Ultrastructural studies of Austramphilina elongata (Cestoda, Amphilinidea)
作者： K Rhode , None
DOI: 10.1007/BF00312111
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摘要: The fine structure of larval Austramphilina elongata is described using serial semithin and ultrathin sections. Densely packed germ cells with many ribosomes mitochondria large Golgi complexes fill the middle third body. Some necrotic nuclei were observed near anterior end. neodermis consists a subepidermal syncytium connected to pericarya in parenchyma by means cytoplasmic processes containing peripheral microtubules; electron-dense ovoid bodies condense these processes. Myoblasts are muscle fibres connections rich mitochondria. Twelve (exceptionally eleven) type I gland secretory granules extensive granular endoplasmic reticulum located dorso-posterior part body; they open through 12 (or 11) discrete ducts into an invagination tegument which covered epidermis not outside. Ten II elongate regularly arranged longitudinal microtubules ventral cell bodies; on papilla short distance behind III irregularly round-oval coiled cells; five ventro-anterior openings each side Ducts all have microtubules. spermatozoon has basic pattern two axonemes, single central filament, mitochondrion (mitochondria), row surface interrupted axonemes. In tips epidermal cilia, doublet 1 doublets adjacent it lose their B first close pair filaments spiral fashion, enclosing rod. Presence ultrastructure support validity taxa Neodermata Ehlers Trepaxonemata strong evidence against phylogenetic relationship ‘cestodarians’ — cestodes Acoelomorpha; this also indicated sense receptors ciliary rootlets.
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