Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.


, pl.


(ke-lis'ĭ-ră, -ĭ-rē),
One of the two anterior appendages of arachnids; in ticks and parasitic mites, the chelicerae are piercing and cutting structures, and constitute important feeding organs.
[G. chēlē, claw, + keras, horn]
Farlex Partner Medical Dictionary © Farlex 2012


n. pl. chelic·erae (-ə-rē′)
Either of the first pair of fanglike appendages near the mouth of an arachnid or a horseshoe crab, often modified for grasping and piercing.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.


one of a pair of grasping and piercing organs present in Arachnids and Horseshoe crabs.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
Mentioned in ?
References in periodicals archive ?
(2015) noted that Dinorhax resembles Rhagodidae and Hexisopodidae in terms of cheliceral morphology, Eremo-batidae in terms of the dentition on the chelicera, and the genus Karschia Walter, 1889 (Karschiidae) in terms of flagellum morphology.
6A-B) on the fixed and free rami of the chelicera (Huxley and Salter 1859; Clarke and Ruedemann 1912; Miller 2007a).
Chelicera. It present as follows: light brown, darker in color than legs; hand with 5 setae; galeal seta present; galea with 3 or 4 distal rami; rallum with 3 blades; serrula exterior with 13-15 blades; and fixed finger with 5 teeth, 2 terminal teeth small and acute, and 3 basal teeth are large and blunt, these teeth larger than teeth of protonymph.
Chelicera: Fixed finger with 2 large teeth plus 4 smaller teeth between these, plus 1 very small tooth on margin of large teeth; brush at base of fixed finger composed of 7 setae (G5A), each densely pilose in distal half; lateral surface with 3 large, lanceolate, terminally pilose setae (Gl); internal face of chelicera with 5 short whip-like setae (G4); movable finger serrula composed of 14 long lamellae, blunt guard tooth present subdistally; 1 accessory tooth present at two-thirds from base of serrula.
Colour: Generally pale yellow, chelicera and pedipalp slightly darker, soft parts pale.
Basal segment of chelicera 1.7 mm, distal 2.0 mm long.
- Genital shield equal in width as compared to ventrianal shield; membranous infold present between genital and ventrianal shield; ventrianal shield vase shaped; chelicera fixed digit with 3 apical teeth; setae Z4 less than S4 in length ...............
The chaetotactic formulae of the carapace and chelicera follow Gabbutt & Vachon (1963).
a, body dorsal view 9x; b, chelicera ventrolateral view 24x; c, labium, maxillae and sternum ventral view 24x; d, epigyne internal view 60x; e and f, left male palp dorsolateral and ventrolateral views 18x.
Chelicera 23 long, movable digit without a tooth, fixed digit with 2 teeth (Fig.