugose coral with septa of two orders, variable in thickeness. The septa are radially arranged in the counter quadrants and pinnately disposed on both sides of the cardinal septum in the cardinal quadrants. Major septa long but leaving a free space in the axial part of the corallites. Minor septa reaching the edge of the tabularium. Wide tabularium made of complete and incomplete tabulae. Dissepimentarium made of globose dissepiments arranged in horizontal layers in its outer part and declined towards the tabularium in the inner part.

Moravophyllum sp.

Fig. 6A, B View Fig .

Material.—Two incomplete specimens (PAULg. SCH I.5 and PAULg. ROT.2) from the Middle Devonian (upper Eifelian–?lower Givetian) Russ Conglomerate, Schirmeck and La Rotonde de Schirmeck outcrops, France.

Description.—Solitary rugose corals 17–18 mm in diameter having 26–28 septa of each order. Septa straight and thin in the tabularium, slightly thickened in the dissepimentarium. The major septa are long, joined in bundles, pinnately arranged in the cardinal quadrants, and more radially arranged in the counter quadrants, alar septa connected. Cardinal and counter septa similar to the other septa in one specimen but shorter in the other specimen. Minor septa long reaching the margin of the tabularium. Dissepimentarium made of 4–7 rows of small interseptal dissepiments, either concentric or angulo-concentric. Cadinal fossula slightly marked by the withdrawal of the cardinal septum. No longitudinal section is available to describe the tabulae.

Remarks.— Moravophyllum ptenophylloides Kettnerová, 1932 , is larger, reaching 55 mm in diameter and 60 septa of each order. Moravophyllum oliveri Birenheide, 1987 , has more than 40 septa at 45 mm in diameter. These two specimens probably belong to a distinct species yet to be named but the bad preservation of the present material precludes to a proper definition.

Moravophyllum sp. comes from the Schirmeck and Rotonde de Schirmeck outcrops. Moravophyllum ptenophylloides is known from the lower Givetian, Middle Devonian, of Moravia ( Kettnerová 1932). A similar species has been described in the Givetian of Mauritania ( Moravophyllum cf. ptenophylloides, Coen-Aubert 2017 ) and Yunnan ( Jin 2005). Moravophyllum oliveri is from the upper Eifelian, Middle Givetian, of the Eifel Hills, Germany ( Birenheide 1987; Schröder 1995, 1998).