Fusulinella propriaforma Akbaş, 2022

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 propriaforma Akbaş , n. sp.

( Fig. 18C, D )

urn:lsid:zoobank.org:act:37639912-FEA9-4EE2-9F23-75130BEEDD5B

HOLOTYPE. — Specimen no. 16B39.03 .

ETYMOLOGY. — This new species is named for its similarity to the Fusulinella propria Ivanova, 1980 .

MATERIAL EXAMINED. — Two axial sections (specimens nos 16B39.03 and 16B39.08 ).

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

DIAGNOSIS. — A species of genus Fusulinella with cylindrical to ovoid test, convex lateral sides and rounded poles.

STRATIGTAPHIC RANGE. — Carboniferous, Pennsylvanian, upper Moscovian, Podolskian.

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

DESCRIPTION

Test relatively large in size and inflated cylindrical to ovoid in shape with convex lateral sides and rounded poles. All volutions are loosely coiled. The initial first volution is spherical in shape and in succeeding volutions test begin to elongation and ovoid in shape in the outer volutions. Proloculus globular and moderately in size, with an outside diameter of 100- 150 microns. The number of volutions is up to commonly 5 in advance specimens, and length ranges between 2.80 to 2.90 mm, diameters range between 1.70 to 1.80 mm and form ratios of 1.56 to 1.71. The four-layered wall is thick (0.045 -0.060 mm in the outer volutions), and is composed of a thin tectum, a prominent and thick diaphanotheca, dark lower and upper tectorium ( Fig. 18E ). Septa intense and folded throughout to the coiling axis of the test. Chomata are massive, symmetrical and rounded in shape.

REMARKS

Fusulinella propriaforma Akbaş , n. sp. is similar to Fusulinella propria but differs by more rounded poles.

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 &