Accession Number : AD0699822

Title :   STRUCTURE AND DEVELOPMENT OF THE GENITAL SYSTEM IN TICKS OF THE SUPERFAMILY IXODOIDEA,

Corporate Author : NAVAL MEDICAL RESEARCH UNIT NO 3 CAIRO (EGYPT) DEPT OF MEDICAL ZOOLOGY

Personal Author(s) : Balashov,Yu. S.

Report Date : 1969

Pagination or Media Count : 37

Abstract : The female genital system in ticks of the superfamily Ixodoidea consists of an unapired ovary, a paired oviduct, a uterus and an ectodermal vagina. On the margin of the cervical and vestibular sections of the latter, a pair of tubular accessory glands opens dorsally. In ixodid ticks, the hypodermis of the vestibular section forms a lobelike accessory gland during feeding. In the subfamily Amblyomminae, a detached seminal receptacle differentiates from the dorsal part of the vagina. In the subfamily Ixodinae, the cervical section of the vagina serves as a seminal receptacle. In the family Argasidae, the uterus serves the same purpose. The male genital system of ixodid ticks consists of a pair of tubular, longitudinally stretched testes which continue as the seminal ducts. Argasid ticks differ only in the presence of a horseshoelike unpaired testis. In unfed larvae of ixodid ticks, embryonic testes form two groups of genital cells between the ganglionic mass and the rectal bladder. Feeding of larvae serves as a stimulus for development of the genital system. In the subfamily Ixodinae development of the male genital system is finished during the nymphal stage and spermatic vesicles of recently-molted males contain mature prosperms. In the subfamily Amblyomminae males require bloodsucking to complete spermatogenesis. In argasid ticks growth of the male genital system requires several numphal instars. In males, mature prosperms usually appear on the first day after molting, after which repeated bloodmeals cause new waves of spermatogenesis. (Author)

Descriptors :   (*TICKS, *REPRODUCTIVE SYSTEM), MORPHOLOGY(BIOLOGY), PARASITES, DISEASE VECTORS, ANATOMY, MALES, FEMALES, HISTOLOGY, LARVAE, NYMPH, PHYSIOLOGY, USSR

Subject Categories : Anatomy and Physiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE