Electron microscope study on oncospheral envelope morphogenesis in the dilepidid cestode, Dilepis undula [Schrank, 1788]

• Autorzy: Swiderski Z , Salamatin R V , Grytner-Ziecina B , Kornyushin V V , Conn D B
• Języki publikacji: EN

Abstrakty

EN

The origin, differentiation and ultrastructural characteristics of oncospheral envelopes surrounding invasive oncospheres of the dilepidid cestode Dilepis undula are described. In the early preoncospheral phase three primary embryonic envelopes are formed: (1) the capsule; (2) the outer envelope formed by two macromeres; and (3) the inner envelope originating from fusion of two or three mesomeres. Both the outer and inner envelopes of D. undula are therefore cellular in origin and syncytial in nature. Mature eggs of D. undula are slightly oval, measuring 40-50 x 56 µm in diameter. Within fully formed eggs, the mature, invasive oncospheres, 36-40 µm in diameter, are surrounded by five oncospheral or egg envelopes: (1) outer shell; (2) outer envelope; (3) inner envelope; (4) oncospheral membrane; and (5) hook region membrane covering only one pole of the hexacanth. The ultrastructural characteristics of D. undula oncospheral envelopes are discussed in comparison with those of previously examined dilepidids and other cyclophyllideans.

Słowa kluczowe

EN

Cestoda; Dilepididae; cestode egg; Dilepis undula; oncospheral envelope; dilepidid cestode; morphogenesis; ultrastructure

• Wydawca: -
• Czasopismo: Acta Parasitologica
• Rocznik: 2004
• Tom: 49
• Numer: 4
• Opis fizyczny: p.300-308,fig.,ref.

Twórcy

autor

Swiderski Z

• W. Stefański Institute of Parasitology, Polish Academy of Sciences, 51/55 Twarda Street, 00-818 Warsaw, Poland
• Department of General Biology and Parasitology, Medical University of Warsaw, 5 Chałubińskiego Street, 02-004 Warszawa, Poland

autor

Salamatin R V

• Department of General Biology and Parasitology, Medical University of Warsaw, 5 Chałubińskiego Street, 02-004 Warszawa, Poland
• I. Schamlhausen Institute of Zoology, National Academy of Sciences of Ukraine, 15 Khmelnitsky Street, MSP, 01601 Kiev, Ukraine

autor

Grytner-Ziecina B

• Department of General Biology and Parasitology, Medical University of Warsaw, 5 Chałubińskiego Street, 02-004 Warszawa, Poland

autor

Kornyushin V V

• I. Schamlhausen Institute of Zoology, National Academy of Sciences of Ukraine, 15 Khmelnitsky Street, MSP, 01601 Kiev, Ukraine

autor

Conn D B

• School of Mathematical and Natural Sciences, Berry College, Mount Berry, Georgia 30149-5036, U.S.A.

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