The Triassic ammonite Aristoptychites kolymensis (Kiparisova) from Botneheia, Spitsbergen

• Published in: Polar Research
• Main Authors: Köhler-Lopez, Meike, Lehmann, Ulrich
• Format: Article in Journal/Newspaper
• Language: English
• Published: Norwegian Polar Institute 1984
• Subjects: Botneheia; Polar Research; Spitsbergen
• Online Access: https://polarresearch.net/index.php/polar/article/view/2535; https://doi.org/10.3402/polar.v2i1.6962

Arisroplychifes kolymensis (Kiparisova) is investigated and described in detail from collections made at Botneheia, Spitsbergen, where it occurs at the top of the Botneheia Formation (Daonella Shale). It is a rather small species and the stratigraphically highest representative of the genus in Spitsbergen. Its suture line is remarkable by its possession of the additional U,-lobes between the internal lobe and the first umbilical lobe. A lobe of this kind has so far been described only once, with Arcesfes (Proarcesres) bicarinatuc by Schindewolf (1968), which suggests affinities between Ptychitidae and Arcestidae.