Study of morphology on newly found Heamphysalis concinna tick at Selenge province

The blood sucking 4 species ticks of Haemaphysalis genus were distributed in Mongolia, that an important vectors of diseases transmitting to human and animals and causing economic lost. Newly found Haemaphysalis females in Selenge province was confirmed to H. concinna species based on following features: strong lateral margins of palp article II, heart-shaped scutum with widest at middle, short-wide hypostome, sharpen cornua of basis capituli, posterior margins of basis capituli, ventral surface of basis capituli, latero-anterial I festoon connected with lateral, anterior groove of genital pore and additional spur of leg I trochanter. To confirm morphological description of H. concinna, CoxI sequence analysis was done and results was showed H. concinna CoxI sequences in GenBank with 86-89% identity. The results indicate that the Haemaphysalis concinna tick was distributed in Mongolia and it is announcing that the spread of Haemaphysalis tick in Selenge aimag. Сэлэнгэ аймгийн нутгаас шинээр олдсон Heamphysalis concinna хачгийн хэлбэр зүйн судалгаа Хураангуй: Монгол оронд Haemaphysalis төрлийн 4 зүйлийн хачиг тархан хүн, мал амьтанд шимэгчилж өвчин дамжуулан хохирол учруулдаг. Сэлэнгэ аймгийн нутгаас олдсон хачиг нь хэлбэр зүйн ерөнхий онцлогоороо Haemaphysalis төрөлд хамаарагдаж байлаа. Хошууны пальпын II үеийн хажуугийн нэмэлт хурц ирмэг, бамбайн дунд хэсгээрээ өргөссөн зүрх мэт хэлбэр, богино өргөн гипостом, хошууны суурийн булангийн эвэр, арын ирмэгийн илрэлт, хошууны суурийн доод гадаргуугийн хэлбэр, хачгийн захын I фестон нь зөвхөн биеийн хажуугийн ховилтой холбогдсон байдал, бэлгийн сүвийн урьдах зураасны онцлог, бэлгийн сүвийн хэлбэрийн онцлог, ялгадасны сүвийн арын ховилын онцлог, I хөлийн I үеийн нэмэлт өргөс хэлбэрийн өргөсөлт зэрэг онцлогоороо Haemaphysalis concinna зүйлийн хачиг болох нь батлагдав. Энэхүү хачгийн морфологийн ялган танилтыг CохI генийн нуклеотидын дарааллыг тогтоон баталгаажуулахад ГенБанкинд бүртгэлтэй H. concinna хачгийн нуклеотидын дарааллуудтай 86-89%-ийн адил байлаа. Бидний судалгааны үр дүнд хэлбэр зүйн онцлог, нуклеотидын дараалал тогтоох шинжилгээгээр Монгол оронд H. concinna зүйл хачиг тархсан нь тогтоогдсон тул Монгол орны хачгийн жагсаалтанд оруулж болохыг баталгаажуулж байна. Мөн энэхүү судалгаагаар Сэлэнгэ аймгийн нутгаас Haemaphysalis төрлийн хачиг анх удаа илрүүлэв. Түлхүүр үг: Цус сорогч хачиг, Haemaphysalis concinna, хэлбэр зүй, Сэлэнгэ аймаг

Redescription of Female Laelaps nuttalli Hirst, 1915 (Acari: Dermanyssoidea: Laelapidae) with Emphasis on Its Gnathosoma, Sense Organs and Pulvilli

The present scanning electron microscopic (SEM) study includes the redescription of female Laelaps nuttalli with emphasis on its gnathosoma and pulvilli which were rarely described in superfamily Dermanyssoidea. Chaetotaxy of dorsal shield revealed 40 pairs of setae, 22 on prosoma and 18 on opisthosoma. Epigynial plate carried 4 pairs of setae. Gnathosoma consisted of long basis capituli carrying median hypostome and 2 lateral pedipalps. Hypostome had dorsal labrum of 2 lobes covered with minute papillae, 2 lateral 3-segmented chelicerae, and ventral labium carrying 2 median lobes with laciniae and 2 lateral club-like lobes. Function of labrum papillae might be chemosensory while labium lobules might be mechanical, preventing solid material from entering the oral cavity. Palpal and foreleg tarsal organs comprised 10 and 15 sensilla, respectively. Sensilla of palpal organ were mostly chemoreceptors while those of tarsal organ were probably mechanoreceptors. Each pulvillus terminated with 2 medioventral claws and integumental folds beside longitudinal folds.

Revision of the genus Hyalomma II. The subgenus Hyalommina

The validity of the subgenus Hyalommina is discussed and reaffirmed.Hyalommina is differentiated from Hyalomma by the absence of the subanal plates in the males and by the humped tarsi and the more or less hexagonal basis capituli in both sexes.The male and the female of H. rhipicephaloides Neumann, 1901 are re-described. The larva and nymph of H. rhipicepholoides are described for the first time.The Indian species H. hussaini Sharif, 1928 and H. kumari Sharif, 1928 are re-described. H. hussaini var. brevipunctata Sharif, 1928 is considered as a species inquirenda.H. lewisi Schulze, 1936 is synonymized with Hyalomma truncatum K., 1844 (Feldman-Muhsam, 1954).

The morphology of the British Prostriata with particular reference to Ixodes hexagonus Leach. II

The palps of all stages of Ixodes trianguliceps are provided with a ventral plate below the basal article; formerly this plate was thought to be the first palpal article. This article in the larva and nymph is produced forward into a spur, but in the female tick this spur is incorporated into the basis capituli as the sella. The hypostomes of I. trianguliceps and I. canisuga are redescribed to clear up existing inaccuracies.Ticks in which the rostrum does not extend beyond the apex of the first palpal article are found on birds, and this probably represents a primitive condition. Those with palpal spurs, which may or may not be fused with the basis capituli, are found on birds (not in Britain) or on mammals of the mouse size group, and those where the rostrum is produced beyond the first palpal article occur on a wide range of large and small animals. The longer and more heavily toothed digits of ticks appear to be associated with a wide host range and vice versa. The structure of the digit may also influence the choice of attachment sites by ticks on their hosts because the microstructure of the skin varies in different parts.Variations in size and form of the scuta of some British ticks are described, and the mean growth rate is ascertained from this data. The information shows that the material of I. ricinus and I. hexagonus is homogeneous, and that specific differences occur in size, shape, the position and type of dermal ducts and in the relation between scutal and alloscutal bristles.The morphology of Gené's organ in I. hexagonus is described. It consists of a basal sac-like portion surmounted by four horns and lined with a cuticle beneath an epithelium. The gland is a proliferation of the epithelium and located near the bifurcation of the base into the horns. A watery refractile fluid, secreted by the gland, accumulates between the epidermis and the cuticle in the horn-like extensions. Proximally the thick endocuticle and epidermis lie close together, and two cuticularized rods penetrate the endocuticle for about half-way along the stalk. The rods arise from the postero-dorsal margin of the basis capituli. Muscles, arising from the free ends of the rods, pass back to near the hind-margin of the scutum; they retract the basis capituli after egg laying and indirectly assist in the retraction of Gené's organ. A suggested mechanism for everting Gené's organ in I. hexagonus is outlined.During feeding the opisthosomatic cuticle of all developmental stages of the tick is much stretched. In the larva, where the cuticle is thin, this is effected by the flattening of the epicuticular pleats, but nymphs and females have, in addition, two longitudinal folds alongside the body which stretch to a far greater extent than do the epicuticular pleats. Similar folds are present between the hard ventral plates and the scutum and between the epimeral and median plates in the male. Coupled with the large size of the male digit, this suggests that morphologically, at least, males can imbibe blood.The growth of the leg segments of I. hexagonus is not constant from stage to stage, and as a result the shortest ‘leg-length’ of the female exceeds the longest ‘leg-length’ of the male.

A NEW SPECIES OF TICK FOUND ON SHREWS

FEMALE. Dimensions of unengorged holotype–1.2 mm. (to tip of scapula) x .78 mm. Colour–pale, dirty white, engorged specimens pale and yellowish.Capitulum. Length 340 microns (tip of hypostome io dorsal ridge); width (at cornua) 300 microns. Surface of basis capituli smooth and impunctate. Cornua heavily chitinized but not prominent.

Rhipicephalus ayrei n.sp. (a Tick) from Kenya Colony

Male: Large, 4·00–7–75 mm. long. Salient features: Inornate; basis capituli nearly twice as broad as long; lateral angles within the anterior third and rather acute. Anterior coxae slightly prominent in dorsal view. Lateral grooves well-marked and including two festoons. Dorsal furrows distinct, the lateral somewhat comma-shaped, the median straight and continued anteriorly beyond the laterals. Punctations very numerous, usually discreet and equal in the median area which appears shagreened; few on the scapulae, lateral folds and festoons, which form a glossy border. Adanal plates with straight external border and broad, rounded posterior border; internal border slightly concave to where it joins the posterior border to form a small point in a number of specimens. Accessory plates distinct. Spiracle short with slight dorsal curve.