| Dekatriata | |
|---|---|
.jpg) | |
| Eurypterus remipes, aeurypterid | |
 | |
| Araneus diadematus, anarachnid | |
Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Subphylum: | Chelicerata |
| Clade: | Planaterga |
| Clade: | Dekatriata Lamsdell, 2013 |
| Groups | |
| |
Dekatriata is a clade ofplanaterganchelicerates including the groupsArachnida,Chasmataspidida,Eurypterida[1] and additionally two stem-generaWinneshiekia andHouia.[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]
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