Pseudarietites serratus Vöhringer, 1960

Korn, Dieter & Weyer, Dieter, 2023, The ammonoids from the Gattendorfia Limestone of Oberrödinghausen (Early Carboniferous; Rhenish Mountains, Germany), European Journal of Taxonomy 882, pp. 1-230 : 186-187

Pseudarietites serratus Vöhringer, 1960

Fig. 115C

Pseudarietites serratus Vöhringer, 1960: 166 , pl. 6 fig. 8.

Paralytoceras serratum – Korn 1994: 79, text-fig. 70i.

non Pseudarietites serratus – Ruan 1981: 88, pl. 22 figs 1–3. — Sheng 1989: 117, pl. 34 fig. 8.

Material examined

Holotype

GERMANY • Rhenish Mountains, Oberrödinghausen, railway cutting; Hangenberg Limestone, bed 1; Vöhringer Coll.; illustrated by Vöhringer (1960: pl. 6 fig. 8) and Korn (1994: text-fig. 70i); re-illustrated here in Fig. 115C ; GPIT-PV-63964.

Additional material

GERMANY • 1 specimen; Rhenish Mountains , Oberrödinghausen, railway cutting; Hangenberg Limestone, bed 1; Weyer 1993–1994 Coll.; MB.C.31222 .

Description

Holotype GPIT-PV-63964 is the larger of only two fragments available ( Fig. 115C ). It is part of a specimen only about 10 mm in diameter, consisting of only one whorl segment. The conch is apparently rather widely umbilicate and the whorl profile is crescent-shaped. There is a broad, weakly serrated keel on the middle of the venter. On the flank there are coarse, rounded ribs with a concave course; they already disappear on the outer venter at some distance from the keel.

Remarks

It is not completely clear that Pseudarietites serratus belongs to this genus; however, the form of the venter with two longitudinal grooves and the keel between the grooves speak for this attribution. The specimen illustrated by Korn (1988b) as “ Paralytoceras cf. serratum ” is poorly preserved and it is not clear if it belongs to this species. Because of the insufficient material, the species can only tentatively be attributed to Pseudarietites .

Pseudarietites serratus differs from the other species of the genus in the broad, crescent-shaped whorl section and the noded keel.

Figures

Fig. 115. Pseudarietitinae from the Oberrödinghausen railway cutting, all Vöhringer Coll. A. Rodingites planissimus (Vöhringer, 1960), holotype GPIT-PV-63962 from bed 3a. B. Rodingites carinatus (Vöhringer, 1960), holotype GPIT-PV-64011 from bed 3b. C. Pseudarietites serratus Vöhringer, 1960, holotype GPIT-PV-63964 from bed 1. Scale bar units =1 mm.