Siphopfenderina sp.

SCHLAGINTWEIT, FELIX & SEPTFONTAINE, MICHEL, 2023, Siphopfenderina Gen. Nov. (Type-Species Arenobulimina Geyikensis Solak, 2022), A Primitive Pfenderinid Foraminifera From The Cretaceous Of Neotethys, Acta Palaeontologica Romaniae 19 (1), pp. 53-60 : 56-58

Siphopfenderina sp. aff. geyikensis (Solak)

Fig. 2.7-2.21

Remarks The specimens from the Aptian of northern Spain ( Figs. 2.8-2.9, 2.11, 2.14 ) and central Iran ( Figs. 2.7, 2.10, 2.12-2.13, 2.15-2.21 ) are here treated as a single morphotype exhibiting high variability, and showing similarities to some smaller specimens of Solak (2022, pl. 1, fig. H) re-illustrated herein in Fig. 2.6 . The Turkish type-material shows generally larger dimensions, but with overlapping size-ranges to the Spanish and Iranian material. The number of whorls is three to six; transverse sections show six chambers per whorl.

Dimensions: wall thickness up to 0.065 mm ( Solak, 2022: 0.05 to 0.11 mm); test diameter up to 0.57 mm; test height up to 0.75 mm.

Siphopfenderina ssp.

Figs. 2.22-2.30

1980 Foraminifer F-66 – Radoičić, pl. 5, figs. 1-7 (Coniacian? Santonian? of Serbia).

2017 Arenobulimina sp. – Solak, figs. 11F-G (late Campanian of Turkey), 12K-L, 13U2 (late Maastrichtian of Turkey).

2019 Arenobulimina sp. – Solak et al., fig. 11O-Q (late Maastrichtian of Turkey)

2020 Nezzazatinella picardi – Solak et al., figs. 13F (late Cenomanian of Turkey).

Remarks: Siphopfenderina ssp. is morphologically variable, a common, high-conical morphotype is treated in open nomenclature herein. It has been referred to as

Foraminifer F-66, Arenobulimina sp. , and Nezzazatinella picardi in upper Cenomanian to upper Maastrichtian shallow water carbonates of Croatia, Serbia, and Turkey (see synonymy). The central siphon is clearly visible in the specimens illustrated by Radoičić (1980) ( Fig. 2.22, 2.24 ).

Figures

Fig. 2 Siphopfenderina geyikensis (Solak, 2022) gen. et comb. nov. from the Aptian of Turkey (1-6; Solak, 2022: Pl. 1, fig. a, pl. 2, fig. 1, pl. 1, fig. e, pl. 2, fig. b, pl. 1, fig. c, pl. 1, fig. h). Siphopfenderina sp. aff. geyikensis (Solak) from the Aptian of central Iran (7, 10, 12-13, 15-21), and Cantabria, northern Spain (8-9, 11, 14). Siphopfenderina ssp. from the Coniacian- Santonian? of Serbia (22-26), Cenomanian of SW Iran (27-28), Campanian of Croatia (29-30). Abbreviations: co. = (hollow) central columella, fo. = foramen, p.k. = pseudo-keriotheca, pr. = proloculus, se. = septum.