Fusulinella sp. A

Akba, Melikan & Okuyucu, Cengiz, 2022, Fusulinid Biostratigraphy of the Moscovian- Lower Kasimovian of Hadim Nappe, Central Taurides, southern Turkey, Geodiversitas 44 (19), pp. 527-562 : 558

Fusulinella sp. A

( Fig. 18K, L )

STRATIGRAPHIC RANGE. — Carboniferous, Pennsylvanian, lower Moscovian, Kashirian.

OCCURRENCE. — Bademli section of the Hadim Nappe (Bademli-Akseki/ Antalya, Central Taurides, Turkey).

DESCRIPTION

Test large in size and inflated fusiform in shape with convex lateral sides and rounded and knob-like poles. All volutions are coiled loosely. Proloculus could not be measured from the obtained specimens. The number of volutions is mean 5-6 in an advanced specimen, and length ranges between 3.33 to 4.33 mm, diameters range between 1.50 to 2.13 mm and form ratios of 2.04 to 2.22. The four-layered wall is relatively thick (0.035 -0.050 mm in the outer volutions), and is composed of a thin-dark tectum, a thin diaphanotheca, dark lower and upper tectorium. The diaphanotheca is not clearly observed in initial volutions or absent. Septa plain in initial volutions and folded in outer volutions.Chomata are massive,symmetrical and rounded in shape and their heights reach to half height of chamber.

REMARKS

This species is closely similar to some species of Fusulinella concerning the shape of the test, coiling type, septal fluting and wall structure, but because of the absence of ideal sections for better identification, they are determined as Fusulinella sp. A .

Figures

FIG. 18. — Thin-section photomicrographs of the fusulinid assemblages of the Yassıpınar (YS), Bademli (BS) and GÖlbelen (GS) sections:A, Fusulinella praebocki Rauzer-Chernousova in Rauzer-Chernousova,Gryzlova,Kireeva,Leontovich,Safonova & Chernova,1951,axial section,16B42.18.02,BS;B, Fusulinella praecolaniae Safonova in Rauzer-Chernousova, Gryzlova,Kireeva, Leontovich, Safonova & Chernova, 1951, axial section, 16B38.03, BS; C, D, Fusulinella propriaforma Akba ¸s, n. sp.; C, subaxial section, 16B39.03 (holotype), BS; D, axial section, 16B39.08, BS; E, detailed view of the wall structure of the Fusulinella propriaforma Akba ¸s, n. sp., 16B39.08 (four-layered wall including tectum, diaphanotheca, lower and upper tectorium); F, Fusulinella pseudobocki Lee & Chen in Lee, Chen &