Cephalopoda
Species

Isorthoceras wahlenbergi Niko, 2008

Taxon description

Niko, 2008

Diagnosis.—Large species of Isorthoceras with circular shell cross section, weak endogastric curvature, smooth shell surface, and two constrictions in body chamber; maximum diameter of body chamber attains 31 mm; siphuncle near central in position shifting slightly with ontogeny from a slightly supracentral to a more central position; segments pyriform to fusiform in shape with weakly developed parietal endosiphuncular deposits.

Synonyymit
2008     Isorthoceras wahlenbergi — Niko , pp. 195 , fig. 6:1.6-6
2013     Isorthoceras wahlenbergi Niko, 2008 — Kröger , pp. 66 , fig. 4C, 26, 28C
Aiheeseen liittyvät julkaisut
Kröger, B. 2013. The cephalopods of the Boda Limestone, Late Ordovician, of Dalarna, Sweden.European Journal of Taxonomy 41 , 41,1-110. DOI:10.5852/ejt.2013.41