Species

Striatocycloceras foerstei (Teichert, 1930)

https://files.geocollections.info/large/f1/40/f1406b7d-c3e1-4e21-b4c0-8b55f7e44dc7.jpg

https://files.geocollections.info/large/9b/ed/9bedd3fe-4860-40c8-b907-ff21f1c0baea.jpg

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

Classification

Organism group	Biota
Kingdom	Animalia
Phylum	Mollusca
Class	Cephalopoda
Subclass	Orthoceratia
Order	Orthocerida
Suborder	Orthoceratina
Family	Orthoceratidae
Subfamily	Orthoceratinae
Genus	Striatocycloceras
Species	foerstei
	isbergi
	obliquum
	romingeri
	undulostriatum