Ultrastructure of cuticle formation in a parasitic nematode, Nematospiroides dubius.

摘要: The cuticle of fourth larval stage N. dubius consists a limiting membrane, outer and inner cortices, matrix, two fibrous layers. adult displays membrane cortex, but the remainder is not subdivided into discrete triple-layered, its filamentous surface coat binds Thorotrast (pH 2.1). Time sequence studies on genesis indicate that it plasmalemma transformed from cuticle-hypodermis membrane. cortex matrix form by differentiation hypodermis cytoplasm subjacent to fiber layers under intrahypodermal secretion. thus intrahypodermal. discontinuous in worms, direct communication established between hypodermis.