CLADOENDESIS OF EPHEMEROPTERA
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Fig. 196–204. Petersula courtallensis, larvae. 196 – exuviae of metathoracic and abdominal sterna; 197–199 – fore- and hind protoptera; 200 – foreprotoptera of another individual; 201 – larva molting to last instar; 202 – alive larva with moving tergalii; 203–204 – just molted female larva of last instar with non-pigmented cuticle, to show hypodermal coloration.