Species
Ctenoceras schmidti Noetling, 1884
Taxon description
Kröger & Isakar, 2006
Diagnosis. Ctenoceras with irregularly spaced annulations, with two to four annulations at a length equal to the diameter of the conch. Two or three ridges of the annulations occur between two subsequent suture lines. Apical angle between 2 and 7°. Adult dorsoventral shell diameter about 17 mm.
Type specimen data
MB.C. 9111 ,
Synonymy list
1877 Orthoceras verticillatum v. Hagenow — Krause , pp. 24-25
1880 Cycloceras hisingeri Boll — Schröder , pp. 62
1884 Ctenoceras schmidti sp. nov. — Noetling , pp. 116-122 , fig. 16:7,8; 18:3-5a
1931 Ctenoceras schmidti Noetling — Troedsson , pp. 16
1962 Ctenoceras schmidti Noetling — Balashov & Zhuravleva , fig. 11:8
1964 Ctenoceras schmidti Noetling — Sweet , pp. 255 , fig. 155:1a-c
1971 Ctenoceras schmidti Noetling — Neben & Krüger , pp. 17 , fig. 14-15
1973 Ctenoceras schmidti Noetling — Neben & Krüger , pp. 81 , fig. 14-17
1984 Ctenoceras schmidti Noetling — Dzik , pp. 97, 105 , fig. 39, 66
2004 Ctenoceras schmidti Noetling, 1884 — Kröger , pp. 63 , fig. 11A
2006 Ctenoceras schmidti Noetling, 1884 — Kröger & Isakar , pp. 145 , fig. 7A-J, 8F
Selection of related publications
Kröger, B. 2007. Concentrations of juvenile and small adult cephalopods in the Hirnantian cherts (Late Ordovician) of Porkuni, Estonia. Acta Palaeontologica Polonica 52, 3, 591–608.
Kröger, B. 2004. Revision of Middle Ordovician orthoceratacean nautiloids from Baltoscandia. Acta Palaeontologica Polonica 49, 1, 57-74.
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Classification
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Mollusca |
| Class | Cephalopoda |
| Subclass | Orthoceratia |
| Order | Orthocerida |
| Suborder | Orthoceratina |
| Family | Orthoceratidae |
| Subfamily | Orthoceratinae |
| Genus | Ctenoceras |
| Species | schmidti |
| sweeti |
See also
References based on distribution
- Kröger, 2004a Lasnamägi Stage
- Kröger, 2004a