S P Nicholls

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The ultrastructure of the Malpighian tubules of larvae of the Mayfly Ecdyonurus dispar (Ephemeroptera) is described. There are about 60 tubules, which consist of four distinct regions. The most proximal section (region I) appears to be responsible for fluid secretion. A unique feature is the presence of channels leading off the main lumen, which end close(More)
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