a clasper
1Clasper — Clasp er (kl[.a]sp [ e]r), n. 1. One who, or that which, clasps, as a tendril. The claspers of vines. Derham. [1913 Webster] 2. (Zo[ o]l.) (a) One of a pair of organs used by the male for grasping the female among many of the Crustacea. (b) One… …
2Clasper (mathematics) — In the mathematical field of low dimensional topology, a clasper is a surface (with extra structure) in a 3 manifold on which surgery can be performed. Contents 1 Motivation 2 Definition 3 Clasper calculus …
3clasper — the rod like extension of the medial portion of the pelvic fin in male Elasmobranchii and Holocephali. Claspers are used as intromittent organs (not in clasping), the grooves on their facing surfaces together forming a tube for the transmission… …
4Clasper — Valva redirects here. For other uses, see Valva (disambiguation). The claspers of a spotted wobbegong shark (Orectolobus maculatus) In biology, a clasper is a male anatomical structure found some groups of animals, used in mating. Male… …
5clasper gaff — the hook like structure on the inside of the clasper. Derived from denticles, e.g. in Squalus …
6clasper spine — one or more needle like spines which project from the distal end of claspers and are proportionally much larger than clasper hooks. Derived from denticles, e.g. in Squalus and the Jurassic Paleospinax …
7clasper — noun Date: circa 1847 a male copulatory structure: a. one of a pair of external anal processes of an insect that are used to grasp a female b. one of a pair of organs that are extensions of the pelvic fins of cartilaginous fishes …
8clasper hook — the reversed denticle on claspers which point toward the base. Found in certain Scyliorhinidae …
9clasper spur — the conical or claw like structure formed by fusion of tesserae on the claspers of certain sharks, e.g. Heterodontus, Ginglymostoma, Alopias, Cetorhinus …
10clasper — n. [ME. claspen, to embrace] 1. (ARTHROPODA: Crustacea) An appendage, including antenna, modified for holding of female during copulation; or an organ for fixation in parasites. 2. (ARTHROPODA: Insecta) a. A modified male appendage of certain… …