Genus

Palaeodawsonocerina Kröger et Isakar, 2006

Taxon description

Kröger & Isakar, 2006

Diagnosis. Straight or slightly cyrtoconic, circular or subcir-cular shell, with prominent, narrowly spaced annulations, growth lines, and numerous subordinate filiform longitudinally raised lines, producing a fine reticulate pattern. Siphuncle central or slightly eccentric, slightly expanded, with achoanitic to very short orthochoanitic septal necks. Apex blunt, slightly cyrtoconic, annulated.

Selection of related publications

Kröger, B. 2025. The Lyckholm acme of cephalopods – Review of the late Katian (Vormsi–Pirgu regional stages) Ordovician cephalopods of Estonia. European Journal of Taxonomy 978, 1-168. DOI:10.5852/ejt.2025.978.2801

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., 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

List of species

1. Palaeodawsonocerina nicolletoides Kröger, 2013 | Katian

2. Palaeodawsonocerina senckenbergi (Teichert, 1930) | Keila Stage→Pirgu Stage

Classification

Organism group	Biota
Kingdom	Animalia
Phylum	Mollusca
Class	Cephalopoda
Subclass	Orthoceratia
Order	Orthocerida
Suborder	Orthoceratina
Family	Dawsonoceratidae
Genus	Dawsonoceras
	Palaeodawsonocerina
Species	nicolletoides
	senckenbergi