These are the scorpions, spiders, mites, horseshoe crabs, and "sea spiders." Chelicerates have six pairs of appendages, which are uniramous (unbranched). These include a pair of chelicerae, a pair of pedipalps, and four pairs of ... Home Kingdom Animalia Phylum Arthropoda Subphylum Chelicerata ... Members of this Subphylum...
animaldiversity.ummz.umich.edu/site/accounts/informatio... animaldiversity.ummz.umich.edu/site/accounts/information/Chelicerata.html
This large Class of arthropods includes over 60,000 described species (and most likely a very large number of so-far undescribed ones). Spiders make up the majority of these (over 50,000 The Arachnida also includes a diverse array of smaller groups, ... Arachnids have a pair of tagmata called a prosoma and opisthosoma.
animaldiversity.ummz.umich.edu/site/accounts/informatio... animaldiversity.ummz.umich.edu/site/accounts/information/Arachnida.html
Subphylum Chelicerata Classification ... Subphylum Chelicerata comprises a major group within Phylum Arthropoda, including such animals as the arachnids (e.g., spiders and scopions), the extinct eurypterids, and the extant horseshoe crabs that are considered to be living fossils.
www.fossilmuseum.net/Tree_of_Life/PhylumArthropoda/Subp... www.fossilmuseum.net/Tree_of_Life/PhylumArthropoda/Subphylum-Chelicerata/Chelicerata.htm
Spider building web ... Spider Webs and Drugs ... Scorpion vs. Mouse...
cas.bellarmine.edu/tietjen/images/subphylum_chelicerata... cas.bellarmine.edu/tietjen/images/subphylum_chelicerata.htm
Members of the Subphylum Chelicerata have no antennae and feeding appendages called chelicerae. Their body is divided into two main sections: an anterior cephalothorax and a posterior abdomen.
cas.bellarmine.edu/tietjen/images/chelicerates.htm
An introduction to the biology and ecology of Chelicerates, the subphylum Chelicerata ... The Chelicerata, which I have called a subphylum here for convenience, but which is just as well called a phylum in some texts, is an extremely ancient group of arthropods, ... Phylum Arthropoda; Subphylum Chelicerata...
www.earthlife.net/chelicerata/chelicerata.html www.earthlife.net/chelicerata/chelicerata.html
Chelicerata - Wikipedia, the free encyclopedia
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The subphylum (or phylum) Chelicerata constitutes one of the major subdivisions of the phylum (or superphylum) Arthropoda, and includes horseshoe crabs, scorpions, spiders and mites. They originated...
en.wikipedia.org/wiki/Chelicerata
In members of the Chelicerata, the body consists of a cephalothorax and an abdomen. Unlike other groups of arthropods, no antennae or chewing mandibles are present. Apparently the segments that bear these structures in other arthropods have been lost during the evolution of chelicerates.
userwww.sfsu.edu/~biol240/labs/lab_19arthropod/pages/ch... userwww.sfsu.edu/~biol240/labs/lab_19arthropod/pages/chelicerates.html
This group contains many familiar organisms, including the spiders, mites, scorpions and ticks. Examine the large spider on the right. Again, notice that there are two body regions, On the cephalothorax are two to four pairs of simple eyes. ... Notice that there are six pairs of appendages attached to the cephalothorax:
bio.rutgers.edu/~gb102/lab_2/309dm-arachnids.html
www.mbl.edu/publications/biobull/keys/pdf/10.pdf