Invertebrates

Definition of Invertebrates as it relates to Animals, Arachnids, Opiliones, Araneae, Spiders

Invertebrates, as a part of the Araneae order, are characterized by their lack of a backbone. While spiders fall within this grouping, invertebrates in the context of spiders specifically refer to those species that are not classified as true spiders but share some similarities. Invertebrates found within the Araneae order tend to have elongated bodies and legs, with two main body segments and eight legs. Examples of invertebrates within this category include harvestmen (Opiliones), which have oval-shaped bodies and long, slender legs, and pseudoscorpions, which possess pincer-like appendages. While these creatures are not true spiders, they occupy a similar ecological niche and share some physical traits with their Araneae relatives.

Note
  • [virginiainvertebrates.org] Virginia Institute for Invertebrates – Conservation Natural History of Virginia's Invertebrate Life
  • [CaveInvertebrates.org] caveinvertebrates.org
  • [Exuvium.net] Exuvium – Isopods, invertebrates, food, equipment
  • [SaltwaterFish.com] Saltwater Fish - Coral - Invertebrates - Aquariums - Tanks
  • [brandoncole.com] Brandon Cole Marine Photography. Underwater stock photography of whales, dolphins, seals and sea lions, sharks, manatees, salmon, fish, invertebrates, and more.
  • [Invertebrate.us] Center for Invertebrate Biology – Learn about Invertebrates
  • [xerces.org] The Xerces Society for Invertebrate Conservation
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