genus F, Korn & Hairapetian

Korn, Dieter & Ghaderi, Abbas, 2025, Late Permian nautiloids from Julfa (NW Iran), European Journal of Taxonomy 1018, pp. 1-113 : 102-103

New genus F Korn & Hairapetian (in press) sp.

Fig. 51 ; Table 31

Material examined

IRAN – West Azerbaijan • 1 specimen; Aras Valley; Paratirolites Limestone of the Ali Bashi Formation ( late Changhsingian); 2011; Korn et al. leg.; illustrated in Fig. 51 ; MB.C.32097 .

Description

Specimen MB.C.32097 is the fragment of a half whorl, which belongs entirely to the body chamber ( Fig. 51A ). The conch has a diameter of about 53 mm and is discoidal and involute (ww/dm=0.45; uw/ dm =0.06). Flanks and venters are rounded. The surface of the internal mould appears to be completely smooth.

Remarks

The single specimen from the Paratirolites Limestone is too poorly preserved to be assigned to a specific species.

Figures

Fig. 51. New genus F Korn & Hairapetian (in press) sp., specimen MB.C.32097 (Korn et al. 2011 Coll.) from the Paratirolites Limestone of Ali Bashi. A. Reconstruction of apertural view. B. Lateral and ventral views. Scale bar units = 1 mm.

Tables

Table 31. Reconstructed conch dimensions (in mm) and ratios of the new genus F Korn & Hairapetian (in press) sp.

Nr.	dm	ww	wh	uw	ah	ww/dm	ww/wh	uw/dm	WER	IZR
MB.C.32097	53	24	29	3	23	0.45	0.83	0.06	3.12	0.21