Family

Ptychagnostidae Kobayashi, 1939

Selection of related publications

Weidner, T., Nielsen, A. T 2016. Tomagnostus brantevikensis n. sp. (Trilobita) from the middle Cambrian of Scania, Sweden. Bulletin of the Geological Society of Denmark 64, 111–116. DOI:10.37570/bgsd-2016-64-06

Rushton, A. W. A., Weidner, T. 2007. The Middle Cambrian paradoxidid trilobite Hydrocephalus from Jämtland, central Sweden. Acta Geologica Polonica 57, 4, 391-401.

Axheimer, N., Eriksson, M. E., Ahlberg, P., Bengtsson, A. 2006. The middle Cambrian cosmopolitan key species Lejopyge laevigata and its biozone: new data from Sweden. Geological Magazine 143, 4, 447-455. DOI:10.1017/S0016756806002007

List of species

1. Acidusus aculeatus (Angelin, 1851)

2. Acidusus atavus (Tullberg, 1880) | Cambrian

3. Goniagnostus nathorsti (Brøgger, 1878)

4. Lejopyge armata (Linnarsson, 1869) | Middle Cambrian (old nomenclature)

5. Lejopyge calva Robison, 1964

6. Lejopyge elegans (Tullberg, 1880)

7. Onymagnostus hybridus (Brøgger, 1878)

8. Pentagnostus praecurrens (Westergård, 1936) | Cambrian

9. Ptychagnostus affinis (Brøgger, 1878)

10. Tomagnostus brantevikensis Weidner et Nielsen, 2016 | Wuliuan→Drumian

11. Tomagnostus fissus (Lundgren, 1879) | Wuliuan→Drumian

12. Tomagnostus perrugatus (Grönwall 1902) | Wuliuan→Drumian

13. Tomagnostus sibiricus Pokrovskaya et Egorova, 1972 | Wuliuan

14. Triplagnostus gibbus (Linnarsson, 1869a)

Classification

Organism group	Biota
Kingdom	Animalia
Phylum	Arthropoda
Subphylum	Trilobita
Order	Agnostida
Suborder	Agnostina
	Eodiscina
Family	Clavagnostidae
	Diplagnostidae
	Glyptagnostidae
	Ptychagnostidae
Genus	Acidusus
	Goniagnostus
	Onymagnostus
	Pentagnostus
	Ptychagnostus
	Tomagnostus
	Triplagnostus
unranked	Lejopyge
Family	Spinagnostidae