Pseudogastrioceras relicuum Korn & Ghaderi, 2016

Korn, Dieter, Hairapetian, Vachik, Ghaderi, Abbas, Leda, Lucyna, Schobben, Martin & Akbari, Amir, 2021, The Changhsingian (Late Permian) ammonoids from Baghuk Mountain (Central Iran), European Journal of Taxonomy 776, pp. 1-106 : 16-17

Pseudogastrioceras relicuum Korn & Ghaderi in Korn et al., 2016

Fig. 16 ; Table 1

Pseudogastrioceras relicuum Korn & Ghaderi in Korn et al., 2016: 852, text-fig. 12.

Diagnosis

Pseudogastrioceras with moderately large conch; diameter attaining 70 mm. Conch shape thinly discoidal (ww/dm=0.40–0.45), involute (uw/dm = 0.05–0.10) with converging flanks and broadly rounded venter. Ornament with about 15 faint spiral lines on the venter.

Material examined

Holotype IRAN • East Azerbaijan, Ali Bashi N section ; Paratirolites Limestone ; illustrated by Korn & Ghaderi in Korn et al. (2016: text-fig. 12); MB.C.25173 .

Additional material

IRAN • 2 specimens; Esfahan Province, Baghuk Mountain 1 section; Hambast Formation; MB.C.29659 to MB.C.29660 • 1 specimen; Esfahan Province, Baghuk Mountain G section ; Hambast Formation; MB.C.29661 • 2 specimens; Esfahan Province, Baghuk Mountain H section ; Hambast Formation; MB.C.29662 to MB.C.29663 .

Description

All specimens are rather poorly preserved, but MB.C.29661 is the best of them, though somewhat deformed ( Fig. 16 ). It is a corroded specimen with a 56 mm conch diameter, which does not allow accurate measurements of the conch.

Stratigraphic range

Paratirolites Limestone ; 6.80 to 3.30 m below the extinction horizon ( Dzhulfites nodosus Zone to Paratirolites lanceolobatus Zone ).

Figures

Fig. 16. Pseudogastrioceras relicuum Korn & Ghaderi, 2016, lateral and reconstructed dorsal views of specimen MB.C.29661. Scale bar units =1 mm.