Summary ²

Arachnids are a class (Arachnida) of joint-legged invertebrate animals in the subphylum Chelicerata. All arachnids have eight legs, although the front pair of legs in some species has converted to a sensory function, while in other species, different appendages can grow large enough to take on the appearance of extra pairs of legs. The term is derived from the Greek word ἀράχνη (aráchnē), meaning "spider".

Sources and Credits

1. (c) Leo Papandreou, some rights reserved (CC BY-NC-SA), http://www.flickr.com/photos/manualcrank/3623502616/
2. (c) Wikipedia, some rights reserved (CC BY-SA), http://en.wikipedia.org/wiki/Arachnida

More Info

• iNaturalistAU taxon page
• Biodiversity Heritage Library
• BOLD Systems BIN search
• COLECCIÓN NACIONAL DE ARÁCNIDOS INSTITUTO DE BIOLOGÍA UNAM
• Global Biodiversity Information Facility (GBIF)

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