Dekatriata

Dekatriata; Temporal range: Middle Ordovician – present, 467.3–0 Ma PreꞒ Ꞓ O S D C P T J K Pg N
	A pseudoscorpion, a member of the Arachnid class
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Subphylum:	Chelicerata
Clade:	Planaterga
Clade:	Dekatriata; Lamsdell, 2013
Groups
	†Houia; †Winneshiekia; †Chasmataspidida; Sclerophorata Arachnida; †Eurypterida; ;

Dekatriata is a clade of planatergan chelicerates including the groups Arachnida, Chasmataspidida, Eurypterida^[1] and additionally two stem-genera Winneshiekia and Houia.^[2] Dekatriata is defined by an opisthosoma with 13 segments as groundplan (the number proposed to be secondarily reduced in most arachnid orders^[1]) and fused, plate-like appendages on the first opisthosomal segment (somite VII).^[1]

References[edit]

^ ^a ^b ^c Lamsdell, James C. (2012-12-18). "Revised systematics of Palaeozoic 'horseshoe crabs' and the myth of monophyletic Xiphosura". Zoological Journal of the Linnean Society. 167 (1): 1–27. doi:10.1111/j.1096-3642.2012.00874.x. ISSN 0024-4082.
^ Lamsdell, James; Briggs, Derek E. G.; Liu, Huaibao P.; McKay, Robert M. (2015). "A new Ordovician arthropod from the Winneshiek Lagerstätte of Iowa (USA) reveals the ground plan of eurypterids and chasmataspidids". The Science of Nature. 102 (9–10): 63. Bibcode:2015SciNa.102...63L. doi:10.1007/s00114-015-1312-5. PMID 26391849. S2CID 8153035.

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[:0-1] Lamsdell, James C. (2012-12-18). "Revised systematics of Palaeozoic 'horseshoe crabs' and the myth of monophyletic Xiphosura". Zoological Journal of the Linnean Society. 167 (1): 1–27. doi:10.1111/j.1096-3642.2012.00874.x. ISSN 0024-4082.

[2] Lamsdell, James; Briggs, Derek E. G.; Liu, Huaibao P.; McKay, Robert M. (2015). "A new Ordovician arthropod from the Winneshiek Lagerstätte of Iowa (USA) reveals the ground plan of eurypterids and chasmataspidids". The Science of Nature. 102 (9–10): 63. Bibcode:2015SciNa.102...63L. doi:10.1007/s00114-015-1312-5. PMID 26391849. S2CID 8153035.

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