ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2017, Vol. 48 ›› Issue (6): 1099-1109.doi: 10.11843/j.issn.0366-6964.2017.06.015

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Observation on the Ultramorphology of the Various Instar Dermacentor niveus (Acari: Ixodidae) in Xinjiang, Northwestern China

WU Hui1, HU Er-cha2, ZHU Yu-tao1, XU Zheng-mao1, BAYIN Chahan1*   

  1. 1. College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi 830052, China;
    2. Animal Husbandry and Veterinary Station of Bazhou Center For Disease Control and Prevention, Korla 841000, China
  • Received:2016-12-23 Online:2017-06-23 Published:2017-06-23

Abstract:

This experiment was conducted to explain the difference between developmental stage and characteristics, and also provide a reference for the prevention and treatment in various instar of Dermacentor niveus. Dermacentor niveus was the dominant species as experimental materials in Xinjiang, while these stages of Dermacentor niveus was identified by stereo microscope and SEM. The ultrastructures of Dermacentor niveus had significantly difference between eggs, larvae, nymphs and adults. Eggs looked like oval, the color and internal structures of eggs were obviously changed in incubation time. Larvae can be distinguished by dental formula 2|2; 3 pairs of odomere; none of spiracular plate, Genital aperture and anal groove; anal vaives with 1 pair of setae. Nymphs can be distinguished by dental formula 3-2|2-3, 4 pairs of podomere; spiracular plate; none of Genital aperture; anal vaives with 3 pairs of setae; basis capitulum, with triangle. Male of adult ticks can be identified by dental formula 3|3; spiracular plate, genital aperture; surface of anal vaives, with 5.5 pairs of setae; ventral idiosoma of Podomere Ⅳ (femur, tibia and metatarsus), with 3 odontoid processes. Female of adult ticks can be also distinguished by dental formula 4-3|3-4; Dorsal of basis capitulum, each side of the porose area with a seta; the surface of anal vaives, with 5 pairs of setae; none of ventral idiosoma of Podomere Ⅳ. Identification and distinction of dominant species was studied in various instar Dermacentor niveus in Xinjiang, and also firstly described for the development and ultrastructures in different growth. The research would provide a reference of integrated control with tick-borne diseases in Xinjiang.

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