Chelicerata

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
Classes (3 + 2†): Arachnida – Merostomata – Pycnogonida – †Chasmataspidida – †Eurypterida

Unplaced ordines: †Mollisoniida

Unplaced genera: †Sanctacaris

Chelicerata Heymons, 1901

• Dunlop J.A., 2010. Geological history and phylogeny of Chelicerata. Arthropod structure & development, 39(2-3): 124–142. DOI: 10.1016/j.asd.2010.01.003
• Dunlop J.A. & Selden P.A., 2009. Calibrating the chelicerate clock: a paleontological reply to Jeyaprakash and Hoy. Experimental and applied acarology, 48(3): 183–197. DOI: 10.1007/s10493-009-9247-1 PDF
• Jeyaprakash A. & Hoy M.A., 2009. First divergence time estimate of spiders, scorpions, mites and ticks (subphylum: Chelicerata) inferred from mitochondrial phylogeny. Experimental and applied acarology, 47(1): 1–18. DOI: 10.1007/s10493-008-9203-5
• Legg, D.A. 2014. Sanctacaris uncata: the oldest chelicerate (Arthropoda). Naturwissenschaften 101: 1065–1073. DOI: 10.1007/s00114-014-1245-4  . Reference page. 
• Lerosey-Aubril, R., Kimmig, J., Pates, S., Skabelund, J., Weug, A. & Ortega-Hernández, J. 2020. New exceptionally-preserved panarthropods from the Drumian Wheeler Konservat-Lagerstätte of the House Range of Utah. Papers in Palaeontology 6(4): 501–531. DOI: 10.1002/spp2.1307  . Reference page.