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Ultrastructure of the spines in the copulatory organ of some Monocelididae (Turbellaria, Proseriata)
Martens, E.E. (1984). Ultrastructure of the spines in the copulatory organ of some Monocelididae (Turbellaria, Proseriata). Zoomorphology 104: 261-265
In: Zoomorphology. Springer-Verlag: Berlin; Heidelberg. ISSN 0720-213X; e-ISSN 1432-234X, more
Peer reviewed article  
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Keywords
    Anatomical structures > Body organs > Animal organs > Animal reproductive organs
    Sex > Males
    Stems > Spines
    Monocelididae Hofsten, 1907 [WoRMS]; Proseriata [WoRMS]; Turbellaria [WoRMS]
    Marine/Coastal
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  • Martens, E.E., more
Abstract
    A comparative ultrastructural study of the copulatory organ was carried out in four genera of Turbellaria-Monocelididae. In all four genera the male copulatory organ is of the conjuncta-duplex type and has a cirrus armed with spines. Fine-structural analysis of the cirrus spines reveals that these structures are specializations within the basement lamina of the cirrus. In this part of the male canal the basement lamina has a trilamellar structure. The spines are formed by a local thickening of the middle electron-dense layer and show a structural similarity in all the Monocelididae investigated. The systematic value of this character within the family monocelididae is discussed.
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