 | Striatocycloceras foerstei (Teichert, 1930) |
Taxon description
Kröger & Isakar, 2006
Diagnosis. Straight Striatocycloceras with circular cross-section and medium apical angle of approximately 8°. Seven irregularly spaced annulations at a distance that equates the corresponding shell diameter. Acute annulations slightly oblique toward growth direction with slight lateral sinus, with approximately 10 growth lines per annulation. One suture lineat every groove of the annulation, sutures and annulations run parallel. Siphuncle central. Short orthochoanitic septal necks.
Type specimen data
SMF XI 358a ,
Synonymy list
1858
Orthoceras arcuolyratum — Schmidt, pp. 196
1916
Orthoceras arcuolyratum — Twenhofel, pp. 298
1930
Leurocycloceras foerstei n. sp — Teichert, pp. 278, fig. 6:13-16
1962
Leurocycloceras foerstei — Balashov, pp. 110, fig. 48:3
2006
Striatocycloceras foerstei (Teichert, 1930) — Kröger & Isakar, fig. 7q, 10h
2013
Striatocycloceras foerstei (Teichert, 1930) — Kröger, pp. 25
Selection of related publications
Kröger, B., Ebbestad, J. O. R., Högström, A. E. S., Frisk, Ǻ. M. 2011.
Mass concentration of Hirnantian cephalopods from the Siljan District, Sweden; taxonomy, palaeoecology and palaeobiogeographic relationships. Fossil Record 14,
1, 35-53. DOI:10.1002/mmng.201000014
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
Teichert, C. 1930.
Die Cephalopoden-Fauna der Lyckholm-Stufe des Ostbaltikums. Paläontologische Zeitschrift 12,
3/4, 264-312. DOI:10.1007/BF03044452
References based on distribution