Chelicera

Definition and stakes

Portrait of John Mason Clarke John Mason Clarke,  The Eurypterida of New York (1912)

“ See plates 59–61, 62–64
1 Pincers of a chelicera. × 31⁄2 2 Extended chelicera and first two pairs of walking legs. × 3 3 Fragment of first joint and the pincers of a chelicera. × 4 4 Pair of chelicerae, presumably in normal position. × 3 5 The two posterior walking legs in complete preservation. × 3 6 Dorsal view of a large specimen. The anterior portion of the carapace is broken away thereby exposing one extended chelicera and the walking legs of the right side. Both swimming legs are also shown. Natural size 7 Complete walking leg, showing coxal joint and articulation of second joint.
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Source: Wikisource

Sir A. E. Shipley,  The Cambridge natural history, Vol… (1909)

“ A certain power of leaping is said to be practised by some of the more active species. The Chernetidea possess spinning organs, opening on the movable digit of the chelicera. They do not, however, spin snares like the Spiders, nor do they anchor themselves by lines, the sole use of the spinning apparatus being, apparently, to form a silken retreat at the time of egg-laying or of hibernation.
External Structure.—The Chernetid body consists of a cephalothorax, and an abdomen composed of twelve segments.
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Source: Gutenberg

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