An ultrastructural study of the egg assembly region of the female reproductive tract of the monogenean [platyhelminth] skin parasites Entobdella soleae and E.hippoglossi

• Autorzy: Tappenden T , Kearn G.C.
• Języki publikacji: EN

Abstrakty

EN

An ultrastructural study has been made of the egg assembly apparatus of the monopisthocotylean monogenean skin parasites Entobdella soleae and E. hippoglossi from the common sole, Solea solea, and the halibut, Hippoglossus hippoglossus, respectively. The ootype consists of a distal tetrahedral chamber where the egg capsule is assembled and a proximal ootype tube where the egg appendage is made. Two types of Mehlis' gland (alpha and beta) open at the proximal end of the ootype tube, which has a non-secretory lining. In both species, the tetrahedral ootype chamber has a syncytial lining, which apparently is not secretory and possesses on its luminal surface stud-like projections, each with vacuolated cytoplasm and an electron-dense core. The ootype chamber is enclosed by a single layer of muscle fibres and is embedded in a spongy "connective tissue". The uterus in E. soleae has a cellular secretory lining, with densely packed luminal microvilli.

Słowa kluczowe

EN

Entobdella hippoglossi; reproductive tract; cytoplasm; egg; assembly region; skin parasite; Entobdella soleae; monogenean parasite; Solea solea; Hippoglossus hippoglossus; muscle fibre; platyhelminth; gland; ootype; halibut; ultrastructure; female

• Wydawca: -
• Czasopismo: Acta Parasitologica
• Rocznik: 1999
• Tom: 44
• Numer: 1
• Opis fizyczny: p.39-50,fig.

Twórcy

autor

Tappenden T

• University of East Anglia, Norwich, NR4 7TJ, U.K.

autor

Kearn G.C.

Bibliografia

• Burton P. R. 1967. Fine structure of the reproductive system of a frog lung fluke. I. Mehlis' gland and associated ducts. Journal of Parasitology, 53, 540-555.
• El-Naggar M. M., Khidr A. A., Kearn G. C. 1990. Ultrastructural observations on the oviduct, Mehlis' glands and ootype of the monogenean Cichlidogyrus halli typicus (Price & Kirk, 1967) Paperna, 1979. International Journal for Parasitology, 20, 203-209.
• Erasmus D. A. 1973. A comparative study of the reproductive system of mature, immature and 'unisexual' female Schistosoma mansoni. Parasitology, 67, 165-183.
• Goto S. 1894. Studies on the ectoparasitic trematodes of Japan. Journal of the College of Science, Imperial University of Tokyo, 8, 1-273.
• Holy J. M., Wittrock D. D. 1986. Ultrastructure of the female reproductive organs (ovary, vitellaria, and Mehlis' gland) of Halipegus eccentricus (Trematoda: Derogenidae). Canadian Journal of Zoology, 64, 2203-2212.
• Kearn G. C. 1963. The egg, oncomiracidium and larval development of Entobdella soleae, a monogenean skin parasite of the common sole. Parasitology, 53, 435-447.
• Kearn G. C. 1985. Observations on egg production in the monogenean Entobdella soleae. International Journal for Parasitology, 15, 187-194.
• Kearn G. C. 1986. The eggs of monogeneans. Advances in Parasitology, 25, 175-273.
• Kearn G. C. 1998. Parasitism and the platyhelminths. Chapman and Hall, London.
• Rohde K., Ebrahimzadeh A. 1969. Das weibliche Geschlechts-system der Gattung Polystomoides Ward, 1917 (Monogenea). Zeitschrift für Parasitenkunde, 33, 110-134.
• Stranock S. D., Haiton D. W. 1975. Ultrastructural observations on Mehlis' gland in the monogeneans, Diplozoon paradoxum and Calicotyle kröyeri. International Journal for Parasitology, 5, 541-550.
• Tappenden T., Kearn G. C. 1999. An experimental study of egg assembly in the monogenean (platyhelminth) skin parasite Entobdella soleae, using a fast preservation technique and transmission electron microscopy. Acta Parasitologica, 44, 51-62.
• Tappenden T., Kearn G. C, Evans-Gowing R. 1993. Fertilization and the functional anatomy of the germarium in the monogenean Entobdella soleae. International Journal for Parasitology, 23, 901-911.
• Thorsell W., Björkman N. 1965. On the fine structure of the Mehlis gland cells in the liver fluke, Fasciola hepatica L. Zeitschrift für Parasitenkunde, 26, 63-70.
• Williams J. B. 1960. The dimorphism of Polystoma integerrimum (Frolich) Rudolphi and its bearing on relationships within the Polystomatidae: Part I. Journal of Helminthology, 34, 151-192.