Pleydellia (Cotteswoldia) fuselieri Rulleau and Elmi, 2001

Seyed-Emami, Kazem, Fürsich, Franz T., Wilmsen, Markus, Majidifard, Mahmoud R. & Shekarifard, Ali, 2008, Lower and Middle Jurassic ammonoids of the Shemshak Group in Alborz, Iran and their palaeobiogeographical and biostratigraphical importance, Acta Palaeontologica Polonica 53 (2), pp. 237-260 : 252

Pleydellia (Cotteswoldia) fuselieri Rulleau and Elmi, 2001

Fig. 6A.

2001 Pleydellia (Cotteswoldia) fuselieri ; Rulleau and Elmi in Rulleau et al. 2001: 77, pl. 16: 7, 8.

Material.—A one−side preserved specimen from Kuhe Bashm (050511−6/1).

Dimensions (in mm)

Specimen D U H W

050511−6/1 ~46 ~43 ~33 ~30

Description.—Evolute form with an ovate whorl cross−section, slightly higher than wide, and with a low, blunt keel. Ribs are single, strong, and well spaced. Ventrolaterally, the ribs bend slightly forward and fade on the fairly broad venter.

Discussion.—Except for the slightly coarser ribbing and wider umbilicus, our specimen closely matches P. (C.) fuselieri .

Stratigraphic and geographic range.—Kuhe Bashm, level VI. Together with P. aalensis and P. subcompta from the Late Toarcian Pleydella aalensis Zone.