Family
Dawsonoceratidae Flower, 1962
Taxon description
Kröger & Isakar, 2006
Emended diagnosis. Annulated orthocones with slender,central to subcentral, tubular or moderately expanded si-phuncle. Septal necks very short and can vary betweenachoanitic, suborthochoanitic, or very short cyrtochoanitic insome developed species. Shell ornamented with a reticulatepattern of growth lines and fine longitudinal raised lines, orwith transverse festoons. Apical shell large, without cicatrix,without initial constriction, apex blunt, annulated or smooth,transverse or longitudinal ornamentation may occur. Incipi-ent annulosiphuncular deposits, and mural cameral depositsare known
Selection of related publications
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
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. 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., Isakar, M. 2006. Revision of annulated orthoceridan cephalopods of the Baltoscandic Ordovician.Fossil Record 9 , 1,137-163. DOI:10.1002/mmng.200600005
Kiselev, G. N. 1991. Revizia pozdneordovikskikh i siluriskikh tsefalopod Pribaltiki iz kollektsii E. I. Eichwalda.Bulletin of the Moscow Society of Naturalists. Geological series 66 , 4,85-101.
Stumbur, H. 1955. Eesti NSV ülem-ordoviitsiumi nautiloiididest [Diplomitöö].
Teichert, C. 1930. Die Cephalopoden-Fauna der Lyckholm-Stufe des Ostbaltikums.Paläontologische Zeitschrift 12 , 3/4,264-312. DOI:10.1007/BF03044452
List of species
1. Dawsonoceras annulatum (Sowerby, 1816) | Wenlock
2. Dawsonoceras barrandei Horny, 1956 | Wenlock
3. Dawsonoceras fenestratum (Eichwald, 1860) | Porkuni Stage
4. Dawsonoceras gregarium Kröger, Ebbestad, Högström et Frisk, 2011 | Hirnantian
6. Dawsonoceras stumburi Kröger, 2013 | Vormsi Stage
7. Palaeodawsonocerina nicolletoides Kröger, 2013 | Katian
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Klassificering
| Organism group | Biota |
| Kingdom | Animalia |
| Phylum | Mollusca |
| Class | Cephalopoda |
| Subclass | Orthoceratia |
| Order | Orthocerida |
| Suborder | Orthoceratina |
| Family | Arionoceratida |
| Arionoceratidae | |
| Dawsonoceratidae | |
| Genus | Dawsonoceras |
| Palaeodawsonocerina | |
| Family | Eriditidae |
| Geisonoceratidae | |
| Lamellorthoceratidae | |
| Orthoceratidae | |
| Proteoceratidae | |
| Tripteroceratidae |
See also