Abstract

Pericardial cells are present in a wide variety of insects and are thought to constitute the majority of ‘athrocytes (nephrocytes)’. In contrast, peritracheal athrocytes have only been observed in Bombyx mori L. Although peritracheal athrocytes have a distinct morphology, it is unknown whether these cells are common to all lepidopterans. We anatomically compared eight lepidopteran species: Bombyx mori L. and Bombyx mandarina M. (Bombycidae); Samia cynthia ricini D. (Saturniidae); Agrius convolvuli L. (Sphingidae); Spodoptera litura F. and Mythimna separata W. (Noctuidae); Pieris rapae L. (Pieridae); and Glyphodes pyloalis W. (Crambidae). Of these species, only Bombyx mori L. and Bombyx mandarina M. possess peritracheal athrocytes.

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