Genus

Danoceras Troedsson, 1926

Taxon description

Kröger & Aubrechtová, 2019

Diagnosis (after Sweet1964). Diestoceratid with conch slightly contracted at aperture; septal necks cyrtochoantic, recumbent; segments elongate, sub-trapezoidal in longitudinal section; thin annulosiphonate rings in septal foramen produce distinctive irregular linear process extending adapically and adorally, but not forming rays continuous from segment to segment.

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., Aubrechtová, M. 2019. The cephalopods of the Kullsberg Limestone Formation, Upper Ordovician, central Sweden and the effects of reef diversification on cephalopod diversity. Journal of Systematic Palaeontology 17, 12, 961-995. DOI:10.1080/14772019.2018.1491899

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

Frye, M. W. 1987. Upper Ordovician (Harjuan) oncoceratid nautiloids from the Boda Limestone, Siljan District, Sweden. GFF 109, 1, 83-99. DOI:10.1080/11035898709454748

Balashov, E. A. 1959. Nekotorye novye vidy nautiloidej ordovika, silura i devona SSSR. Materialy k "Osnovam paleontologii", Bypusk 3, pp. 37-46. Paleontologicheskii Institut Akademii Nauk SSSR.

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. Danoceras breve Strand, 1934 | Lower Ordovician→Ordovician

2. Danoceras broeggeri Strand, 1934 | Katian

3. Danoceras fusiforme Balashov, 1959 | Rakvere Stage

4. Danoceras oviforme Kröger, 2025 | Vormsi Stage→Pirgu Stage

5. Danoceras piersalense (Teichert, 1930) | Nabala Stage→Pirgu Stage

6. Danoceras scandinavicum Strand, 1934 | Katian→Hirnantian

7. Danoceras skalbergensis Kröger et Aubrechtová, 2019 | Sandbian→Katian

8. Danoceras vohilaidense Kröger, 2025 | Pirgu Stage

Classification

Organism group	Biota
Kingdom	Animalia
Phylum	Mollusca
Class	Cephalopoda
Subclass	Multiceratoidea
Order	Oncocerida
Family	Diestoceratidae
Genus	Danoceras
Species	breve
	broeggeri
	fusiforme
	oviforme
	piersalense
	ravni
	scandinavicum
	skalbergensis
	vohilaidense
Genus	Diestoceras
	Dowlingoceras
	Lyckholmoceras