Amplexocarinia rozkowskae Fedorowski, 2003

Denayer, Julien, 2016, Rugose corals across the Devonian-Carboniferous boundary in NW Turkey, Acta Palaeontologica Polonica 61 (1), pp. 51-70 : 64

Amplexocarinia rozkowskae Fedorowski, 2003

Fig. 8H .

1969 Amplexocarinia muralis Soshkina ; Różkowska 1969: 82, pl. 3: 5, 8, 9, pl. 8: 6.

2003 Amplexocarinia rozkowskae sp. nov.; Fedorowski 2003: 66, pl. 18: 8–10.

2005 Amplexocarinia rozkowskae Fedorowski ; Chwieduk 2005: 408, pl. 5: 5.

2009 Amplexocarinia rozkowskae Fedorowski ; Fedorowski 2009: 237, fig. 3E, F.

Holotype: Specimen 3/25a figured as Amplexocarinia muralis by Różkowska (1969: pl. 3: 5a, b).

Type locality: Kadzielnia, Holy Cross Mountains, S Poland.

Type horizon: Famennian, Upper Devonian.

Material.—Single specimen(1 TS) from the Dallıca (Bartın), uppermost Famennian.

Diagnosis.—See Fedorowski (2003).

Description.—The corallum is 2 mm in diameter, its aulos is well developed and 0.75 mm in diameter. There are 9 septa, thickened at the base, thin elsewhere. The minor septa are not developed. The cardinal fossula is marked by a slight withdrawal of the aulos edge toward the periphery. There are no dissepiments. The wall is 0.3 mm-thick and regular.

Remarks.—The diameter and number of septa are compatible with these of Amplexocarinia rozkowskae Fedorowski 2003 , particularly if considered as a juvenile specimen like those figured by Chwieduk (2005). A. rozkowskae Fedorowski 2003 is the sole species of Amplexocarinia Soshkina, 1928 described in the Famennian. The other aulos-bearing genera known in equivalent strata are Syringaxon Lindström, 1882 ( Chwieduk 2005) and Neaxon Kullmann, 1965 ( Semenoff-Tian-Chansky 1988; Berkowski 2002). Both have a narrow aulos and thickened septa and wall.

Stratigraphic and geographic range.— Amplexocarinia rozkowskae occurs in the Famennian of Pomerania ( Chwieduk 2005). The present specimen was collected, together with Pseudoendophyllum sp. , in the Yılanlı Formation in the Dallıca (Bartın). The occurrence of the foraminifer Avesnella sp. indicates the lower part of the Strunian DFZ5–6 biozones of Poty et al. (2006).

Figures

Fig. 8. Devonian–Carboniferous rugose corals from Turkey. A–E. Caninophyllum charli sp. nov. from the lower Tournaisian (upper Hastarian) of Zonguldak, Gökgöl section. A. Holotype, G.8.1.1, successive TS (A1, A2); close-up view of the dissepimentarium, TS (A3). B. G.8.6.1, successive TS (B1, B2). C. G.8.4.3, TS. D. G.8.4.2, TS. E. G.8.3.2, LS. F, G. Uralinia simplex (Yü, 1933) from the lower Tournaisian (lower Hastarian) of Bartın, Topluca section. F. ET.9c.7, TS. G. ET.9c.8, TS. H. Amplexocarinia rozkowskae (Fedorowski, 2003) from the uppermost Famennian (Strunian) of Bartın, Dallıca section, D.2.4.II’, TS. I.?Metriophyllum sp. from the uppermost Famennian (Strunian) of Bartın, Topluca section, ET.11.X, TS. J–L. Bounophyllum praecursor (Frech, 1895) form the uppermost Famennian (Strunian) of Bartın, Topluca section. J. ET.12a.1.III, successive TS (J1–J3). K. ET.12a.1.II, TS. L. ET.12a.1.V, LS. Scale bar A–G, 5 mm; H, 3 mm; I, 1.9 mm; J–L, 2.5 mm.