Trigonotarbida

Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Ecdysozoa
Cladus: Panarthropoda
Phylum: Arthropoda
Subphylum: Chelicerata
Classis: Arachnida
Ordo: †Trigonotarbida
Familiae: †Anthracomartidae – †Anthracosironidae – †Aphantomartidae – †Archaeomartidae – †Eophrynidae – †Kreischeriidae – †Lissomartidae – †Palaeocharinidae – †Trigonotarbidae
Genera incertae sedis: †Namurotarbus – †Palaeotarbus – †Xenarachne

Trigonotarbida Petrunkevitch, 1949

• Trigonotarbi Petrunkevitch, 1949 (original spelling)
• Trigonotarbida: Petrunkevitch, 1955: 107 (emendation)

• Petrunkevitch, A.I. 1949. A study of the structure classification and relationships of the Palaeozoic Arachnida based on the collections of the British Museum. Transactions of the Connecticut Academy of Arts and Sciences 37: 69–315. Reference page. 
• Petrunkevitch, A.I. 1955. Arachnida. 42–162. In Moore, R.C. (ed.) Treatise on Invertebrate Paleontology, Part P, Arthropoda 2. 181 pp. Geological Society of America and University of Kansas Press, Lawrence, Kansas. Links to PDF Reference page. 

• Jones, F.M., Dunlop, J.A., Friedman, M., Garwood, R.J. 2014. Trigonotarbus johnsoni Pocock, 1911, revealed by X-ray computed tomography, with a cladistic analysis of the extinct trigonotarbid arachnids. Zoological Journal of the Linnean Society 172(1): 49–70. DOI: 10.1111/zoj.12167 Reference page. 
• Poschmann, M. & Dunlop, J.A. 2010. Trigonotarbid arachnids from the Lower Devonian (Lower Emsian) of Alken an der Mosel (Rhineland-Palatinate, SW Germany). Paläontologische Zeitschrift 84(4): 467–484. DOI: 10.1007/s12542-010-0061-1
• Poschmann, M. & Dunlop, J.A. 2011. Trigonotarbid arachnids from the Lower Devonian (Siegenian) of Bürdenbach (Lahrbach Valley, Westerwald area, Rhenish Slate Mountains, Germany). Paläontologische Zeitschrift 85(4): 433–447. DOI: 10.1007/s12542-011-0109-x