hypostome


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Related to hypostome: basal disc

hypostome

(ˈhaɪpəˌstəʊm)
n
(Zoology) a mouthpart of crustaceans and some other invertebrates, as well as ticks and mites
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References in periodicals archive ?
Hypostome with three pairs of hypostomal setae [h1(13-18), h2(6-10), h3(13-16)] and a pair of palpcoxal setae (pc) (18-21) (Fig.
(a) anal aperture, (cs) coxal spur, (fe) festoons, (ga) genital aperture, (mg) marginal groove, (h) hypostome, (pal) palps, (pa) porose area, (scu) scutum, (se) setae.
The specimen presented absence of a genital opening, triangular base of the capitulum, lanceolate hypostome and elongated scutum with unomamented rugose surface, and was thus identified and classified as a nymph of A.
Then the chelicerae switch to a breaststroke motion that draws in the barbed tonguelike needle, or hypostome (center).
Maen nhw'n gwneud hyn drwy dorri twll bach yng nghroen y lletywr, ac wedyn yn rhoi eu hypostome i mewn drwy'r twll.
Hyalomma (Euhyalomma) schulzei Olenev, 1931 is recorded and re-described for the first time from Balochistan, Pakistan in detail with special reference to its capitulum, basis capituli, hypostome, palpi, scutum, genital aperture, adanal and plates subanal plates, anus and festoons.
The newly produced cells are necessary to replace cells lost through incorporation into developing buds or those sloughed off at the tips of the tentacles, the hypostome, and the basal disk (Martinez, 1998).
Ticks feed exclusively on blood, and begin the process by cutting a small hole into the host epidermis with their chelicerae and inserting the central hypostome into the cut, thereby attaching to the host.
In addition to the mouthparts, the capitulum contain chelicera (appendages on each side of the mouth) that pierce, tear, or grasp host tissues and protect the hypostome; pedipalps (a pair of jointed appendages) that aid feeding; a hypostome (ventral fusion of the pedipalps) that helps anchor the tick to the host; and a rostrum that extends dorsally over the mouth.
The holotype is associated with a hypostome of Metopolichas sp., two cranidia of Pterygometopus sclerops (Dalman, 1827), and some fragmentary bryozoans, crinoids, brachiopods, and ostracods.
Hydranth with sub-spherical hypostome and 18-20 sort tentacles, about 2.6 mm long.