Arachnida is a class of invertebrate animals which are joint-legged. They are part of the subphylum Chelicerata. Spiders are the largest order in the class, which also includes scorpions, ticks, mites, harvestmen, solifuges, and even horseshoe crabs. This is another beautiful piece of art by Haeckel.
|Sleeve length, in||8.23||8.51||8.75||9.02||9.26||9.49|