 | Striatocycloceras obliquum (Eichwald, 1857) |
Taxon description
Kröger & Isakar, 2006
Diagnosis. Straight, slightly compressed Striatocycloceras with high apical angle of approximately 10°. Six, irregularly spaced smooth annulations at a distance that equates the corresponding shell diameter in adult, with three annulations in juvenile specimens, respectively. Annulations slightly oblique toward growth direction with slight lateral sinus, with approximately 10 growth lines per annulation. One suture line at every groove of the annulation, annulations slightly oblique to ward sutures.
Type specimen data
PSM ,
Synonymy list
1857
Orth. obliquum — Eichwald, pp. 196
1860
Orthoceras obliquum — Eichwald, pp. 1209, fig. 49:7
1879
Orthoceras obliquum — Dewitz, pp. 34
1880
Orthoceras obliquum — Dewitz, pp. 170
1930
Orthoceras obliquum — Teichert, pp. 270, 278
2006
Striatocycloceras obliquum (Eichwald, 1860) — Kröger & Isakar, pp. 151, fig. 7K,O; 8D, 11
2013
Striatocycloceras obliquum — Kröger, pp. 25
Selection of related publications
Kröger, B., Isakar, M. 2006.
Revision of annulated orthoceridan cephalopods of the Baltoscandic Ordovician. Fossil Record 9,
1, 137-163. DOI:10.1002/mmng.200600005
Eichwald, E. 1857.
Beitrag zur geographischen Verbreitung der fossilen Thiere Russlands. Alte Periode. (Fortsetzung. S. Bulletin 1856. N 4. pag. 555.). Klasse der Cephalopoden. Bulletin of Moscow Society of Naturalists. Geology 30,
I, 192-219.
References based on distribution